United Detector Technology, UDT 21A Power Meter Model, 121A Optical Watt Meter

United Detector Technology UDT 21A Power Meter – Model 121A, Serial #73067 This measures approximately 8 1/2" wide, 10 3/4" deep, and 4" tall The front panel features a bright LED numeric display, offset control, range selector dial, and input port. The rear includes an analog output connection, selector knob, and a voltage switch for 115/230V operation. It also retains original calibration seals. Specifications as labeled on the unit include Model 121A, Serial Number 73067, 115V AC input, analog output connection, and manufacture by United Detector Technology, Inc., Santa Monica, California, USA. When plugged in, the display powers on and shows a reading (see photos), though the unit has not been fully tested for accuracy or calibration. It is being sold as is. The cord and plug are intact, and the housing shows typical cosmetic wear from lab use.
This is free shipping to the Continental United States.

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