Find a Reliable Temperature Sensor for Cold Environments - 200K Capable!

[ondross]

Does anyone know where I can purchase a temperature sensor that can operate at 200K? Thermistors and thermocouples all seem to fail around 223K.

 

[schip666!]

Platinum RTD sensors are one option. Here's the first supplier I found on google:
http://www.omega.com/prodinfo/rtd.html

 

[f95toli]

Lakeshore is the biggest supplier of low-temperature sensors.
You can also have a look at Scientific Instruments website
(among many others)