Measure & Control Solutions

SI-PCM261 Submersible Pressure Transducer

Submersible pressure transducer with 4-20ma is a conventional liquid level measurement sensor. Such as water cans. Cable 0m ~ 300m, minimum range 0.5m.

SI-PCM261 Submersible Pressure Transducer

Submersible pressure transducer with 4-20mA output is Hydrostatic Level Sensor for level measurement. Submersible pressure transducer is based on the measured liquid static pressure proportional to the height of the liquid Principle. Convert static pressure into electrical signal. After temperature compensation and linear correction. Convert into standard electrical signal. Generally 4 ~ 20mA / 1 ~ 5VDC. It can also be called “static pressure liquid level gauge, liquid level transmission Device, liquid level sensor, water level sensor “. Bullet, cage, and flush tip models are available. Applications include pumps, downhole, oil tanks, lime slurry, and water tanks. There is a miniature submersible transmitter that is low power voltage.

Sino-Inst offers a variety of Submersible pressure transducer with 4-20mA for industrial level measurement. If you have any questions, please contact our sales engineers.

Features of SI-PCM261 Submersible Pressure Transducer

SI-PCM261 Submersible Pressure Transducer
  • Linear deviation is less than 0.02%
  • Accuracy over temperature range exceeds ±0.01 ft (3 mm) of water
  • Stainless steel sensor diaphragm, ballast, and casting
  • Polyurethane vented sensor cable is durable and rugged
  • Dry air moisture barrier system provides atmospheric compensation
  • No on-site calibration required

Specifications of Submersible Pressure transmitter

RangeVarious ranges from 0 ~ 0.5m to 0 ~ 300m
Measuring mediumOil, water and other media compatible with 316 stainless steel
Accuracy0.5% FS (standard type); 0.2% FS; 1.0% FS
Pressure overload200%
Protection levelIP65
Power supply24VDC (15 ~ 36VDC)
Output4 ~ 20mA , 1 ~ 5V
Temperature drift-10 ℃ ~ 50 ℃ <0.5% FS; -20 ℃ ~ 85 ℃ <1.0% FS
Insulation resistance> 100MΩ at 500VDC
Anti-electromagnetic / RF interference30V / m, 10KHz to 500MHz
Long-term stability<0.2% FS / year
Compensation temperature0 ℃ ~ 50 ℃
Operating temperature0 ℃ ~ 70 ℃
storage temperature-40 ~ 100 ℃
Shock / vibration resistance100g, 10ms / 10g, 10 ~ 2000Hz
Pressure transmission diaphragm material316 stainless steel
Probe housing material1Cr18Ni9Ti
Cable sheath materialPolyethylene or polyamide
Sealing materialNitrile rubber
Junction box housing materialCast aluminum, surface sprayed
Explosion-proofEx IaII CT6; Ex IaII BT4
Protection levelIP68

You may like: Explosion Proof Pressure Transmitter for Hazardous locations

If you are measuring the fuel tank level, you can choose a magnetostrictive liquid level sensor with higher accuracy and longer service life.

Applications of Submersible Pressure transducer

Submersible pressure transducers are designed for measuring ground and surface water pressure, temperature and water level. The Sino-Inst submersible pressure transducer can send data up to 1000 feet (304.8 m) long.

The submersible pressure transducer is suitable for a wide range of applications. Urban water supply and drainage. Sewage treatment, water tanks. Oil tank oil tanks, hydrogeology, reservoirs, rivers and oceans and other fields. The compact structure, simple change and flexible installation method provide users with convenience for submersible pressure transducer. 4 ~ 20mA, 0 ~ 5v, 0 ~ 10mA and other standard signal output methods are selected by users according to their needs.

If you need to measure the liquid level of the ground tank, you can refer to the pressure level sensor.

Submersible pressure transducer installation

Precautions for the use and installation of the submersible level sensor:

1. When the liquid level transmitter is transported and stored, it should be restored to the original packaging and stored in a cool, dry and ventilated warehouse.

2. If an abnormality is found during use, turn off the power supply. Stop using it, and check it.

3. Connect the power supply according to the wiring instructions.

How to install the submersible level sensor ?

Total Time:

The ground terminal of the input liquid level gauge should be reliably grounded. The power shield should be connected to it.

When the transmitter is installed on the side, the bending radius of the air guide cable should be greater than 10 cm. Avoid excessive bending to damage the air guide cable.

In the occasions with large vibration. Wire can be wrapped around the transmitter. Use steel wire for shock absorption. So as not to break the cable.

The installation direction of the transmitter is vertical. The input installation position should be far away from the liquid inlet and outlet and agitator.

When measuring the level of flowing or agitated liquid. Usually the steel pipe with inner diameter Φ45mm is fixed in water. Then put the input level gauge into the steel pipe and use it. Make small holes at different heights on the opposite side of the liquid flow direction, so that the water can enter the pipe smoothly.

When the liquid level gauge is installed in a stationary deep well or pool, the steel pipe with an inner diameter of about Φ45mm is usually fixed in the water. Then put the input level gauge into the steel pipe and use it. Make small holes at different heights to allow water to enter the pipe.

