Differential Pressure Transmitters and Transducers

MicroSensor designs and produces differential pressure transmitters and differential pressure transducers as a pressure transmitter manufacturer since 1971. Differential pressure measurement refers to measuring the difference between two pressures to monitor and control flow rates, fluid levels, and air or gas pressure in industrial settings. Differential pressure transducer is a crucial instrument for maintaining safe and efficient operation of industrial processes.

MicroSensor provide intelligent and smart pressure transmitters for industrial process control applications in chemical plants, petroleum oil and gas fields, etc. With an intrinsic safe explosion-proof version optional, the differential pressure transmitters and transducers can be used in hazardous environments and offer stable and accurate performance. Besides, the specialized differential pressure transmitter for oxygen pressure measurement is produced and has won a good reputation among customers in the past years. Custom-design service is available with our professional R&D team.

Differential Pressure Transmitter for Process Industry

Differential pressure transmitters and transducers

Differential Pressure Transmitter for Process Industry

The below MDM7000 Series smart differential pressure transmitter adopts advanced monocrystalline silicon piezoresistive technology. The measurement range is from 60mbar to 400bar, outputs 4mA~20mADC, and HART current signal. The product measures the level, density, pressure and flow of liquid, gas or steam. It is specialized for the process industry, chemical industry, food & beverage, medicine, paper industry, etc. MDM7000 Series supports the best application solution for gauge/absolute pressure measurements.
MDM7000-DP Smart Differential Pressure Transmitter adopts high performance EMC protection circuit module with strong anti-interference ability. It supports remote setting, monitoring and other functions through communication equipment.
MDM7000-LP Smart Differential Pressure Transmitter With Remote Diaphragm Seal is suitable for the demanding process chemical industry. The accuracy is high up to 0.075%FS. It is necessary for controlling and optimizing energy use, and maintaining product quality.

Smart Differential Pressure Transmitter

Smart Differential Pressure Transmitter


Accuracy: ±0.075%,±0.05%,±0.1%URL
Range: 60mbar~100bar
Long-term stability: ±0.1%SPAN/5years
Maximum turndown ratio:100:1

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Smart Level Transmitter

Smart Level Transmitter


Range: 0.4bar~30bar
Output Signal: 4mA~20mA DC+HART
Working Temperature: -10℃ ~85℃ , -10℃ ~70℃ (with LCD display)

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Differential pressure transmitters and transducers

A series of differential pressure transmitters below are available in industries like the Petroleum industry, the Chemical industry, the Electricity industry, Hydrology, etc. to measure the differential pressure of liquids and gases. The below products are applied for differential pressure measuring which most measurement ranges are 0bar~0.35bar...35bar.
Ranging from 1kPa, the MDM492 differential pressure transmitter is suitable for tiny differential pressure measurement with stable performance in industries like boiler, vintage, and so on. With CCS ship-use certificates, a differential pressure transducer like MDM490 can be used in marine applications.
MDM4901FL is dedicated to oxygen pressure measurement, filled with Fluorinated® oil. It specializes in gas pressure measurement in medical oxygen production equipment and oxygen storage tanks.

Differential Pressure Transmitter

Differential Pressure Transmitter


Accuracy: ±0.5%FS
4~20mA DC 0/1~5V DC 0~10/20mA DC

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Differential Pressure Transmitter

Differential Pressure Transmitter


Output: mV
Accuracy: 0.25%FS
Max. static pressure 20MPa

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Differential Pressure Transmitter

Differential Pressure Transmitter


0~0.01bar / 0~0.025bar / 0~0.07bar
Accuracy: ≤1%FS
Output: 4~20mADC(2-wire)

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Differential Pressure Transmitter for Oxygen Pressure Measurement

Differential Pressure Transmitter for Oxygen Pressure Measurement


Accuracy: ±0.5%FS
Oxygen DP Measurement

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How does a Differential Pressure Transmitter Work?

