The Ketotek KT100 is a panel‑mount digital controller that manages both air temperature and relative humidity via a combined sensor. It provides two independent outputs: OUT1 for heating/cooling and OUT2 for humidification/dehumidification, each switched by a direct 10 A relay. Versions are available for 120 VAC or 230 VAC mains. The temperature set range is −50 to 80 °C and humidity 1–99% RH, with 1 °C/1% RH control resolution. Functions include a clear dual LED display, adjustable compressor delay (0–5 min), high/low alarms, and calibration for temperature and humidity. The module measures 100 × 55 × 32 mm with a 75 × 55 mm cutout. Typical uses include incubators, greenhouses, and reptile enclosures requiring simple on/off environmental control.