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A differential pressure transmitter is a device that measures the difference between the pressures at two points and outputs a standard signal (such as 4–20 mA or 0–5 V). Unlike a standard pressure transmitter, a differential pressure transmitter has two pressure ports. These are typically referred to as the high-pressure (HP) side and the low-pressure (LP) side. Under normal operating conditions, the pressure on the high-pressure side should be greater than that on the low-pressure side in order to obtain a measurable differential pressure.
| Model Number | AED28 |
| Accuracy | ±0.2% |
| Output signal | 4-20mA, 4-20mA+HART, ModBus RS485 |
| Power supply | 10～32VDC |
| Overload Presure Limit(OPL) | Single High Side Max 16 Mpa |
| Process Temperature | -40℃ ~ 315℃ (depending on the medium) |
| Ambient Temperature | -40℃ ~ 85℃ or -20℃ ~ 70℃(with LCD) |
| Measuring range | 0-3MPa |
| Response time | 0.25s |
| Power supply influence | ≤ ±0.005% / URL/ V |
| Protection grade | IP65 (factory default); IP67 (optional) |
| Explosion-proof grade | NEPSI Ex db IIC T6 Gb |
| Housing material | Cast aluminum alloy; SUS304 |
| Diaphragm material | SUS316L; Hastelloy C; Tantalum; SUS316L gold plated; SUS316L PTFE coating |
High accuracy: The pressure transmitter can perform high-accuracy measurements within the measurement range of 0-3MPa.
Standard accuracy: ±0.2%; no linearity adjustment is required when the positive and negative zero points migrate;
Excellent environmental adaptability: The advanced floating diaphragm box protects the sensor from the influence of temperature and overpressure, and controls the comprehensive measurement error on site to a minimum.
Excellent operability and easy usability: All ranges meet explosion-proof requirements; stainless steel transmission housing is available; various corrosion-resistant materials are available;
HART communication protocol, FOUNDATION fieldbus, and PROFIBUS bus are used for communication.
It can accurately measure pressure and convert it into a DC4~20mA output signal. It uses a silicon microcapacitive sensor and a microprocessor made by micromachining technology.
Features and functions: small, lightweight, excellent environmental adaptability, suitable for all fields.
Application fields: Double flange differential pressure transmitters are widely used in various industrial fields. Here are some common application scenarios:
1. Petrochemical: In petrochemical processes, double flange differential pressure transmitters are used to measure the pressure difference in fluid media to control flow, monitor pipeline blockage, detect leaks, etc.
2. Power engineering: In power engineering, double flange differential pressure transmitters are used to measure the pressure difference in boilers to ensure the normal operation of boilers and improve thermal efficiency.
3. Automation control: Double flange differential pressure transmitters play an important role in automation control systems. It can convert pressure differences into electrical signals for controlling and adjusting the working status of the system, such as automated process control, liquid level control, etc.
Open tank liquid level measurement: Install the instrument below the lowest measurement point, and connect the negative pressure side directly to the atmospheric pressure.
Closed tank liquid level measurement: Install the instrument below the lowest measurement point, connect the negative pressure side through the pressure pipe, and ensure that the connection point on the pressure pipe is always higher than the highest liquid level.
Gas measurement
When measuring gas, the pressure port should be opened on the side or top of the process pipeline, and the transmitter should be installed above the process pipeline so that the accumulated liquid can easily flow into the process pipeline. For transmitters with a relief valve in the pressure chamber, the relief port of the relief valve should be placed downward. In order to discharge the accumulated liquid in the measured medium.
Liquid measurement
When measuring liquid, the pressure port should be opened on the side of the process pipeline to avoid slag deposition. At the same time, the transmitter should be installed below the pressure port so that bubbles can be discharged into the process pipeline. For transmitters with a relief valve in the pressure chamber, the relief port of the relief valve should be placed upward to discharge the gas in the measured medium.
Steam measurement
When measuring steam, the pressure tapping port should be opened on the side of the process pipeline, and the transmitter should be installed below the pressure tapping port so that the condensate can be filled in the pressure pipe.
