Barriers for Pressure Sensors, Temperature Sensors, and Solenoids.

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Thread Starter

Shailesh09

Hello!

refer my below query regarding requirement of barriers in safe area.
Suppose Compressor system will be kept in hazardous area (gas group IIA/IIB) & relay based starter cum control panel will be in safe area. Pressure sensors, temp sensors & solenoids will be mounted on compressor system.

Do I need to use safe area barriers for the pressure & temp.sensors (4-20mA) at panel incoming? reason? & whether these are also required for solenoid valves (24 v dc) reason?

please guide me.

Thanks in advance.

regards,
Shailesh
 
I think using barriers assumes the field device can be made intrinsically safe, I'm not sure solenoids fall into that category.

90% of my work is in Hazardous locations but I haven't bought a barrier in years.
 
You should make sure that you only use barriers and sensors together whose safety-related data and function-related data match each other.
 
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