When the medium fluctuates greatly and the air guide cable is very long. The probe should be fixed with a sleeve to prevent the probe from swinging and affecting the measurement accuracy.

Sludge, oil residue and other substances are easily deposited in the tank bottom or bilge. It is recommended to move the measuring probe at a certain height away from the bottom of the tank (cabin). In order to avoid debris blocking the probe.

If there is any problem with the submersible pressure transducer during use. You can call the Sino-Inst staff to get a timely solution.

If you need a portable instrument, we also provide Portable Ultrasonic Water Depth Gauge for water depth measurement.

What is a submersible pressure transducer?

Submersible pressure transducer is a hydrostatic pressure sensor. Because it can be put into water, the liquid level can be calculated by measuring the underwater static pressure, so it is also called throw-in water level transmitter / level transmitter / level sensor / level gauge. Submersible pressure transducer is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. Use advanced isolated diffused silicon sensitive element or ceramic capacitor pressure sensitive sensor. Convert static pressure into electrical signal. After temperature compensation and linear correction. Converted into standard electrical signals (such as 4 ~ 20mA, etc.). Equipped with 2088 indicator head can also realize real-time display of on-site water level.

Precise level and temperature measurement with HART®communication

Measurement uncertainty of max. 0.5 %, long-term drift of 0.1 %.

And slight temperature errors make the SI-PCM261 a reliable measurement solution, for the monitoring of storage tanks and bodies of water.

The additional analog temperature output facilitates the compensation of a temperature-induced density error especially at temperatures of up to -40 … +80 °C [-40 … +176 °F].

The integrated HART® communication can be used for scaling the measuring range, and for the parameter isolation of unit, error signal, and others.

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Why we use the 4 20mA in transmitting signal?

Why is it 4/20 mA?

The reason for using a current signal is that it is less susceptible to interference. And the internal resistance of the current source is infinite. The wire resistance is connected in series in the loop without affecting the accuracy. And it can be transmitted over ordinary twisted pairs for hundreds of meters.

Due to explosion protection requirements, the upper limit is 20 mA: the spark energy caused by a current interruption of 20 mA is not sufficient to ignite the gas.

The reason why the lower limit is not set to 0mA is to detect a disconnection. During normal operation, the value will not be lower than 4mA. And when the transmission line is disconnected due to a fault, the loop current will drop to 0.

Usually, 20mA is used as the disconnection alarm value. There are two more reasons.
One reason is to avoid interference.
Another reason is that the two-wire system uses 4-20 mA of current. That is, the two wires are the signal line and the power line. The 4 mA is used to provide the quiescent operating current of the circuit for the sensor.

Optimized electronics for battery operation

The modern electronic system guarantees not only a high accuracy in the long term. But also ensures a very long battery life thanks to the low power supply, low current consumption, fast response time and low-power output signals.

Safety also in hazardous areas

The optional intrinsically safe electronic system is authorized, according to the common international standards. And allows a safe worldwide application in explosive gases and vapours.

If you want buy Wika ls-10 submersible pressure sensor, you can contact us. Sino-Inst also agent for WIKA in China. If you want find the pressure sensor for liquid level measurement, to replace the WIKA, our submersible hydrostatic level transmitter, is your best choice.


What is a pressure transducers?

The mechanical structure of Submersible pressure transducer is highly resistant to overload and corrosive media. Submersible pressure transducer has excellent sealing and anti-corrosion properties. It can be directly put into liquids (including corrosive liquids) such as water and oil for medium to long-term use. The shell and cable of PTFE material can measure a variety of highly corrosive liquids.

Do you have lighting protection?

Yes. We have. Lightning protection type Submersible pressure transducer is an outdoor type liquid level transmitter used in industrial fields that is free from frequent high-voltage overvoltage during lightning strikes and limits freewheel time and freewheeling value. The product is based on the principle that the measured static pressure of the liquid is linearly proportional to the height of the liquid level. The temperature drift is small and the accuracy is high. Imported diffused silicon sensor with long-term stability and embedded special anti-surge circuit technology. Thereby, the linear relationship between the output signal and the liquid depth is converted into a standard signal output, and accurate measurement of the liquid depth is realized. It can be widely used in water plants and sewage treatment plants with frequent lightning and surge currents.

What is the max depth?

For ordinary liquid level measurement, the range of 0m ~ 300m can already meet the needs of users. For deep well water level measurement, we can use our Deep Well Water Level Sensor, up to 1000 meters. Also supports customer customization.

Sino-Inst offers over 50 Submersible Pressure Transducer products.

About 50% of these are Submersible Pressure Transducer, 40% are Differential Pressure Gauge, and 40% are Diaphragm Seal Pressure transmitters.
A wide variety of  Submersible Pressure Transducer options are available to you, such as free samples, paid samples. 

Sino-Inst is a globally recognized supplier and manufacturer of 
Submersible Pressure Transducer, located in China. Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. Submersible Pressure Transducer products are most popular in Domestic Market, Southeast Asia, and Mid East. 

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

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