Waterproof Sensor Digital Thermostat

This digital thermostat integrates a waterproof temperature sensor for consistent performance in damp or condensing environments such as greenhouses, reptile enclosures, or brewing setups. Its compact plastic housing measures 92 × 58 × 32 mm and weighs 120g. The controller supports a full operating range of -40°C to 110°C, displayed clearly on an HD LCD screen and adjusted using four tactile buttons. It uses a robust 30A relay rated for 220V AC, making it suitable for controlling large heating or cooling devices including refrigerators, brooders, incubators, fermenters, and HVAC components. In heating mode ('H'), the relay energises when the sensed temperature drops to or below the set point minus hysteresis; in cooling mode ('C'), it activates when temperature rises to or above the set point plus hysteresis. Advanced functionality includes programmable delay start ('OPH') to enforce minimum off-time between cycles — protecting compressors and extending equipment life. Temperature correction ('OFE') allows fine-tuning of readings from -10.0°C to +10.0°C to offset long-term measurement deviation. A dedicated high-temperature alarm sounds and flashes while simultaneously disabling the relay output until manually reset — ensuring fail-safe thermal protection.