Explosion Proof Pressure transmitter refers to a pressure sensor with explosion-proof or intrinsically safe housing. Suitable for hazardous and explosive areas.

Explosion-proof Pressure Transmitter

Explosion Proof Pressure transmitter, or explosion-proof pressure transducer, with the explosion-proof enclosure. For applications in hazardous areas. Class I, Division 1. Flameproof ExdIIBT5Gb; Intrinsically safe ExiaIICT4/T5/T6Ga.
SIEP489 has flexible pressure calibration, push-button configuration, and programmable using HART® Communication. All our electronic pressure transducers can be offered with Explosion-proof. Select explosion-proof pressure transmitters with Ex d certification and 4-20mA output signals for installation.

Sino-Inst offers a variety of Explosion-proof pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Features of Explosion Proof Pressure Transmitter

  • FM approved as “explosion-proof” for class I, div. 1 hazardous areas
  • Available with EXD approval “flameproof enclosure” for II 2 G Ex d II C
  • Current or voltage output
  • Designed for harsh ambient conditions
  • Low-power version available as an option

Specifications of SIEP489 explosion-proof pressure transmitter:

Standard range
Pressure typeGauge pressure, absolute pressure, sealing pressure
Pressure range (bar)1 1.6 2.5 4 6 10 16 25 40 60 100 160 200 250 300 400 500 600 750 1000 1500
Pressure range (psi)15 30 50 75 100 200 300 500 750 1K 1.5K 3K 5K 10K 12K 15K 25K
Technical Specifications
Accuracy±0.3 %FS    ±0.5 %FS
Long-term stability (1 year)±0.25 %FS
Response frequency (-3DB)3.2kHz
Temperature compensation-20~+85℃
Storage temperature-40~+125℃
Load ResistanceVoltage output: RL > 100KΩ, current output: RL≤ (supply voltage-9V) / 20mA
Overload pressure150% FS (Range < 6Bar) 300% FS (Range≥6Bar)
Destruction pressure200% FS (Range < 6Bar) 500% FS (Range≥6Bar, limit 10000Bar)
Mechanical vibration±20g
Shock (11mS)100g
Protection levelIP65
material17-4PH (Range≥6Bar) 304 or 316L (Range <6Bar)
Electrical connectionsDirect lead
Pressure interfaceM20X1.5   G1 / 4       NPT1 / 4 (others can be customized)
Explosion-proof gradeExd II CT6 Gb
Signal output4~20 mA0.5 ~ 4.5VDC (proportional output)0.5~4.5VDC0~5VDC0~10VDCRS485RS232
Signal line specifications2 Wire3 Wire3 Wire3 Wire3 Wire4 Wire4 Wire
Supply voltage9~30VDC5VDC9~30VDC9~30VDC15~30VDC9~30VDC9~30VDC

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

explosion-proof pressure transmitter drawing
Explosion proof pressure transmitter drawing

Applications of explosion proof pressure transmitter

Oil & Gas equipment needs a pressure transducer, that is reliable and able to withstand extreme environmental and pressure conditions.

  • Borehole monitoring
  • Oil Field Equipment
  • Refineries and petrochemical industry
  • Drilling platforms and pipelines
  • Upstream Oil and Gas Production
  • Natural Gas Compression and Transfer Control
  • Alternative Energy     
  • Industrial and OEM Applications

We can provide maintenance, calibration and other services of the same type of products. Such as WIKA, Rosemount pressure transmitter.

Contact us now to see how we can help you with a pressure gauge solution that fits your exact needs.

Know More About Explosion proof pressure transmitter

Explosion-proof pressure transmitters are available in a wide range of specifications,
easy to install and use, safe and explosion-proof.
They can be widely used in petrochemical, electric power, metallurgy, pharmaceutical, food processing, and other industries.

Products comply with the “IEC” standard, and explosion-proof pressure transmitters are internationally renowned.

The company’s high-precision, high-stability pressure sensor components,
through high-reliability amplifier circuit and precise temperature compensation,
convert the absolute or gauge pressure of the measured medium into 4~20mA, 0~5VDC, 0~10VDC, and 1~5VDC. Such as standard electrical signals.

High-quality sensors hermetically sealed soldering technology
and a complete assembly process ensures excellent quality and performance.
The product is available in a variety of interface styles.
And a variety of lead styles to best meet customer needs.
And is suitable for use with a variety of measurement and control equipment.

