Temp Sensor for Class 1 Div 2 location

[arlena]

Can a 10K thermistor be installed in a class 1 div 2 location?  Or are there other sensor/transmitter combinations that could be installed in this environment?

It would be wired to an MPx controller outside the location.

[dano_]

Hi, you should search for an "intrinsically safe temperature transmitter", as "Class 1 Div 2" describes presence of explosive atmosphere where sensor should be installed. In EU ATEX zone 2 area. as my information there are no such offered by SE.  (its not case of sensor characteristic, its about construction of a sensor, and barrier to prevent no electric spark can appears)   

just like for example https://www.tc-atex.com/uk/

[Troy_Wecker]

A 10K thermistor itself does not act as a source of ignition.  There is no dynamic contact points or switching.

If the thermistor is part of a transmitter assembly,  then that product must be approved as suitable.  Typical Building Automation Sensors won't have that approval.

[arlena]

I  was more concerned about the input terminals of the controller (in this case an MPV).  I'm not sure of how much energy the controller input terminals are capable of supplying, but at any rate I think the controller would have to carry some type of rating or marking to make the AHJ happy.

[ezgod87]

For a school project I'm asked to design a temperature sensor with transistors exclusively.

I need to use the characteristics of a temperature-dependent transistor and implement a transistor(s) amplifier which will fix the sensitivity of the sensor.

I can only use bipolar and FET transistors, resistors and a continuous power supply +/- 15V.