4-20 mA Sensors

4-20 mA sensors are the most commonly used analog output sensor type in industrial plants for machine health monitoring and process control applications. Thanks to their loop-powered design, they do not require an external power supply and can be directly connected to PLC, DCS, and SCADA systems.

Advantages of Loop-Powered Sensors

The 4-20 mA output is a reliable and noise-tolerant solution for long-distance signal transmission in industrial environments. It provides continuous data transmission in condition monitoring systems.

• PLC compatible analog output
• Loop powered design requiring no external power
• Design suitable for industrial automation
• Ideal for continuous monitoring systems

Application Areas

It is used for continuous monitoring of vibration levels in rotating equipment such as pumps, motors, fans, gearboxes, and compressors. If you are looking for mV/g output sensors to be used with a vibration analyzer, you can check our Dynamic Output Vibration Sensors category.

Should You Choose a 4-20 mA Sensor or an mV/g Sensor?

In industrial applications, sensor selection varies depending on the intended use. 4-20 mA sensors connect directly to PLC and SCADA systems, providing continuous monitoring. Therefore, they are preferred in process control and online condition monitoring applications.

Dynamic sensors with mV/g output are used with a vibration analyzer and allow for detailed frequency analysis. They are suitable for predictive maintenance and fault analysis.

For continuous system integration, 4-20 mA sensors should be preferred, while mV/g sensors should be preferred for detailed analysis.

Frequently Asked Questions

What is a 4-20 mA sensor?

A 4-20 mA sensor is an industrial sensor type that transmits the measured physical value as an analog current signal and can be directly connected to PLC systems.

What does loop-powered sensor mean?

Loop-powered sensors do not require an external power supply and receive power via the signal line.

What is the difference between an mV/g sensor and a 4-20 mA sensor?

While mV/g sensors are used with vibration analyzers, 4-20 mA sensors are suitable for continuous monitoring and automation systems.

In which areas are 4-20 mA sensors used?

They are used to monitor vibration levels in pumps, motors, fans, compressors, and gearboxes.

Atlas HCS offers sensors suitable for industrial facilities.