Explosion proof pressure transmitter working principle

The explosion-proof pressure transmitter consists of an integrated intelligent sensor and peripheral circuits.

The sensor part is composed of a pressure sensor, a signal modulation circuit, a dedicated digital processing chip, a temperature sensor, and data memory, and the peripheral electronic circuit part is composed of an LCD display, function keys, and an EMC circuit.

The pressure signal is converted into an electrical signal by the pressure sensor. And the electrical signal is modulated. And sent to a dedicated digital processing chip for data processing.
And then converted into a 4~20 mA output signal corresponding to the pressure signal.
And the HART digital signal is superimposed on the current signal for communication.

Extended reading: How to calibrate HART pressure transmitters

Potentially explosive environment.

Such as flammable gas, dust environment, oil refinery, petrochemical plant, gas station, gas station, etc., explosive gas environment.

Under atmospheric conditions, a mixture of combustible substances in the form of gas, steam or mist, and air. After being ignited in the mixture, the combustion will spread throughout the environment of the unburned mixture.

Such as CH4, C2H2, C2H4, NH3, CO, C2H5OH, and other explosion-proof electrical equipment.

Read more about Steam pressure transmitter-Pressure measure on steam pipeline 

Intrinsically safe VS explosion-proof

The explosion-proof of the current pressure transmitter: mainly two forms of isolation explosion-proof and intrinsically safe explosion-proof.

Intrinsically safe explosion-proof:

“i” (Intrinsically safe electrical equipment and related equipment) Intrinsically safe circuits, circuits that cannot ignite the specified explosive gas or steam under the specified test conditions, under the specified test conditions, the electric sparks and thermal effects generated under the specified fault state . Intrinsically safe electrical equipment: All circuits are intrinsically safe electrical equipment.

Example: Intrinsic Safety: Ex ia II BT4


It refers to the electrical equipment that encloses the components that can ignite the explosive mixture in a shell, and the shell can withstand the explosive pressure of the internal explosive mixture and prevent the explosion of the surrounding explosive mixture.

For example: Flameproof: Ex d II CT6

Ex(ia)ⅡC T6:

Explosion-proof declarationExMeet certain explosion-proof standards, such as my country’s national standards
Explosion-proof methodiaAdopt ia-level intrinsically safe explosion-proof method, can be installed in О area
Gas categoryIl cIt is allowed to involve IIC explosive gas
Temperature groupT6The surface temperature of the instrument does not exceed 85℃


Explosion-proof declarationExCompliance with European explosion-proof standards
Explosion-proof methodiaAdopt ia-level intrinsically safe explosion-proof method, can be installed in О area
Gas categoryll cIt is allowed to involve explosive gas of IIc

Technical Support

Explosion-proof differential pressure transmitter

Explosion-proof differential pressure transmitter is used to measure the liquid level, flow rate and pressure of liquid, gas or steam under high working pressure environment. Then converted into 4 ~ 20mA DC signal output. Intelligent type can communicate with HART Communicator.


Steam pressure transmitter

High Temperature Pressure Transducer/Transmitter for measuring pressure in hot environments. Liquids or gases up to 850 ° C. Such as steam, food processing & engine monitoring.

Application of high temperature pressure transmitter in steam pipeline.


Water pressure transmitter

Liquid level sensors also called a water pressure sensor, or water pressure transducer. SI-10 liquid pressure sensor uses waterproof device to achieve IP68 waterproof rating. Like: water pipe pressure, oil pressure for pipe or tank.SI-10 liquid pressure sensor is a piezoresistive silicon pressure sensor. 


Natural gas pressure transducer

Gas pressure sensor for industrial gas pressure monitoring. Pagoda gas nozzle Φ8. Such SI-503K Pagoda Joint Gas Pressure sensor uses stainless steel as a whole. High-precision strain gage and advanced technology. It has high sensitivity, stable performance and good impact resistance.


Sino-Inst offers over 20 Explosion Proof Pressure Transmitters. A wide variety of  Pressure sensors options are available to you. Such as free samples, paid samples. 

Sino-Instrument is a globally recognized manufacturer of Pressure sensors, located in China. Sino-Instrument sells through a mature distribution network that reaches all 30 countries worldwide. 

Pressure sensors products are most popular in Europe, Southeast Asia, and Mid East. You can ensure product safety by selecting from certified suppliers. With ISO9001, ISO14001 certification.

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