The SPC Temperature/humidity transmitter incorporates two sensors in one attractive wall mount enclosure for the most efficient environmental monitoring and control system. It uses a field‑proven RH sensor to monitor relative humidity and a curve‑matched thermistor to measure temperature. Two setpoint controls are also available for temperature and humidity adjustment. The device may also include an occupancy override button and an external communication jack. Both measurements and setpoint signals are available on separate outputs as linear 4‑20 mA, 0‑5 or 0‑10 Vdc signals.