Monthly Archives: December 2020

Digital Temperature Recorder-Paper Less Recorder R7600

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Temperature Recorder can realize the signal acquisition and paperless recording of industrial temperature sensors. Also called Temperature data logger. Suitable for temperature and humidity monitoring, heat treatment process, current and voltage measurement, etc.

Digital Temperature Recorder-Paper Less| Control &Monitor

Temperature Recorder R7600 channel fully isolated universal signal input, 1-12 channels are optional. Multiple communication interfaces.

Support thermal resistance: PT100, Cu50, G53, Cu100, BA1, BA2 (requires three-wire resistance balance, lead resistance <10Ω).

Thermocouple: S, B, K, T, R, E, N, J

Sino-Inst offers a variety of Record and Analyze instruments for industrial control. If you have any questions, please contact our sales engineers.

Request a Quote
More Recorders

Features of Temperature Recorder R7600

  • Can support touch function (additional function).
  • Can support dual communication function (additional function).
  • Can support timing printing function (additional function).
  • Can support DC power supply (additional function).
  • Can support communication collection function (customized function).
  • Can support feed output function (optional function).
  • Can support alarm output function (optional function).
  • Can support manual serial port printing function (optional function).
  • Can support standard serial communication function (optional function).
  • Data recording/dumping and backup function (standard function).
  • Universal analog input (standard function).

Sepecification of Temperature Recorder R7600

Display

  • Screen: 7-inch true color TFT LCD
  • Accuracy: Real-time display: ±0.2% F.S.
  • Recall accuracy: ±0.2% F.S.
  • (Note: The cold junction error of thermocouple should be removed)

Processor

Using high-performance ARM Cortex-M3 32-bit RISC core. Multi-channel signal acquisition, recording, display and multi-channel alarm can be realized at the same time

Storage module

Use large-capacity parallel NAND FLASH flash memory chips to store historical data. Use serial FRAM memory chip to store key information such as system configuration parameters

Input function

  • Input specifications: fully isolated universal input, maximum support 6 analog inputs
  • Voltage input: 0-5V, 1-5V, 0-20mV, 0-100mV
  • Current input: 0-10mA, 4-20mA, 0-20mA
  • Resistance input: Res
  • Thermal resistance: PT100, Cu50, G53, Cu100, BA1, BA2 (requires three-wire resistance balance, lead resistance <10Ω)
  • Thermocouple: S, B, K, T, R, E, N, J
  • Radiation pyrometer: F1, F2
  • Tungsten rhenium: WRe3-25, WRe5-26

Note: other input signals (such as digital input (DI) or index number (such as PT1000) must be specified when ordering

Output function

  • Power distribution output: up to 2 groups of transmitter power distribution +24VDC, each group power distribution ≤60mA
  • Relay alarm output: support up to 6 relay alarm outputs, contact capacity 3A@250VAC/3A@30VDC, configurable upper limit, upper limit, lower limit, lower limit alarm

Newsletter printing

Communication interface: Provide RS232C and RS485 two communication interfaces for users to choose, support simultaneous use of RS232C and RS485, support simultaneous use of RS232C and RS232C, support Modbus RTU protocol, baud rate —- (1200, 4800, 9600, 19200, 38400, 57600)
Print interface: RS232C directly connected to the mini printer, baud rate 1200

Record function

  • Recording capacity: 64/128/192/248MB (FLASH capacity is optional);
  • Recording interval: 1 second to 240 seconds, divided into 11 levels:
  • 1/2/4/8/12/24/36/60/120/180/240 seconds optional;
  • Recording time: The length of the recording time is related to the FLASH memory capacity, the number of input points, and the recording interval. The calculation formula is as follows (the unit of the value should be consistent with the formula):

Data transfer

Data backup and transfer: support USB 1.1, 2.0 USB flash drives, support 1G to 32G USB flash drives for data transfer. Strong compatibility, compatible with most USB flash drives on the market (industrial USB flash drives are recommended)

Power supply

Power supply: 100~240VAC (rated power supply voltage 220VAC), 50/60HZ AC power supply, support 24VDC (18VDC-36VDC) DC power supply (DC power supply should be specified when ordering)

Protective function

Power failure protection: Built-in memory to protect parameters and historical data, which will be permanently stored after power failure
Clock protection: integrated hardware clock, can run accurately even after power failure

Error accuracy

Thermocouple cold junction compensation error: ±2℃
Clock error: ±2 seconds/day

Working environment [It is forbidden to work in a flammable and corrosive environment]

Working temperature: 0～50℃ (avoid direct sunlight)
Relative humidity: 0～85%R.H (no condensation)
Altitude: <2000m (except for special specifications)

Transportation and storage environment

Transportation and storage temperature: -20～60℃ (avoid direct sunlight)
Transportation and storage humidity: 5～95%R.H (non-condensing)

Instrument Net Weight: Net Weight: ≤3.0Kg

Note:
The technical index is the general index of this series of instruments, the function configuration please refer to the actual product.
If the technical indicators are inconsistent with the actual instrument, please refer to the actual instrument.

Read more about: What is a Paperless Recorder?

Temperature recorder price

R7600 series enhanced paperless recorder, 7-inch high-end color LCD display. Channel fully isolated universal signal input, 1-12 channels are optional. Multiple communication interfaces, 6 relay outputs, 6 feed outputs and other functions can be freely selected. It is most suitable for temperature and humidity monitoring, heat treatment processes, current and voltage measurement, etc.

This product has been certified by the testing agency, and the EMC test can reach level 4. Stable and reliable performance, rich colors, simple operation, but also allows you to experience the charm of good quality.

The price of Temperature Recorder R7600 is determined by the parameters of the product. For example, the number of channels. Functional requirements. Output function, etc.

Sino-Inst is the manufacturer of Temperature Recorder. Committed to providing customers with quality products and competitive prices. Temperature Recorder reference price: USD 650.00/pc.

Types of Paper Less Recorders

  • According to the type of recording signal:
    • Pressure recorder, flow recorder, speed recorder, temperature recorder, humidity recorder, liquid level recorder, level recorder, power recorder, F0 value recorder
  • According to the number of channels:
    • Single-channel recorder, multi-channel recorder. The number of channels of the recorder can range from 1 channel to 32 channels and so on.
  • Divided by function:
    • Alarm recorder, flow accumulation recorder, communication recorder, print recorder
  • According to the screen display:
    • Blue screen recorder, color screen recorder

More Featured Paperless Recorders

Universal Input-Paperless Recorder R7100
Flow Totalizer F3000X

You may like:

Sino-Inst offers over 10 Paperless Recorders for Industrial data recording and analysis. Paperless Recorder HS Code: 9031809090.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Temperature Recorders are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Paperless Recorders, located in China.

Flow Totalizer F3000X

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Flow Totalizer is also called flow rate totalizer. Used with various flow meters to perform data measurement and display, cumulative calculation, alarm control, transmission output, data acquisition, and communication.

