12V Digital Thermostat with NTC Probe – ±0.1°C Precision for Incubators, Aquariums, and Greenhouses
When the temperature drifts by even a fraction of a degree, the consequences can be significant. In an incubator, it means failed hatches; in an aquarium, it can put your livestock at risk. This 12V digital thermostat with NTC probe puts you back in control, offering a rapid 0.5-second response time and precision that ensures your environment stays exactly where you need it.
Note: This module requires a 12V DC power supply. For loads exceeding 7A, please use an external contactor controlled by the relay output.
Why choose this model? (Key Advantages):
- True ±0.1°C Precision — unlike cheaper models that only offer ±1°C, this is essential for egg incubators where a 0.5°C deviation can significantly impact hatch rates.
- Waterproof 10K NTC Probe — safe for direct submersion in aquariums or tanks; the 40 cm cable provides flexible positioning without the need for extensions.
- -50°C to +110°C Range — versatile enough for everything from DIY fridges to fermentation chambers; one device for multiple projects.
- 7A Internal Relay (AC/DC compatible) — directly switches 250V AC or 12V DC equipment without requiring additional modules.
- 6 Programmable Parameters (P0–P6) — easily adjust hysteresis, alarms, relay delay (up to 600s), and sensor calibration via a simple 3-button menu.
- Compact 48×28×32 mm Design — fits a standard 46×26.5 mm panel cutout, making it perfect for integration into control panels or DIY enclosures.
Performance and Specifications
At the heart of the device is a 10K NTC sensor with a 40 cm moisture-sealed cable, suitable for direct contact with water. The internal relay supports 7A at 12V DC and 7A at 250V AC, allowing you to control aquarium heaters or greenhouse fans directly. The LED display updates every 0.5 seconds, ensuring you can spot any temperature fluctuations before they become a problem.
| Parameter | Value / Detail |
|---|---|
| Supply Voltage | 12V DC |
| Max Switched Current | 7A / 12V DC | 7A / 250V AC |
| Temperature Range | -50°C – +110°C |
| Resolution | 0.1°C |
| Measurement Accuracy | ±0.1°C |
| Probe Type | Waterproof NTC 10K |
| Probe Cable Length | 40 cm |
| Module Dimensions | 48 × 28 × 32 mm |
| Panel Cutout | 46 × 26.5 mm |
| Display Update Rate | Every 0.5 seconds |
| Operating Modes | Heating / Cooling (selectable via P0) |
Programming and Usage Instructions
- Hold the SET button for 5 seconds to enter the configuration menu.
- Use the + and – buttons to navigate through parameters P0–P6.
- Press SET to select the desired parameter, then adjust the value using + / –.
- Confirm your setting by pressing the SET button again.
- Available parameters: P0 – Mode (Heating/Cooling), P1 – Hysteresis (default 2°C), P2 – Upper Limit, P3 – Lower Limit, P4 – Sensor Calibration, P5 – Relay Delay (0–600s), P6 – High-Temperature Alarm.
Package Contents
- 1x 12V Digital Thermostat Module with LED display
- 1x Waterproof 10K NTC Probe (40 cm cable)
Frequently Asked Questions
Can this be used for an egg incubator?
Yes, it is designed specifically for such applications. The ±0.1°C precision and adjustable hysteresis maintain a constant temperature throughout the incubation period, preventing the fluctuations that can harm hatch rates.
Can the probe be submerged directly in water?
Yes. The 10K NTC probe is sealed and resistant to direct contact with water, making it perfect for aquariums, tanks, or reservoirs. Please ensure the electronic module itself remains dry.
What if my equipment draws more than 7A?
Simply connect an external contactor (power relay) to the thermostat’s output. The thermostat will control the contactor, which in turn powers the load—a standard solution for high-draw pumps or heating elements.
Can I control 230V equipment if the module is powered by 12V?
Yes. While the module requires 12V DC power, the relay output is isolated and can switch circuits up to 250V AC / 7A. This allows you to control mains-powered devices through the relay contacts.
Photo Gallery
C********** **rc** –
Using this for my reptile tank and it keeps the heat spot on. The probe is very sensitive and accurate.