This version controls only AC powered heating or cooling devices such as a heat lamp.
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TCAT-2LV
This model provides a low-voltage DC output for electrically sensitive applications where AC frequencies might interfere with other monitoring devices.
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TCAT-2DF
This is a combination version which includes both an AC outlet for controlling primarily resistance loads such as heat lamps, AC powered warming blankets and a low-voltage, low-noise" DC output for heating pads. This version allows you to control a variety of different loads.