Flow Totalizer collects, displays, controls, remotely transmits, communicates, and prints various signals such as on-site temperature, pressure, and flow. It constitutes a digital acquisition system and a control and monitoring system. It is widely used in trade settlement and factory measurement management networks in petrochemical, chemical, metallurgical, electric power, light industry, medicine and city gas industries.

Sino-Inst offers a variety of Record and Analyze instruments for industrial control. If you have any questions, please contact our sales engineers.

Request a Quote
More Recorders

The flow totalizer refers to the secondary instrument of the flowmeter, which is responsible for sampling, conversion, calculation, and data storage. It is used with a primary meter to form a complete flow meter. The primary meter often refers to the sensor part, such as an orifice throttling device.

The flow totalizer controller collects, displays, controls, remotely transmits, communicates, and prints various signals such as on-site temperature, pressure, and flow. It constitutes a digital acquisition system and control system, with LCD and digital display, and various external dimensions. It is suitable for flow accumulation measurement and control of various liquids, general gases, superheated steam, and saturated steam. It can carry out quantitative/batch control of the medium (with start, stop, and clear functions), and it can be used with various flow sensors or transmitters to adapt to various measurement control occasions.

Read more about: What is a paperless recorder?

Features of Flow Totalizer F3000X

  • Wide range of applicable flow meters and fluid media.
  • The flow unit is automatically converted, and the flow coefficient of the differential pressure flowmeter is automatically calculated.
  • The steam density is calculated according to the IAPWS-IF97 formula, and the superheated and saturated state of the steam is automatically recognized.
  • Emergency fault-tolerant function: when temperature and pressure signals are abnormal, use emergency parameter values ​​for compensation calculations.
  • Debug calculation function: support to view the original value of each transmitter/sensor signal; support to view the intermediate parameters such as density in the flow calculation.
  • Audit record: Power failure record function.
  • Alarm list: Support recording instantaneous or cumulative alarm information such as flow, temperature, pressure, differential pressure/frequency/volume/mass.
  • Cumulative report: Supports cumulative traffic class report, daily report, monthly report, and annual report.
  • Communication function: standard Modbus RTU protocol, support RS485, RS232C communication interface.
  • Transmission function: support standard current transmission output, signal source channel is optional.
  • Report backup function: Support the backup function of each cumulative report.
  • Import and export function: support the import and export function of instrument configuration parameters.
  • Timing printing function: supports the timing printing function of flow, temperature, pressure, accumulation and other data.

Specifications of Flow Totalizer F3000X

Display:
Screen: Screen: 128*64 dot matrix monochrome liquid crystal display (LCD)
Accuracy: Accuracy: Display and measurement accuracy: ±0.2% F.S.

Processor: High-performance ARM Cortex-M3 32-bit RISC core

Input function
Flow channel: Channel: analog signal: 4-20mA, 0-10mA, and other signals;
Frequency signal: Fr (range: 0.0-5000.0HZ, low-level ≤ 1V, high-level ≥ 5V)
Temperature channel: Temperature channel: 0-10mA, 4-20mA, Pt100 and other signals
Pressure channel: Pressure channel: 0-10mA, 4-20mA, and other signals
Other input signals (such as digital input (DI)) should be specified when ordering

Output function
Power distribution output: Provide 1 group (F12) 12VDC and 2 groups (Q24, P24) 24VDC sensor power supply, the maximum output current of a single channel is 30mA, of which flow current 24V power distribution Q24 and pressure 24V power distribution P24 share the same ground
Transmission output: Support 1 standard current transmission output (source is optional), load capacity 500Ω (maximum)
Relay output: Support up to 3 relay outputs, contact capacity 3A@250VAC/3A@30VDC, configurable upper limit, upper limit, lower limit, lower limit alarm

Communication function
Communication interface: Provide RS232C and RS485 two communication interfaces for users to choose, support Modbus RTU protocol, baud rate —- (1200, 4800, 9600)
Print interface: RS232C directly connected to the mini printer, baud rate 1200

Report backup
Report backup and transfer: Backup and transfer: support USB 1.1, 2.0 protocol, support for cumulative report transfer from 1G to 32G U disk, strong compatibility, compatible with most U disks on the market

Power supply
AC power supply: AC power supply: 220VAC/50HZ AC power supply
DC power supply: Current power supply: support 24VDC (18VDC-36VDC) DC power supply; support 12VDC (9VDC-18VDC) DC power supply, DC power supply should be specified when ordering

Error accuracy
Clock error: Clock error: ±2 seconds/day

Working environment
Ambient temperature: Ambient temperature: 0～50℃ (avoid direct sunlight)
Environmental humidity: Environmental humidity: 0～85%R.H (non-condensing)
Altitude: Altitude: <2000 meters

Prohibit working inflammable and corrosive environment

Net weight
Net weight: Net weight: ≤1.0Kg

Technical index description
The technical index is the general index of this series of instruments, and the function configuration is subject to the actual product.
If the technical indicators are inconsistent with the actual instrument, please refer to the actual instrument.

Flow totalizer working principle

The flow totalizer is composed of four parts: measurement loop, digital panel meter, regulator and power supply.

The stabilized power supply converts the 220V power supply into a stable DC voltage as the other part of the power supply.

The measurement loop processes the signal (voltage, current, etc.) sent by the flow transmitter into a voltage signal.

After A/D conversion, the signal is sent to a dedicated central processing unit for processing. Not only to the digital panel meter but also to the regulator. After comparing with the set value, it outputs a control or alarm signal according to the regulation rule.

The flow totalizer is used to measure the instantaneous flow of liquid or solid in the industrial field.

The signal output by the flowmeter is generally a pulse signal or a 4-20mA current signal, both of which output instantaneous flow. Our purpose is to calculate and display the instantaneous flow value and calculate the cumulative value in the PLC.

When the input signal is a pulse signal, when calculating the instantaneous flow rate, it must be calculated in strict time intervals to ensure the accuracy of the instantaneous flow rate.

Therefore, the calculation of instantaneous flow must be done with a timed interrupt. Moreover, only this one interrupt program can be run in the PLC system, and no other interrupts are allowed (even low-priority interrupts are not allowed to run). To prevent interference with the accuracy of the time interval of the timing interruption.

Calculating the instantaneous flow rate is to convert the number of accumulated pulses in this time period into the accumulated flow rate. Divided by time is the instantaneous flow.

For 4-20mA input, the instantaneous flow can be directly obtained by simply converting according to its corresponding range. The cumulative flow is to add up the cumulative flow in each time period.

In the actual use of PLC programming, the following issues must be paid attention to:

(1) Whether the input pulse frequency range exceeds the receiving range of the PLC;
(2) How to ensure correct calculation when the PLC high-speed counter reaches the maximum count value;
(3) How to ensure that the timing interruption is not disturbed;
(4) How to avoid errors in calculating the cumulative amount;
(5) The maximum cumulative digits of the cumulative amount;
(6) How to reset the totalizer.

