The W1209 Digital Temperature Controller Sensor displays readings on a 3-digit red 7-segment LED with ±0.1°C accuracy, sensing temperature via an NTC 10K probe across -50°C to +110°C, switching a single-channel 10A relay output, operating from 12V DC input, with a 0.5 second refresh rate. The w1209 controller’s 3-digit display is a practical interface detail — it can show temperatures down to a tenth-of-a-degree resolution, giving immediate visual feedback without needing a connected computer or smartphone app.
The w1209 digital temperature controller is specifically a 12V-only design, distinguishing it from more versatile thermostat controllers that accept multiple supply voltages — this makes the W1209 well-matched for 12V battery systems, automotive applications, and DC power setups already running at 12V, but it cannot be powered directly from a 5V Arduino or AC mains without an appropriate 12V adapter. As a temperature control module, the w1209 temperature controller’s single relay channel means it controls one heating or cooling device at a time, switching it on or off based on the programmed set-point.
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:
- 3-digit LED display shows temperature to 0.1°C resolution
- 12V-only design suits battery and automotive DC power systems
- Single relay channel controls one heating or cooling device
- NTC 10K probe sensing across wide -50°C to 110°C range
- 0.5 second refresh rate for responsive thermal control
Technical specifications:
 Applications:
- W1209 used for 12V battery-powered incubator temperature control
- College project uses w1209 controller for thermostat display demo
- Automotive uses w1209 digital temperature controller for India car fridge control
- DC setup uses temperature control module for solar battery thermal management
- Aquarium uses w1209 temperature controller for 12V heater switching
Package includes:
- 1 x W1209 Digital Temperature Controller Sensor
Deep Singh –
Customer care support was helpful with setup guidance, while the module delivered reliable thermostat control and stable performance for temperature regulation tasks.
Ravi Verma –
Best kit ever bought
Anjali Chadda –
Received on time
Parmeet Siddhu –
Authentic product received
Suraj Prakash –
Well sealed box packaging
Ashish Verma –
It gives accurate temperature monitoring and automatic control, making it ideal for DIY projects, incubators, cooling systems, and automation applications