ZkeeShop Digital Thermometer Temperaturfühler Mini DC 4-28V Temperature Gauge Sensor Dual Display with 2 NTC Waterproof Probes

Produktbeschreibung
Display Description: When the temperature sensor is removed when the digital display "- - -", the temperature is below -20 °Cor above 100 °C, digital also shows "- - -." DC power supply: This product requires access 4-28V DC power supply, the red line for positive power supply, the black wire to the negative power. Refresh rate: about 1S / times
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