Totalizer vs Flow Meter

A pure totalizer is not a flow meter.

Usually, flow meters measure instantaneous flow. If you need to know the total amount of flow, you need to use a totalizer.

A complete flow detection system includes several parts such as sensing, transmission, calculation, integration, display, etc. Each part can be an independent instrument. It is also possible to integrate several functions into one watch.

Many flow totalizers on the market now integrate calculation, totalization, and display. It includes most of the functions of the flow system. Some manufacturers set the totalizer and other parts as flow meters and use the name of the complete set on the totalizer. If you buy the totalizer alone, you will see that the name is flowmeter.

So the flowmeter [maybe] includes a totalizer, but the totalizer is not a flowmeter.

If you get here, you still can’t find a suitable product. Then let us take a more detailed look at the functions and applications of the Flow Totalizer Meter.

Read more about: Flow Totalizer Meter vs Flow Meter

Featured Flow Meters

Sino-Inst offers over 10 Flow Totalizers for Industrial data recording and analysis.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Flow Totalizers are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Flow Totalizers, located in China.

Universal Input-Paperless Recorder R7100

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Paperless Recorder is an intelligent Digital chart recorder. Data can be remotely recorded, analyzed, stored, and signal output. LCD color screen, maximum 16 channels.

R7100 series color paperless recorder supports 1-16 channels of universal input. R7100 has a powerful display function, real-time curve display, historical curve recall, bar graph display, alarm list display, power-down list display.
Configurable and optional inputs: standard voltage, standard current, thermocouple, thermal resistance, frequency, switch value, pulse, etc. It can be equipped with 6 relay alarm outputs, 6 feed outputs, 4 transmitter outputs, and RS232/485 communication interface is optional. Bluetooth function, GPRS function Ethernet interface, micro printer interface and USB interface.

Sino-Inst offers a variety of Record and Analyze instruments for industrial control. If you have any questions, please contact our sales engineers.

Request a Quote
More Recorders

Features of Paperless Recorder R7100

  • Can support touch function (additional function).
  • Can support dual communication functions (additional functions).
  • Can support timing printing function (additional function).
  • Can support DC power supply (additional function).
  • It can support the custom editing function of tag and unit (additional function).
  • Can support Ethernet communication (customized function).
  • Can support communication collection function (customized function).
  • Can support feed output function (optional function).
  • Can support transmission output function (optional function).
  • Can support alarm output function (optional function).
  • May support PID control function (optional function).
  • Can support manual serial port printing function (optional function).
  • Can support standard serial communication function (optional function).
  • Can support flow accumulation temperature and pressure compensation function (optional function).
  • Data recording/dumping backup function (standard function).
  • Universal analog input (standard function).

Specifications of Paperless Recorder R7100

Display

Screen: 7-inch true color TFT LCD (800 * 480 dot matrix)

Accuracy: Real-time display: ± 0.2% F.S. Remembrance accuracy: ± 0.2% F.S. (Note: The thermocouple should remove the cold junction error)

Processor

Using high-performance ARM Cortex-M3 32-bit RISC core, which can realize multi-channel signal acquisition, recording, display and multi-channel alarm at the same time

Storage module

A large-capacity parallel NAND FLASH memory chip is used to store historical data, and a serial FRAM memory chip is used to store system configuration parameters and other key information

Input function

  • Input specifications: fully isolated universal input, maximum support 16 analog inputs
  • Voltage input: 0-5V, 1-5V, 0-20mV, 0-100mV
  • Current input: 0-10mA, 4-20mA, 0-20mA
  • Resistance input: Res
  • Thermal resistance: PT100, Cu50, G53, Cu100, BA1, BA2 (requires three-wire resistance balance, lead resistance <10Ω)
  • Thermocouple: S, B, K, T, R, E, N, J
  • Radiation pyrometer: F1, F2
  • Tungsten rhenium: WRe3-25, WRe5-26

Note: Its input signal (such as digital input (DI), pulse input (PI)) or index number (such as PT1000) need to be indicated when ordering.

Output function

Power distribution output: support up to 3 groups of transmitter isolated power distribution + 24VDC, each group power distribution ≤60mA, support other specifications of isolated power distribution (such as 12VDC, 5VDC power distribution output)

Transmitter output: Support up to 4 channels of standard current [4-20mA, 0-20mA, 0-10mA] Transmitter output, load capacity 750Ω (maximum), easy to display instrument or DCS / PLC acquisition, to achieve long distance signal Transmission

Relay alarm output: support up to 6 relay alarm outputs, contact capacity 1A @ 250VAC / 1A @ 30VDC (maximum contact capacity can be customized), can configure upper and upper limit, upper limit, lower limit, lower and lower limit alarm

Communication printing

Communication interface: provide RS232C and RS485 two communication interfaces for users to choose, support simultaneous use of RS232C and RS485, support simultaneous use of RS232C and RS232C, support Modbus RTU protocol, baud rate —- (1200, 4800, 9600, 19200, 38400, 57600)

Print interface: RS232C directly connected to a mini printer, baud rate 1200

Record function

  • Recording capacity: 64/128/192 / 248MB (FLASH capacity is optional);
  • Recording interval: 1 second to 240 seconds, divided into 11 files: 1/2/4/8/12/24/36/60/120/180/240 seconds optional;
  • Recording time: The length of the recording time is related to the FLASH memory capacity, input points, and recording interval

Data transfer

Data backup and transfer: Support USB 1.1, 2.0 USB flash drive, support 1G to 32G U disk for data transfer, strong compatibility, compatible with most U disks on the market (recommended to use industrial version USB flash drive)

Power supply

Power supply: 100 ~ 240VAC (rated power supply voltage 220VAC), 50 / 60HZ AC power supply, support 24VDC (18VDC-36VDC) DC power supply (DC power supply must be specified when ordering)

Protective function

Power-off protection: Built-in memory protection parameters and historical data, permanently saved after power off Clock protection: integrated hardware clock, can also run accurately after power off

Error accuracy

Thermocouple cold junction compensation error: ± 2 ℃

Clock error: ± 2 seconds / day

Working environment [Forbidden to work in flammable and corrosive environment]

Working temperature: 0 ～ 50 ℃ (avoid direct sunlight)

Relative humidity: 0 ～ 85% R.H (no condensation)

Altitude: <2000m (except special specifications)

Transportation and storage environment

Transportation and storage temperature: -20 ～ 60 ℃ (avoid direct sunlight)

Transportation and storage humidity: 5 ～ 95% R.H (no condensation)

Net weight

Net weight: ≤1.5Kg

Note:

The technical indicators are the general indicators of this series of instruments. Please refer to the actual product for function configuration.

If the technical indicators are inconsistent with the physical instrument, please refer to the physical object.

