The Weinschel/Tegam F1109N Temperature Controlled Coaxial RF Power Transfer Standard enable the precise measurement of microwave power in the 100 MHz to 18 GHz frequency range. These units are extremely rugged, highly accurate, and stable with time and temperature. They are ideal for use as standards for the transfer of calibration factors to RF power sensors. These models are designed for use with DC self-balancing bridges such as the Weinshel/Tegam Model 1806A and 1804 or the 1830A which is Direct Reading Thermistor Power Meter. The Model F1109N is a feedthrough Thermistor Standard and Power Splitter combination used for the calibration of thermistor, thermocouple, and diode power sensors.