Product Introduction:
Size: 45 * 26mm
Supply voltage: DC 4-28V
Measurement Temperature: -20 ~ 100 centigrade
LED Display Color: Red + Green
Refresh Rate: 1 s / times
Measurement Precision: 1 centigrade
Operating Temperature: -40 ~ 80 centigrade
Sensor Type: 1 m NTC watertight metal probe
Minimum Resolution: 0.1 centigrade

1. DC Power Supply: this product must connect with DC 4-28 v power; red wire connects with power positive, black wire connects with power negative
2. Display: when take off temperature sensor, digital tube display "---"; when the temperature is lower than -20 centigrade or higher than 100 centigrade, digital tube will also display "---"
3. Normal Temperature Collection Range: -20 ~ 100 centigrade

Applications:
1. Measure car internal and external temperature
2. Measure air conditioning room indoor and outdoor temperature
3. Measure refrigerator internal and external temperature
4. Measure fish pond water temperature

Package Included:
1 x DC 4-28V Dual Digital Temperature NTC Gauge Sensor R/G LED Display Thermometer
Instructions/schematic are NOT included. We don't provide technical assistance please make sure that you are familiar with the product before purchasing.