Paperless Recorder R7100 Dimensions

R7100 paperless recorder can only match a variety of sensors. Support temperature sensors, humidity sensors, pressure sensors, current and voltage transmitters, liquid level sensors, flow meters, etc.

Read more about: What is a Paperless Recorder?

Paperless recorder working principle

A recorder is an instrument that converts the process of one or more variables over time or another variable into recognizable and readable signals. It can save the recorded signal changes for analysis and processing. The biggest feature of the recorder is that it can automatically record the slow change process and transient level change process of periodic or non-periodic multi-channel signals.

According to the types of input and output signals, recorders can be divided into analog-digital, digital-analog, analog-analog, digital-digital and other forms. Their main circuit varies according to the output form.

When the output is a digital signal, its main circuit is a memory circuit that can store digital information. It can send digital signals to tape drives, punchers or other equipment at any time. Or observe the analog waveform with an oscilloscope after proper conversion, such as digital memory and waveform memory.

When the output is an analog signal, the main circuit of the recorder is an analog amplifier drive circuit without storage function. The signal must be recorded on paper, photosensitive film, or tape immediately using appropriate recording devices and methods. The information can be saved for further analysis and processing. Such as various pen recorders, light recorders, plotters, tape recorders, etc.

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Absolute Pressure Transmitter
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HS-2000 Ultrasonic Tank Level Sensor-External Mounted

Sino-Inst offers over 10 Paperless Recorders for Industrial data recording and analysis. Paperless Recorder HS Code: 9031809090.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Paperless Recorders are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Paperless Recorders, located in China.

Digital chart recorders

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What is a digital chart recorder?

Industrial digital chart recorders refers to an electronic instrument that remotely displays and counts signals such as pressure, temperature, flow, and liquid level in the industry.

Digital chart recorders record the collected data/calculated data in the internal storage system of the instrument with time as the base axis. It does not consume any commonly used recording facilities. For example: paper, pen and ink. Sino-Inst provides time-saving paperless chart recorders with up to 64 channels.

The stored data recorded in the instrument is displayed on the LCD screen after calculation and simulation. Commonly used LCD screens are widely used. On the LCD screen, digital display, bar graph display, curve display, alarm list, etc. can be displayed.

The data collected by the paperless recorder are commonly used: temperature, pressure, flow, liquid level, voltage, current, humidity, frequency, vibration, speed, etc.

Common Industrial Digital chart recorders:

Pressure recorder, flow recorder, speed recorder, temperature recorder, humidity recorder, liquid level recorder, level recorder, power recorder, F0 value recorder.

Universal Input-Paperless Recorder R7100
Flow Totalizer F3000X
Temperature Recorder R7600

What are the functions of the Digital chart Recorder?

Paperless recorder is an instrument that can convert temperature and pressure into current, voltage, thermocouple, thermal resistance and other signals through a transmitter, and record and process the data.

Generally, it has functions such as alarm output, analog output, power distribution output, and communication.

The paperless recorder is an instrument that connects to a printer or U disk through RS485, RS232 communication, CF card transfer, and PC connection communication.

Read more about: Common Units Of Pressure

Digital chart recorders signal types

Type of inputRangeMeasuring rangePrecision
DVC0~20mV-9999~199990.20%
0~100mV-9999~19999-0.5V~+5.500V0.20%
0~5V-9999~19999-0.5V~+5.500V0.20%
1~5V-9999~19999-0.5V~+5.500V0.20%
DCI0~100mA-9999~199990.20%
4~20mA-9999~19999-0.5V~+5.500V0.20%
TCS-50.0~100.0℃3.7℃
100.0~1768.0℃2℃To be determined2℃
B0~1820.0℃±（0.05%rdg+0.5℃）2℃
K-50.0~1372.0℃±（0.05%rdg+0.5℃）2℃
E-50.0~1000.0℃±（0.05%rdg+0.5℃）2℃
J-50.0~1200.0℃±（0.05%rdg+0.5℃）2℃
T-199.90~320.00℃±（0.05%rdg+0.5℃）2℃
Wer3-250.0~2300.0℃±（0.05%rdg+0.5℃）5℃
RTDPt100200.0~850.0℃1℃
Cu50-50.00~150.00℃±（0.05%rdg+0.5℃）1℃
resistance0~350-9999~199991℃
frequency0－10KHZ0~199991℃

Extended reading: RTD vs. Thermocouple: What’s the Difference, and Which Should You Use?

Digital chart recorder for pressure testing

The input signals of the paperless recorder are all “universal” full-switching signals, and can input standard analog signals 4~20MA, 1~5V, 0-20MA, 0~5V, 0~10V, etc. Generally, the output signal of the pressure transmitter is a passive signal of 4-20MA signal. As long as the recorder is equipped with a 24V power feed function, it can be displayed after setting the parameters according to the correct wiring indicated on the wiring diagram.

Read more about: Paperless recorder working principle

You may like:

Sino-Inst offers over 10 Digital chart recorders for Industrial data recording and analysis. Digital chart recorders HS Code: 9031809090.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Temperature Recorders are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Paperless Recorders, located in China.

High Temperature Pressure Switch

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High temperature pressure switch meets the needs of industrial use in special environments with high temperature and high pressure. The current maximum temperature can withstand 300℃.

The high temperature pressure switch pressure set point can reach 30MPa. The product is a fully electronic structure, and the front end adopts an oil-filled piezoresistive pressure sensor with isolation membrane. Through high-precision A/D conversion, processed by a microprocessor. On-site display, and output one analog quantity and four switching quantities plus 485 communication.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Specifications of High Temperature Pressure Switch

Pressure range:Conventional (-0.1~0…0.1 0.25 0.4 0.6 1.0 1.6 2.5 4 6 10 16 25 40 60 100 160) MPa
Micro pressure (0~1 2 5 10 25 40 60 100) kPa
Overload capacity150% (>10MPa) 200% (≤10MPa)
Output formRelay output, normally open normally closed
Output relay capacity220V AC 5A
Power supply       220V AC; 24V DC; 380V AC
Setting rangeThe control point can be set in the full range section, and the anti-fluctuation hysteresis setting.
Accurate degree0.5% FS
Warm degree200°C
Measuring mediumGas, water, oil
Operating temperature-20～65℃
Connection sizeG1/2 (four-point water pipe thread)
M20*1.5 (pressure gauge interface)
G1/4 (two divisions of thread)

Guess You’ll Like: Explosion Proof Pressure Transmitter

Differential Pressure Transmitter Installation Guide

What can the high temperature pressure switch do?

