Product Details:
It does require a DC voltage to run, at 4.5-30VDC. It has reverse polarity protection in case you swap the power leads by accident.
To use, simply connect the thin red wire to a positive supply, and the thin black wire to ground. Then tape the black thermistor bulb to whatever you want to measure - or leave it loose to measure ambient temperature. The display has a microcontroller that will read thermistor resistance and display the corresponding temperature from -30°C to 70°C with 1 °C precision on a 3-digit 0.56" tall 7-segment display. The meter draws 3-4mA to power the microcontroller and display. This particular LED display is a nice vivid blue.
This meter can only display the temperature in Centigrade °C, it cannot be modified to °F.
Specifications:
Dimensions: • Dimensions: 48x29x21mm • Digit size: 14mm/0.56" high, blue LEDs • Panel cutout: 45.5mm x 26.5mm • Power lead length: 15cm • Thermistor lead length: 12cm • Refresh rate: about 2 Hz
Power specifications: • 4.5V to 30V DC input • 0.1V precision • 3-4mA draw • Blue LED display • Reverse polarity protected
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