Thermal Sensor Relay Module
This is a self-contained switching module that energizes / de-energizes a relay based on the temperature. Just add 5V power and hook up the load you want to control then adjust the potentiometer to set the temperature at which you want the relay to switch between ON / OFF. This type of module can be used for applications such as to automatically turn on an exhaust fan when the temperature gets above a preset level as might be the case in a greenhouse or aquarium room or it could be used to energize a heating device when the temperature drops below a preset level. This product is known as 1 Channel 5V Universal Temperature Thermal Sensor Relay Module, Thermal Sensor Relay Module, Thermal Sensor Relay Module.
Theory of Operation:
- The temperature sensor on the module is a standard thermistor.
- The temperature trip-point for triggering the relay can be adjusted using the potentiometer on the module. Turning the pot CW increases the temperature trip-point.
- When the temperature goes over the trip-point value, an LM393 voltage comparator IC energizes the relay and it switches ON. A green LED is illuminated when the relay is energized.
- When the temperature drops below the preset value, the relay switches back OFF.
- The relay has both NO (Normally Open) and NC (Normally Closed) contacts so the module can either be used to energize a load when the temperature goes up past the trip-point value or when it goes down past that level.
- A flyback diode is included on the module in parallel to the relay coil to safely shunt current when the relay coil is de-energized.
Relay Pinouts:
- Normally open ( NO )
- Common terminal ( COM )
- Normally closed ( NC )
Features/Specs:
- Operating Voltage: 3.3 ~ 5VDC
- Maximum Voltage: 5VDC
- Maximum Operating Current: 0.15A
- Trigger Voltage: 5VDC
- Switching Voltage: 250VAC@10A
- Switching Voltage: 30VDC@10A
- Operating Temperature: -40 ~ 100°C
- Opt. Relative Humidity(RH: 20% ~ 85%
- Storage condition: -40 ~ 125℃
- Length: 50 mm
- Width: 26 mm
- Height: 17 mm
- Weight: 16 gm
Package Includes:
- 1 x Thermal Sensor Relay Module
Note: Product images are shown for illustrative purposes only and may differ from the actual product.
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