Goodhd Digital temperature sensor thermometer LED display dual NTC probe cable

Specifications: Size: 45mm*26mm Refresh rate: about 1s/ time Power supply voltage: DC 4-28v Accuracy: 1 ° C Measuring temperature: -20 ° C ~ 100 ° C Working temperature: -40 ° C ~ 80 ° C Sensor type: NTC 1m waterproof metal probe Display: 0.28 LED display Minimum resolution: 0.1 ° C instructions: [1] DC power supply: This product needs to be connected to a 4-28v DC power supply. The red line is the positive pole of the power supply and the black line is the negative pole of the power supply. The biggest feature of this product: it has a reverse anti scalding circuit to avoid problems caused by improper operation during the user s process. Tips: never connect AC 220V! [2] Display Description: when the temperature sensor is removed the nixie tube displays -- . When the temperature is lower than -20 ° cor 100 ° C the nixie tube also displays -- . [3] Typical aquisition temperature range: -20 ° C to 100 ° C resolution 0.1 ° C accuracy 1 ° C. Product usage: Indoor and outdoor temperature measurement of air conditioner and internal and external temperature measurement of refrigerator Pond temperature measurement Baby bath water temperature measurement Package includes: 1 * thermometer