Introduction
Pressure measurement is one of the critical parameters in industrial systems. Various instruments such as Pressure Gauge and Pressure Transmitter are used for this purpose. Each of these devices has specific applications, and understanding their differences is essential for correct selection in industrial projects.
Structural Differences
A pressure gauge is a mechanical device that displays the pressure value directly on a calibrated dial.
In contrast, a pressure transmitter is an electronic device that measures pressure and converts it into an electrical signal (commonly 4–20 mA) to be sent to a controller or monitoring system.
Functional Differences
| Feature | Pressure Gauge | Pressure Transmitter |
| Output type | Mechanical indication | Electrical signal |
| Measurement accuracy | Medium | High |
| Application | Local monitoring | Control & automation |
| Power supply | Not required | Required |
Applications
- Pressure Gauge: For local monitoring on tanks, pumps, and simple pipelines
- Pressure Transmitter: For automation and process control systems in oil, gas, petrochemical, and power plant industries
Conclusion
If local pressure indication is sufficient, a pressure gauge is the best option. However, for transmitting data to control and monitoring systems, using a pressure transmitter is essential.
💡 Petro Tajhiz Atrin is a reliable supplier of various pressure transmitters and pressure gauges from well-known global brands such as WIKA, Endress+Hauser, ABB, and Yokogawa.