W1209 Digital Temperature Controller Sensor | Thermostat Module

The W1209 Digital Temperature Controller Sensor controls temperature with ±0.1°C accuracy using a 12V DC supply. The w1209 digital temperature controller reads temperature through an NTC 10K thermistor (a resistor that changes value with heat). A bright 3-digit red LED display shows live readings at a 0.5-second refresh rate.

The w1209 controller stores your set temperature even after power loss, because it uses non-volatile memory. The temperature control module switches a 10A relay output to turn loads on or off automatically. The honest trade-off is that the w1209 thermostat module works only at 12V DC — it cannot run directly from a 5V Arduino pin, so a separate 12V supply is needed.

The w1209 temperature controller connects to any Arduino or standalone circuit without extra coding. Engineers testing cooling systems, and hobbyists making aquarium controllers all use this module. Connect the NTC sensor, apply 12V, and set your target temperature using the three onboard buttons. StemVolt provides this sensor with trusted quality, ensuring reliable performance and easy usability.

Related Products:

• Checkout  STC-1000 Digital Temperature Controlled

Features:

• NTC 10K thermistor input reads temperature from minus 50 to 110°C for wide project coverage
• Single channel relay output rated at 10A switches heaters or coolers without extra components
• Supply voltage of 12V DC powers the board and relay from a single standard adapter
• Three-digit red LED display makes current and set temperature readable from across the room

Technical specifications:

Applications:

• A DIY incubator uses this board to keep egg temperature steady automatically
• The W1209 Digital Temperature Controller Sensor controls a fan when a box overheats
• A greenhouse cooling system reads ambient temperature and triggers a ventilation fan at a set threshold

Package includes:

• 1 x W1209 Digital Temperature Controller Sensor