Temperature indicator from ira rh uses the proven thin film polymer capacitive type relative humidity sensor for rh measurement and pt-100 rtd for temperature measurement and works in the temperature range from 0ºc to 150ºc with excellent response time varying from 30 secs to 2 minutes, depending on the point of measurement. State-of-the-art electronic circuit design guarantees long term stability under extremes of temperature conditions. The sensor is protected from external atmospheric condition with a fine wire mesh filter. The company also supplies humidity transmitters and controllers.