Foxboro RTT15S temperature transmitters feature large, backlit LCDs with optical buttons operable through the glass cover of the explosion-proof housing, so they can be configured and operated even in hazardous locations without shutdown. These HART units accept thermocouple, RTD, and ohm or millivolt sources. Automatic calibration continuously checks zero and full-scale outputs against factory calibration, and self-adjusts without interrupting output signals.
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