The most common industrial pressure measuring instrument is the differential pressure transmitter. This equipment detects the pressure difference between two ports and produces an output signal with reference to a calibrated pressure range.
Industrial differential pressure transmitters are made of two boxes. The pressure sensing element is housed in the lower half and the electronics are housed in the upper half. It has two pressure ports marked "High" and "Low". It is not mandatory that the high port is always under high pressure and the low port always under low pressure. This labeling is related to the effect of the port on the output signal.
Industrial applications of differential pressure transmitters:
- There are unlimited industrial applications of differential pressure transmitters.
- Oil and gas flow measurement in onshore, offshore and subsea applications.
- Water and wastewater treatment plants. It is widely used to monitor filters in these plants.
- It is used to monitor sprinkler systems.
- Remote sensing of steam or hot water heating systems.
- Pressure drops in valves can be monitored.
- Water pump control monitoring.
