W1219 Digital Temperature Controller Module with DS18B20 Sensor
W1219 Temperature Controller Module with Waterproof Sensor – 12V Digital Thermostat
The W1219 is a compact digital temperature controller module designed for precise temperature regulation in hobbyist and industrial applications. It includes a waterproof DS18B20 probe sensor and a built-in relay, allowing you to switch heating or cooling devices based on user-set thresholds. The bright red LED display shows real-time temperature and setpoints, making it ideal for incubators, fermentation chambers, and aquarium systems.
Key Specifications
| Specification | Value |
|---|---|
| Input Voltage | 12V DC |
| Temperature Range | -55°C to +110°C |
| Sensor Type | DS18B20 Waterproof Probe |
| Control Accuracy | ±0.1°C |
| Relay Rating | 10A @ 250V AC / 10A @ 30V DC |
| Display | 3-digit Red LED |
What You Can Build With This
- Egg incubator with automatic temperature regulation
- Aquarium heater controller for tropical fish
- Fermentation chamber for yogurt or kombucha
- Server room cooling fan trigger based on ambient temperature
Compatibility
This module operates independently without a microcontroller, but it can be integrated into larger systems. The relay output can connect directly to Arduino or Raspberry Pi GPIO via an external driver if you wish to monitor or override control. It works with any load within the relay rating and is commonly paired with 12V heating pads or fans.
Wiring Notes
Connect 12V DC to the power input terminals (observe polarity). The DS18B20 sensor plugs into the dedicated 3-pin connector—no additional pull-up resistor is needed. The relay provides normally open (NO) and common (COM) screw terminals; wire your load in series with these contacts and ensure current does not exceed 10A.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, you can read the DS18B20 sensor data with an Arduino using the OneWire library, and the relay can be used to switch Arduino-controlled devices if isolated properly.
Can the sensor cable be extended?
The waterproof probe comes with a 1-meter cable. You can extend it using a 3-wire connection, but keep total length under 10 meters to avoid signal degradation.
Does it remember settings after power off?
Yes, the W1219 stores the setpoint temperature and hysteresis in non-volatile memory, so settings persist after a power cycle.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items