  1. The high temperature resistant pressure switch is to amplify the pressure signal through a high-precision instrument amplifier. The data is collected and processed by a high-speed MCU. The built-in precision sensor is used for compensation. It is a high-precision device that detects pressure and liquid level signals. Realizes pressure and liquid level monitoring and control. .
  2. It is widely used in automation systems for measuring gas and liquid pressure in chemical engineering, machinery, hydrology, electric power, environmental protection, etc. Because the adjustment is convenient and flexible, and the installation is simple, it can replace most occasions where liquid level switches are used.
  3. The core of the product adopts a new type of intelligent micro-processing chip, with stable functions and practical performance.
  4. LED displays the current pressure or level value.
  5. The pressure or liquid level can be set to start or stop according to your needs.
  6. Three units of four LED products can be selected according to customer needs: Mpa KG.F/CM2, PSI.
  7. High and low pressure or liquid level alarm points can be set. And output to the control equipment through a relay or optocoupler; output dual-circuit relay (single pole double throw) switch value.
  8. Two relays/two optocouplers/with 4-20mA/0-10V output can be selected.
  9. It adopts high-precision pressure sensor, which has higher accuracy than mechanical high temperature pressure switch. It has small hysteresis, fast response, stable and reliable. There is no dead zone adjustment, and the relay action pressure point can be set arbitrarily within the entire range.
  10. Use the buttons to adjust the action pressure, which is easy to use and more flexible. Protection grade: IP65, which can be used in harsh environments.

Extended reading: High Temperature Flow Meter

What is the difference between a pressure switch and a pressure sensor?

Pressure sensor is the most commonly used sensor in industrial practice. A sensor that can sense pressure and convert it into a usable output signal. The pressure switch is to open or close the system under a certain pressure to realize the detection, display, alarm and control signal output of the medium pressure signal. Ensure that the system is operating normally. Then the pressure sensor and the pressure switch are used as pressure-related instruments at the same time. What is the difference in the use of the two?

The pressure switch is a kind of switch as its name implies, but this kind of switch is a pressure set in advance. When the measured medium reaches this pressure, the switch can be turned on or off automatically. The pressure switch must be given a pressure value in advance, and then turn the switch on or off. Used for simple control, they are all on-off outputs.

The pressure sensor can output not only analog signal, but also digital signal output. Digital signal processing is more convenient, and remote transmission is also possible. The pressure sensor is composed of a pressure-sensitive element and a conversion circuit, which uses the pressure of the measured medium to act on the pressure-sensitive element to produce a small change in current or voltage output.

Sensors often need to be used in conjunction with external amplifier circuits to complete the process from pressure detection to control and display. Since the pressure sensor is a primary element, the signal feedback from the pressure sensor needs to be processed, analyzed, stored, and controlled by the measurement and control system. Make industrial automation equipment and engineering operation control more intelligent.

In terms of price, pressure sensors are naturally more expensive than pressure switches, because pressure sensors have internal signal conditioning circuits. But considering the service life and safety, the cost performance of the pressure sensor is much higher than that of the pressure switch. The after-sales service, product reputation, and market differences of pressure sensors are better than pressure switches. Obviously, the pressure sensor should be preferred.

The above is the difference between a pressure sensor and a pressure switch. I hope that the introduction of the editor can provide some help to everyone’s use.

Extended reading: Miniature Pressure Switch

Featured high temperature-high pressure transducer

SI-512H High Temperature Pressure Sensor
SIJC-1000HSM-Silicon Pressure Sensor
SI-706 Combined Pressure and Temperature Sensor-Dual function
SI-702 High Pressure Sensor
SI-702S Ultra-High Pressure Senors

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Sino-Inst offers over 10 Electronic Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of High Temperature Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of High Temperature Pressure Switch instrumentation, located in China.

High Pressure Switch Y-505

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High pressure switch is a multifunctional high pressure switch suitable for a variety of hydraulic and pneumatic applications. The setting value is adjustable, and its adjustment range is 0.3-40MPa.

High pressure switch can be used for compressed air containing oil mist and other gas containing oil mist that has no corrosive effect on pressure sensor materials, hydraulic oil, water-oil emulsion and neutral liquid medium with good lubricating performance. The setting value of the controller is adjustable, and its adjustment range is 0.3-40MPa.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

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Features High Pressure Switch

  1. Mechanical switch, no power supply, easy to use
  2. Has normally open normally closed contacts
  3. Adjustable pressure alarm point
  4. Suitable for occasions with explosion-proof requirements
  5. Easy to use, stable work, long mechanical life
  6. For neutral gas containing oil mist

Specifications High Pressure Switch

Working parametersnormal typeExplosion-proof
Working viscosity:＜1×10-3m2/s＜1×10-3m2/s
Switching elementMicro SwitchSealed switch
Explosion-proof grade–Exed II CT4~T6
sensor
shell material		A: Galvanized steel;
B: Brass
C: Brass (corrugated tube: Viton)		A: Galvanized steel;
B: Brass
C: Brass (corrugated tube: Viton)
Enclosure ratingGrooved sealing ring IP54; O-shaped sealing ring IP65Grooved sealing ring IP54; O-shaped sealing ring IP65
Ambient temperature-20℃-40℃-20℃-40℃
Medium temperature0-100℃0-120℃
Installation locationPressure port vertically downwardPressure port vertically downward
Vibration resistance40m/s²20m/s²
Repeatability error≤2.5%≤2.5%
Contact ratingAC 220V, 6A (resistive)DC 250V, 0.25A (resistive), 60W max.
AC 250V, 5A (resistive), 1250VA max.

Set value refer to table unit: MPa

No. Corresponding setting value adjustment range Withstand voltage Corresponding dimensions
A B C A B/C A B C
1 0.3~4 0.3~4 0.3~4 16 30 1 “Normal: 02
Explosion-proof: 05″ 		Normal: 04
Explosion-proof: 07
2 0.3~6.3 0.3~6.3 0.5~6.3
3 0.5~10 0.5~10 0.5~10 30 30
4 0.5~16 0.5~16 0.5~16
5 1~25 1~25 1~25 80 30 Normal: 03
Explosion-proof: 06
6 1~40 1~40 1~40 80 60
Remarks: ① The meaning of the pressure resistance value: In actual work, even a short pressure peak cannot exceed this value.
② Type A controller has no explosion-proof type.

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How does a high pressure switch work?

Working principle:
When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantly. Push the switch connector on or off by connecting the guide rod.

When the pressure drops or rises to the rated recovery value, the disc is reset instantly. The switch resets automatically. Or simply speaking, when the measured pressure exceeds the rated value, the free end of the elastic element produces displacement, pushes the switch element directly or after comparison, changes the on-off state of the switch element, and achieves the purpose of controlling the measured pressure.

The elastic elements used in the pressure switch include a single-turn spring tube, diaphragm, bellows and bellows.

Extended reading: Miniature Pressure Switch

Featured Mechanical and electronic pressure switches

Electronic Pressure Switch YX-18
Explosion Proof Pressure Switch YX18-F
Adjustable Pressure Switch PC-400
Waterproof Pressure Switch PC-500
Low Pressure Switch Y-500

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Sino-Inst offers over 10 Electronic Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of High Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of High Pressure Switch instrumentation, located in China.