The differential pressure transmitter uses a piezoresistive sensor as the sensing element, silicon oil is filled between the die and two diaphragms. When the measured differential pressure is added on the two diaphragms, the pressure could be transferred onto the die through silicon oil. The sensor die connects with an amplifier circuit through wires, and uses the semiconductor's piezoresistive effect to transform the differential pressure signal into the electric signal. Since the signal output of the Wheatstone bridge on the die has a good linear relationship with the differential pressure, the differential pressure can be accurately measured.  Industrial pressure sensors and transmitters are widely used in general and process control industries.

Where is the Differential Pressure Transmitter Used?

Differential pressure transducers and differential pressure transmitters designed and developed by Micro Sensor can provide different pressure ranges, different materials, different output signals, etc., and customized services with our professional R&D team. 

Differential pressure transmitters are widely used for differential pressure measurement. One of the applications of pressure transmitters is used in air proving and most HVAC systems. They can also be used for level monitoring in closed tanks like level transmitters. The properties of the differential pressure transmitter have made it possible for it to be used in more than one place. Check out our website to pick out quality differential pressure transducers with good prices for your industry. We have a variety to choose from and you can be sure you will get something that works for your industry.

Micro Sensor is a world-renowned supplier of pressure sensors, transmitters, and flowmeters. Stable and reliable differential pressure measurement with high accuracy has become a brand recognized by global customers. There are so many applications of the differential pressure transmitter which makes it one of the most sought-after pressure transducers in the market.

The Electrical Output of a DP Transmitter

The electrical output of a DP transmitter typically consists of a two-wire loop current or voltage signal. 

The most common signal is the 4-20mA loop signal, where the transmitter generates a current that varies linearly with the measured pressure. The 4mA~20mADC signal is a standard analog signal that is proportional to the measured parameter. For example, if the sensor is measuring pressure, the output signal will be 4mA when the pressure is low and 20mA when the pressure is high. This current signal is usually fed to a controller or a data acquisition system where it can be converted into a pressure reading in engineering units. 

Another output is the voltage signal. It ranges typically from 0-10V or 0-5V. This signal applies to the voltage inputs system. It is also used for requiring a higher resolution than the 4-20mA signal.

Different factors could affect the electrical output of a DP transmitter. So, it is important to ensure proper calibration and wiring for accurate and reliable measurements. 

MicroSensor 4mA~20mA DC+HART provides both a standard analog signal and a digital signal. They allow for accurate and remote monitoring and configuration of the instruments. 

Common Industrial Applications

Differential pressure transmitters apply to differential pressure measurement. They can also be used for level monitoring in closed tanks like level transmitters. Some common industries are listed below: 

Food and Pharmaceuticals

It plays a critical role in the quality and safety of food and pharmaceutical products by monitoring and controlling air flows in critical areas. 


Smart differential pressure transmitter conjunction with the computer control system measures pressure, flow, level, and other information in the production process, which greatly improves the production capacity of the equipment and reduces the product consumption and operating costs.


Differential pressure transmitters are commonly used in HVAC (Heating, Ventilation and Air Conditioning) systems to measure the difference in air pressure between two points in order to control the flow of air. They are typically used in applications such as:

1. Airflow measurement: Measure the airflow rate through ducts and HVAC systems.

2. Filter monitoring: Monitor the pressure drop across air filters, indicating when filters need to be changed.

3. Fan control: Control the speed of fans in HVAC systems by detecting changes in pressure that occur due to variation in air volume.

4. Balancing HVAC systems: Balance airflows in HVAC systems by measuring the differential pressure across dampers and valves.

5. Building pressurization: Maintain proper building pressure by regulating the airflow through doors and windows. 

Of course, MicroSensor always delivers high stability DP measuring equipment for oil&gas, renewable energy, chemical&pertoleum and various industries. Our smart DP transmitters have a communication function, which can carry out two-way communication in the control room, transmitter site, and other places connected with the control loop to complete the setting, monitoring, and testing of parameters.



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Contact Us

If you still can't find what you're looking for, please contact us with more details so that we can provide you with a suitable solution.


No. 18, Yingda Road,
Baoji, 721006,Shaanxi,P.R.China

German Subsidiary
Micro Sensor GmbH
Girardetstr. 6, D-45131 Essen, Germany

Tel: +86-29-88346384
Whatsapp: 15114817352
Email: sales@microsensor.cn