Long-Distance High-Speed Transmission Capability Electric Pressure Transmitter
An electric pressure transmitter refers to a pressure transmitter that is powered by an external DC or AC power supply and converts the measured pressure into a standard DC current or voltage signal for output.
| Characteristics | Electric Pressure Transmitter | Pneumatic Pressure Transmitter |
|---|---|---|
| Drive Energy | DC 24V power supply | Clean compressed air (air source, typically ~140kPa) |
| Output Signal | 4-20mA, 0-10V, etc. electrical signals | 20-100kPa (3-15psi) pneumatic signals |
| Signal Transmission | Electrical signals, fast, long distance, capable of digital communication. | Pneumatic signals transmitted through pipes, slow (speed of sound), with delay and attenuation, limited distance. |
| System Complexity | Just wiring is needed, system is simple. | Requires a clean and dry instrument air system (air compressor, dryer, filter, piping), complex and expensive. |
| Accuracy and Response | High accuracy, fast response. | Relatively low accuracy, slow response. |
| Intrinsic Safety | Requires dedicated intrinsically safe or explosion-proof design in hazardous areas. | Naturally has intrinsic explosion-proof characteristics, suitable for flammable and explosive hazardous locations. |
| Modernity | Definitely the mainstream in modern automation systems. | Primarily found in old factories, specific safety scenarios (such as some old units in oil refineries), or special environments with strong electromagnetic interference. |
Electric pressure transmitters represent the modernization, electrification and digitalization direction of industrial process measurement and control. By adopting a unified electrical signal standard, they solve the core issues of long-distance, high-fidelity, high-speed signal transmission and direct interface with computer control systems.