Vacuum Pressure Switch YL-802

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Vacuum Pressure Switch features a variety of diaphragm materials and adjustable pressure switch and connection options. The existing vacuum is measured via a sensor and issues an analog or digital switching signal.

YL-802 Vacuum Pressure Switch, also known as negative pressure switch, vacuum switch. The controller has delay control, reverse control, and three pressure unit switching. It can replace mechanical vacuum switches and vacuum controllers. It can be used for various vacuum levels Measurement.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

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Vacuum Pressure Switch features:

  • It can realize the function of upper limit stop and lower limit start; (also can be reversed control)
  • The start-up delay can be set to prevent the frequent start of the motor from causing damage;
  • KPA, BAR, PSI pressure unit switching;
  • One key reset function
  • With the function of pipeline leakage protection
  • Low power consumption, no more than 0.5W
  • Vibration resistance, strong anti-interference, fast response and stable performance.

Specfications of Vacuum Pressure Switch YL-802

Measuring range0~-120Kpa
Accuracy classDisplay accuracy: 0.1Kpa Control accuracy: 1Kpa
Supply voltage24V DC 220V AC (optional)
Alarm point setting-3Kpa~-120Kpa (can be set)
output signalRelay
load capacity220V 5A 24V 5A
Sampling rate5 times/sec
Operating temperature-20℃~65℃
Measuring mediumMedium that does not corrode stainless steel
Installation interfaceM20*1.5
Electrical protectionReverse polarity protection, short circuit protection (24VDC), anti-electromagnetic interference
Dial diameter80mm

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What is a vacuum pressure switch?

Vacuum switch is a switch that detects the range of vacuum degree, also known as vacuum relay.

Its function is to automatically open and close the control circuit when the vacuum degree produced in actual work reaches the specified requirements. Send an electrical signal. Command the normal operation of the vacuum suction mechanism. It belongs to reliability and safety components.

Vacuum switches are divided into three types: mechanical, semiconductor and air bridge.

Mechanical vacuum switch uses mechanical displacement to determine the change of vacuum pressure, such as diaphragm vacuum switch.

The semiconductor vacuum switch uses a semiconductor pressure sensor to detect the change of vacuum pressure, and can directly convert the detected pressure signal into an electrical signal.

The setting of the vacuum pressure switch can only be carried out under the pressure value.

For example, if you need to operate at -0.02MPa, you must vacuum the pressure gauge to -0.02MPa. Then adjust the knob of the pressure switch. Close it, and then pump to -0.03MPa and slowly release the pressure. This is repeated many times to find the -0.02MPa point.

How does a vacuum pressure switch work?

The working principle of vacuum pressure switch:

When the vacuum pressure in the system is higher or lower than the set pressure, the pressure sensor in the controller will act immediately. Make the switch contacts in the controller open or close, and the equipment stops working at this time.

When the vacuum pressure in the system returns to the pressure range set by the equipment, the pressure of the controller is reset immediately. Make the switch contacts in the controller turn on or off, and the device works normally.

  1. In fact, the vacuum switch is purely mechanical deformation that causes the micro switch to act. When the pressure increases, the vacuum switch acts on different pressure sensing components (diaphragm, bellows, piston) to produce deformation. Will move upward through mechanical structures such as railing springs. Finally, the top micro switch is activated to output the electrical signal.
  2. The setting method of mechanical pressure switch is continuous displacement type from the functional principle. The set point can be set at a single point and can reach up to 3 different set points.
  3. The vacuum switch has a variety of options for different ranges of absolute negative pressure and positive and negative pressure. While measuring the negative pressure, the vacuum switch can withstand a certain strength of positive pressure. It is widely used in the power industry.

Featured Mechanical and electronic pressure switches

Electronic Pressure Switch YX-18
Explosion Proof Pressure Switch YX18-F
Adjustable Pressure Switch PC-400
Waterproof Pressure Switch PC-500
Low Pressure Switch Y-500

You may like:

Sino-Inst offers over 10 Electronic Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Vacuum Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Vacuum Pressure Switch instrumentation, located in China.

Low Pressure Switch Y-500

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Low pressure switch adopts diaphragm sensor. The setting value of the controller is adjustable, and the adjustment range is -16KPa—2.5Mpa.

The Low pressure switch can be used for neutral gases such as air and liquid media such as water, hydraulic oil, lubricating oil, and light fuel oil. Low-pressure pressure switches are widely used in automobiles, water purifiers, power development and other fields. These fields are mainly used in low-voltage protection switches for automobiles, low-voltage switch appliances for power equipment, and low-voltage control switches used in pressure systems.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

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More Pressure Switches

Features of low pressure switch

  1. Mechanical switch, no need for power supply, easy to use
  2. There are normally open and normally closed contacts
  3. Adjustable pressure alarm point
  4. Suitable for occasions with explosion-proof requirements
  5. Easy to use, stable work and long mechanical life

Specifications of low pressure switch

Working parametersnormal typeExplosion-proof
Working viscosity＜1×10-3m2/s＜1×10-3m2/s
Switching elementMicro SwitchSealed switch
Explosion-proof grade/Exed II CT4~T6
Enclosure ratingIP65IP54
Ambient temperature-20℃~50℃-20℃~50℃
Medium temperature0~120℃0~120℃
Installation location/Pressure vertically downward
Vibration resistanceZNC-Y500: 40m/s²Max. 20m/s²
Repeatability error≤1.5%≤1.5%
Contact ratingAC 220V, 6A (resistive)DC 250V, 0.25A (resistive), 60W max.
AC 250V, 5A (resistive), 1250VA max.

Set value reference table


No. Corresponding setting value adjustment range Pressure Corresponding dimensions
B K W
1 0~2.5 (Kpa) 0~2.5 (Kpa) -16~0 (Kpa) 50(Kpa) Normal: 01
Explosion-proof: 04
2 0~6 (Kpa) 0~6 (Kpa) -10~0 (Kpa)
3 0~16 (Kpa) 0~16 (Kpa) -6~0 (Kpa)
4 0~25 (Kpa) 0~25 (Kpa) -2.5~0 (Kpa)
5 0.005~0.06 (Mpa) 0.005~0.06 (Mpa) -1.6~0 (Kpa) 1.5(Mpa) Normal: 02
Explosion-proof: 05
6 0.005~0.1 (Mpa) 0.005~0.1 (Mpa) 0~0.6 (Kpa)
7 0.005~0.16 (Mpa) 0.005~0.16 (Mpa) 0~1.1 (Kpa)
8 0.005~0.25 (Mpa) 0.005~0.25 (Mpa) 0~1.6 (Kpa)
9 0.03~0.4 (Mpa) 0.03~0.4 (Mpa) 4(Mpa) Normal: 03
Explosion-proof: 06
10 0.03~0.6 (Mpa) 0.03~0.6 (Mpa)
11 0.05~1 (Mpa) 0.05~1 (Mpa)
12 0.1~1.6 (Mpa) 0.1~1.6 (Mpa) 5(Mpa)
13 0.1~2.5 (Mpa) 0.1~2.5 (Mpa)

Remarks: ① The meaning of the pressure resistance value: even a short pressure peak cannot exceed this value.
② The corresponding external dimensions of the W-type controller are unified as ordinary: 01, explosion-proof: 04.

