Digital Temperature Controller / Temperature Control Switch Why this controller helps Precise temperature control for processes that require stable heating or cooling. Eliminates manual monitoring and reduces temperature-related product loss or equipment stress. Compact and easy to install, suitable for many domestic, laboratory, and light industrial uses. Key features and specifications Power and output: AC110-220V supply, 10A relay output capable of switching heating or cooling devices up to 10A. Measurement range and accuracy: -50 to 110 °C with 0.1 °C display resolution for fine control. Sensor: Uses an NTC thermistor for accurate, fast temperature measurement; sensor is waterproof for wet environments. Display and indicators: LED digital display shows measured temperature clearly; separate Heat and Cool indicator lights show active mode. Size: 60 mm x 45 mm x 31 mm (2.36 in x 1.77 in x 1.22 in) (L x W x H), compact panel or enclosure mounting. Function: Automatic switching between heating and cooling modes based on the set temperature; can be used to trigger either heating or cooling equipment. How it operates Simple setpoint control: set the desired temperature; the controller continuously monitors the NTC sensor and switches outputs automatically. Heating logic: when measured temperature is less than or equal to the set temperature, the controller enables heating and the Heat indicator lights. When measured temperature is greater than or equal to the set temperature, heating is turned off. Cooling logic: when measured temperature is greater than or equal to the set temperature, the controller enables cooling and the Cool indicator lights. When measured temperature is less than or equal to the set temperature, cooling is turned off. One unit controls either heating or cooling equipment as required and provides clear status via the LED display and indicator lights. Compatibility and installation notes Compatible with most heating and cooling devices that run on AC110-220V and draw 10A or less. Intended for use where an external NTC waterproof thermistor sensor can be placed to monitor the target temperature. Compact form factor fits small control panels or enclosures; wiring and mounting should follow local electrical codes and device ratings. Practical applications (examples) Home brewing: maintain mash and fermentation temperatures precisely to improve consistency and product quality. Aquariums and terrariums: control heaters or chillers to protect aquatic and reptile life from temperature swings. Greenhouses or cold storage: automate heating or cooling to protect plants or produce against temperature extremes. Also suitable for refrigerators, freezers, HVAC sub-systems, laboratory equipment, and many light industrial processes that require precise temperature regulation. Performance and reliability Accurate NTC measurement and 0.1 °C control resolution provide tight temperature control. Waterproof thermistor allows use in humid or wet conditions. 10A relay delivers reliable switching for typical domestic and small industrial heating/cooling loads. Operation summary Set desired temperature, connect sensor to the measurement point, and wire the device to the AC110-220V supply and the heating/cooling load (within 10A). The controller will automatically activate heating or cooling as needed, showing status on the LED display and indicator lights. Specifications (concise) Power: AC110-220V Relay rating: 10A Temperature range: -50 to 110 °C Resolution/accuracy: 0.1 °C Sensor type: NTC thermistor (waterproof) Size: 60 x 45 x 31 mm (2.36 x 1.77 x 1.22 in) (L x W x H)