A differential pressure transmitter is a device that measures the difference between the pressures at two points and outputs a standard signal (such as 4–20 mA or 0–5 V). Unlike a standard pressure transmitter, a differential pressure transmitter has two pressure ports. These are typically referred to as the high-pressure (HP) side and the low-pressure (LP) side. Under normal operating conditions, the pressure on the high-pressure side should be greater than that on the low-pressure side in order to obtain a measurable differential pressure.
| Model Number | AED28 |
| Accuracy | ±0.2% |
| Output signal | 4-20mA, 4-20mA+HART, ModBus RS485 |
| Power supply | 10～32VDC |
| Overload Presure Limit(OPL) | Single High Side Max 16 Mpa |
| Process Temperature | -40℃ ~ 315℃ (depending on the medium) |
| Ambient Temperature | -40℃ ~ 85℃ or -20℃ ~ 70℃(with LCD) |
| Measuring range | 0-3MPa |
| Response time | 0.25s |
| Power supply influence | ≤ ±0.005% / URL/ V |
| Protection grade | IP65 (factory default); IP67 (optional) |
| Explosion-proof grade | NEPSI Ex db IIC T6 Gb |
| Housing material | Cast aluminum alloy; SUS304 |
| Diaphragm material | SUS316L; Hastelloy C; Tantalum; SUS316L gold plated; SUS316L PTFE coating |
High accuracy: The pressure transmitter can perform high-accuracy measurements within the measurement range of 0-3MPa.
Standard accuracy: ±0.2%; no linearity adjustment is required when the positive and negative zero points migrate;
Excellent environmental adaptability: The advanced floating diaphragm box protects the sensor from the influence of temperature and overpressure, and controls the comprehensive measurement error on site to a minimum.
Excellent operability and easy usability: All ranges meet explosion-proof requirements; stainless steel transmission housing is available; various corrosion-resistant materials are available;
HART communication protocol, FOUNDATION fieldbus, and PROFIBUS bus are used for communication.
It can accurately measure pressure and convert it into a DC4~20mA output signal. It uses a silicon microcapacitive sensor and a microprocessor made by micromachining technology.
Features and functions: small, lightweight, excellent environmental adaptability, suitable for all fields.
Application fields: Double flange differential pressure transmitters are widely used in various industrial fields. Here are some common application scenarios:
1. Petrochemical: In petrochemical processes, double flange differential pressure transmitters are used to measure the pressure difference in fluid media to control flow, monitor pipeline blockage, detect leaks, etc.
2. Power engineering: In power engineering, double flange differential pressure transmitters are used to measure the pressure difference in boilers to ensure the normal operation of boilers and improve thermal efficiency.
3. Automation control: Double flange differential pressure transmitters play an important role in automation control systems. It can convert pressure differences into electrical signals for controlling and adjusting the working status of the system, such as automated process control, liquid level control, etc.
Open tank liquid level measurement: Install the instrument below the lowest measurement point, and connect the negative pressure side directly to the atmospheric pressure.
Closed tank liquid level measurement: Install the instrument below the lowest measurement point, connect the negative pressure side through the pressure pipe, and ensure that the connection point on the pressure pipe is always higher than the highest liquid level.
Gas measurement
When measuring gas, the pressure port should be opened on the side or top of the process pipeline, and the transmitter should be installed above the process pipeline so that the accumulated liquid can easily flow into the process pipeline. For transmitters with a relief valve in the pressure chamber, the relief port of the relief valve should be placed downward. In order to discharge the accumulated liquid in the measured medium.
Liquid measurement
When measuring liquid, the pressure port should be opened on the side of the process pipeline to avoid slag deposition. At the same time, the transmitter should be installed below the pressure port so that bubbles can be discharged into the process pipeline. For transmitters with a relief valve in the pressure chamber, the relief port of the relief valve should be placed upward to discharge the gas in the measured medium.
Steam measurement
When measuring steam, the pressure tapping port should be opened on the side of the process pipeline, and the transmitter should be installed below the pressure tapping port so that the condensate can be filled in the pressure pipe.
About ARTang
ARTang is a global leader in measurement instrumentation, services and solutions for industrial process engineering that energizes the transformation of society and industry to achieve a more productive, sustainable future. We provide process solutions for flow, level, pressure, analytics and digital communications, optimizing processes in terms of economic efficiency, safety & environmental impact.