The Model SIM-12H is a heated, 2-stage sensor with 65ºC (117ºF) of depression capability. It is designed for high dew point applications up to 85ºC (185ºF). For dew point measurements above ambient temperature, all components that come in contact with the sample gas must be heated to a temperature above the dew point, in order to prevent condensation and unreliable readings. For information on the Model HSS-12 heated sampling system, for use with the Model SIM-12H, refer to the Sampling Systems group on the Chilled Mirror Index page.