Buck Research Instruments' 1011C Aircraft Hygrometer is a complete chilled mirror optical dew point system for monitoring atmospheric dew and frost points. It provides three stages of thermoelectric cooling, and can reach frost points as low as -60 to -90 °C, depending on mounting configuration and operating conditions. No auxiliary coolants are required.
Included in the 1011C system are:
A water excluding inlet probe and a pressure tap for monitoring static pressure
A cockpit digital display with resolution to 0.1 °C is provided
An analog and RS-232 outputs for recording
Complete reworking of the 1011B formerly manufactured by Buck Research Instruments under license from General Eastern Instruments