W1209 DC 12V Digital Thermostat

12V DC Low-Voltage Operation: Operates on a standard 12V DC supply, making it ideal for automotive setups, solar power systems, battery banks, and low-voltage enclosures.

Compact 3-Digit LED Telemetry Display: High-contrast 3-digit red LED screen continuously displays real-time temperature and parameter programming options.

Onboard 10A Switching Relay: Features an integrated heavy-duty relay rated up to 10A for directly controlling heating elements, thermoelectric coolers, or cooling fans.

Includes Waterproof NTC Sensor Probe: Comes bundled with a waterproof thermistor probe for precise temperature measurement in liquids, air, or moist environments.

Fully Programmable Temperature Parameters: Flexible onboard setup allows user-defined temperature setpoints, hysteresis differentials, delayed start protection, and sensor calibration.

Board Material: High-grade FR-4 PCB board with onboard tactile programming buttons and screw terminal blocks.

Technical Specifications:

Operating Voltage: 12V DC.

Temperature Control Range: -50°C – +110°C.

Control Precision: 0.1°C.

Relay Output Rating: 10A / 12V DC or 10A / 250V AC.

Board Color: Green PCB with Black Switching Relay.

Usage Advice: Double-check 12V power supply polarity (12V+ and GND) before powering on; ensure load wires are screwed down tightly into the terminal block.

Maintenance: Keep the circuit board free from dust, moisture, and conductive debris to prevent short circuits.

Essential DIY Thermal Control Engine: Position as an ultra-affordable, versatile open-frame thermostat for DIY incubators, aquarium temperature regulation, fermentation setups, and server rack cooling.

Highlight Compact & Customizable Design: Emphasize how this lightweight board delivers industrial-level digital temperature control for micro-budget and space-constrained electronics projects.

Recommended Cross-Sell Add-ons: Pair with W1209 Acrylic shell protective case, XH-W1219 DC 12V Dual Display Digital Thermostat, 12V 10A Digital Thermostat + NTC Sensor, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Thermostats collection page as your core 12V open-frame digital thermostat board.