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Working principle of low pressure switch

When the system pressure and the rated pressure are too high or too low, the disc in the sensor will move instantaneously. Thereby, the switch joint is pushed on or off by the connected guide rod.

In short, it is compared with the rated value through the test situation of the measured pressure. When there is a change, a working effect will be produced, and the free end of the elastic element will be displaced. Push the switching element directly or after comparison. Change the on-off state of the switching element to achieve the purpose of controlling the measured pressure.

The commonly used components of pressure switches mainly include four categories: diaphragm, diaphragm, single coil spring tube and bellows.

Extended reading: Miniature Pressure Switch

The role of low pressure switch

Because pressure switches have relatively high accuracy and stable performance, low-pressure pressure switches are widely used in automobiles, water purifiers, power development and other fields. These fields are mainly applied to low-voltage protection switches of automobiles, low-voltage switch appliances of power equipment, and low-voltage control switches used in pressure systems.

Among them, in the automotive field, it means that when the voltage provided by the car to the on-board power supply is lower than how much, the power supply will automatically shut down to achieve a protection function. As a commonly used electrical component, low-voltage car switches can prevent damage to the power supply equipment of the car and ensure the normal ignition of the car.

The low-pressure switch in the pressure system achieves the working effect according to the water supply pressure of the entire system. It is mainly to cut off the entire circuit when there is no water or the pressure is too small to achieve the purpose of protecting the water pump.

More Featured Pressure Switches

Stainless Steel Pressure Switch PC-300
Adjustable Pressure Switch PC-400
Waterproof Pressure Switch PC-500
Electronic Pressure Switch YX-18
Explosion Proof Pressure Switch YX18-F

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Explosion Proof Pressure Switch YX18-F

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Explosion Proof Pressure Switches are designed for pressure control within harsh applications. The wiring contacts are sealed in a solid space through a solid sealed shell to achieve explosion-proof effect.

The explosion-proof construction provides superior protection, while its compact design allows for easy integration into custom equipment or systems. This model is ideal for pressure alarm, shutdown or control within hazardous areas when limited size and process compatibility are needed.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

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Features of Explosion Proof Pressure Switch

  1. The operating point is stable and will not be affected by shock, vibration, temperature changes or other environmental conditions.
  2. The contact will not shake due to pressure fluctuations, and the open or closed state is clear.
  3. It is not affected by the impact of the pump and the vibration fatigue of the contact.
  4. Long life, high stability and action repeatability.

Read more about: What Is the Difference Between Class 1 Div 1 and Class 1 Div 2 ?

Specifications of Explosion Proof Pressure Switch

Working viscosity<1×10-3m2/s
Switching elementMicro Switch
Ambient temperature-20℃～40℃
Medium temperature－20℃～80℃
Enclosure ratingIP66
Installation locationThe pressure port is vertically downward (allowing 15°C tilt)
Vibration resistanceMax 100m/s2
Repeatability error≤2%
Service life1×105 times
Contact ratingAC 220V 6A (resistive)
(If there are special requirements, it can be designed separately)

Extended reading: Pressure indicator transmitters

Principle of Explosion Proof Pressure Switch

The working principle of the explosion-proof pressure switch is that the micro switch action caused by pure mechanical deformation.

When the pressure increases, the different sensing pressure components (diaphragm, bellows, piston) will be deformed. They will move upward through the railing spring and other mechanical structures. The top micro switch is activated. The electrical signal is output.

The setting method is divided into continuous displacement type and force balance type from the functional principle.

According to the principle, explosion-proof pressure switches can be divided into mechanical explosion-proof pressure switches and electronic explosion-proof pressure switches. The mechanical type is divided into ordinary and sealed types.

Extended reading: Miniature Pressure Switch

Explosion Proof Pressure Switch explosion-proof grade

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Electronic Pressure Switch

Electronic Pressure Switch is a fully electronic structure. The front end adopts an oil-filled piezoresistive pressure sensor with isolation membrane. Through high-precision A/D conversion, microprocessor processing, on-site display. And output one analog quantity and four switch quantity plus 485 communication.
Extended reading: ​Solid flow meter | For bulk solids-powder-soybean-cement 

More Featured mechanical pressure switches

Miniature Pressure Switch PC-100
Manual Reset Pressure Switch PC-200
Stainless Steel Pressure Switch PC-300
Adjustable Pressure Switch PC-400
Waterproof Pressure Switch PC-500

Sino-Inst offers over 10 Explosion Proof Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Explosion Proof Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Explosion Proof Pressure Switch instrumentation, located in China.

Electronic Pressure Switch YX-18

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Electronic Pressure Switches are pressure switches with digital display.

Electronic pressure switches have electronic pressure sensors instead of mechanical pressure sensors. Electronic pressure switch integrates pressure measurement, display, output and control. The non-electricity is directly converted into voltage or current through the pressure sensor. The sensor signal is processed. Finally, it is input to the microcontroller to drive the rear circuit or control the electrical switch. The user can determine the pressure value for the action of the pressure switch.

Sino-Inst offers a variety of Pressure Switches for pressure control. If you have any questions, please contact our sales engineers.

Request a Quote
More Pressure Switches

Features of Electronic Pressure Switch YX-18

  • Multi-channel switch (with load capacity 1.2A), analog signal 4～20mA optional;
  • The pressure control switch point adjustment has no dead zone and can be set arbitrarily within the range;
  • Delay switching output time can be set by yourself;
  • Key-press adjustment and on-site setting of various parameters, easy to operate and more flexible.

Specifications of Electronic Pressure Switch YX-18

Working parameters Model
YX18-X YX18-B YX18-F
Connection method G1/4(Can be customized) M20*1.5(Can be customized) M20*1.5(Can be customized)
Output function Two switches + one analog Two switches + one analog Four switching  + one analog 
voltage External power supply: 24VDC±15% External power supply: 24VDC±15%, ripple ≤±5%; 220VAC±15% (optional)
Contact rating DC 24V—1.2A (resistive) DC 24V—1A (resistive); AC 250V—3A (resistive)
control precision ≤±0.5%FS
Control range -0.1～0～0.003～60MPa
Overload capacity 150%
Switch times 1×107
Protection level IP65
Conditions of Use Medium temperature: -30℃～85℃; Ambient temperature: -20℃～70℃;
Relative humidity: 5～85%; storage temperature: -40℃～85℃

Electronic Pressure Switch Applications

From gas mechanics to hydraulic field, precision control field, pressure automatic control field. Electronic pressure switches can replace most of mechanical pressure switches, liquid level switches, pressure relays, electric contact pressure gauges and are used in some places.

Electronic Pressure Switch for Air Compressor

Pressure switches are often used in paper machines, air compressors or pump sets. In this type of equipment, we rely on pressure switches as safety devices, alarms or control elements in the system.

Take an air compressor (referred to as “air compressor”) as an example:
An ordinary air compressor consists of three main parts: a motor, a V-type air pump and an air storage tank. The air compressor is equipped with a pressure switch, which can adjust the start and stop of the motor. By adjusting the pressure in the oil tank, the air compressor can rest .

The air compressor factory can set a certain start and stop pressure according to the requirements of different customers during the debugging process. For example, when the compressor starts, air is pumped inside.

When the pressure reaches the set value, the pressure switch will contact the contacts to stop the motor. When the pressure is lower than the set value, the air compressor starts again. Keep the pressure in the oil tank within the pressure range.

Advantages of Electronic Pressure Switch

  1. Display accuracy
    Intelligent pressure switch: 0.3%FS, 0.5%FS, 1%FS, 1.5%FS
    Mechanical pressure switch: panel display
  2. Repeatability error
    Intelligent pressure switch: less than or equal to 0.5%FS
    Mechanical pressure switch: less than or equal to 1%FS, less than or equal to 1.5%FS
  3. Shock resistance
    Intelligent pressure switch: good shock resistance
    Mechanical pressure switch: relatively poor shock resistance because it is filled with oil
  4. Setting operation
    Intelligent pressure switch: power on, the zero pressure state can be operated by pressing the button, the setting range is the full range
    Mechanical pressure switch: need to be pressurized to the specified pressure, set with a screwdriver, setting range: 20%-80%FS
  5. Contact type
    Intelligent pressure switch: PNP, NPN/solid state relay; this type of contact will not produce arcing, contact carbon deposits, etc.
    Mechanical pressure switch: micro switch, will oxidize

Extended reading: Miniature Pressure Switch

Disadvantages of Electronic Pressure Switch

The advantages of the intelligent pressure switch are mentioned above, and the disadvantages of the smart pressure switch are mainly complicated in wiring. 4 or more, need power supply to use. There may be interference when encountering strong electricity.

The pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.

Electronic pressure switches provide electronic switch output signals.

Electronic pressure switches mainly use pressure sensors for pressure sampling. The non-electricity is directly converted into voltage or current through the pressure sensor. The sensor signal is processed through the signal conditioning circuit, and finally passed through the comparison circuit. The output level is a certain logic state. This logic The level can be input to the microcontroller. Drive the rear circuit or control the electrical switch. The user can determine the pressure value of the action of the pressure switch by setting the level conversion threshold.

Electronic pressure switches are factory set to the optimum switching point or can be programmed in the field thanks to the integrated display and pushbuttons. Their integrated programmable logic allows switching points and output signals to be tailored to the application.

The numerous programmable functions of modern electronic pressure switches include hysteresis, delay time, normally closed or normally open and window functions. They also provide a constant pressure reading and indicate if the switch output is active.

Pressure switches can be divided into coil spring tube pressure switches, diaphragm pressure switches, bellows pressure switches and bellows pressure switches according to the sensing elements.

Pressure switches can be divided into mechanical and electronic smart pressure switches according to their nature.

According to the setting value, the pressure switch can be divided into: adjustable pressure switch and non-adjustable pressure switch.

Pressure switches can be divided into general pressure switches, small pressure switches, smart pressure switches, explosion-proof pressure switches, marine pressure switches, differential pressure switches, etc. according to applications.

Classification of pressure switches:

There are two types of pressure switches: mechanical and electronic. There are many kinds of mechanical pressure switches, and many kinds of electronic ones. Let’s talk about the difference between mechanical pressure switches and old and new electronic pressure switches.

The working principle of mechanical pressure switch is:

When the measured pressure exceeds the rated value, the free end of the elastic element is displaced, and the switching element is pushed directly or after comparison to change the on-off state of the switching element to achieve the purpose of controlling the measured pressure.

Generally, “electric contact pressure gauge” is used, which is an ordinary tube spring pressure gauge, plus two sets of electric contacts.

It can be connected to the electrical contacts of relatively high and low pressure, thereby controlling the pressure between the upper and lower limits. The capacity of this kind of electric contact is small, so it can only switch the control coil of the contactor, and the control position on the pressure switch can be adjusted.

The characteristics of this mechanical pressure switch are: low price, easy to use, but low accuracy, short service life, troublesome control point setting and inconvenient setting.

The working principle of the electronic pressure switch is:

The pointer pressure sensor is used to measure the pressure of the medium, and then the measured pressure is converted into a digital signal and sent to the programmable logic device PLC to control the upper and lower pressure limits. When the pressure reaches the preset pressure, the output voltage drives the motor or other controllable devices.

This kind of pressure switch has many shortcomings. Due to the use of a pointer pressure sensor, the degree is not high and the observability is poor; the entire pressure switch is expensive and has cumbersome controllability.

The new technology electronic pressure switch is designed and produced using high-precision pressure sensor and temperature compensation technology, combined with micro-processing technology and advanced analog-to-digital converter.

This pressure switch has a built-in precision pressure sensor, amplifies the pressure signal through a high-precision instrument amplifier, and collects and processes data through a high-speed MCU.

It adopts LCD or LED real-time digital display pressure, relay signal output, upper and lower limit control points can be set freely, stable and reliable, and high precision. The disadvantage is that the price is extremely high.

Mechanical pressure switches and electronic pressure switches have their own advantages, and they jointly promote the development of pressure measurement.

Extended Reading: Digital Pressure Sensor-RS485

The output of a pressure switch is a digital on-and-off signal. This signal can only have two states of on and off.

The output of a pressure transmitter, however, is an analog electrical voltage or a current signal representing 0 to 100% of the pressure range sensed by the transducer.

Electronic pressure switches are suitable for applications that require stability, multiple switch points and control flexibility. Such as control and automation equipment. They are ideal for installations that require flexible programming and adjustment, local indication displays and additional analog output signals.

The pressure switch you should use ultimately depends on your application. Electronic switches are typically used in industrial, OEM or process type applications. For high/low alarm, control, pressure monitoring and/or automation. They are also commonly used in conjunction with PLCs and other building control equipment.

Compared to mechanical switches, electronic pressure switches have a longer lifespan. They can withstand more pressure cycles. Because they have fewer moving parts, there is less wear on the diaphragm.

More Featured Pressure Switches

You may like:

Sino-Inst offers over 10 Electronic Pressure Switches for pressure measurement. About 50% of these are liquid pressure swithces, 40% is gas pressure switches.

It is widely used in hydropower, tap water, petroleum, chemical, machinery, hydraulic and other industries to measure, display and control the pressure of fluid media on site.

A wide variety of Electronic Pressure Switches options are available to you, such as free samples, paid samples.

Sino-Inst is a globally recognized supplier and manufacturer of Electronic Pressure Switch instrumentation, located in China.