Original Rugged Metal On/Off Switch with White LED Ring (1021mm White On/Off) – PartsCountry

Description

Put a temperature meter anywhere with this very handy display. This panel meter displays the temperature of the attached waterproof 1% thermistor in ??C. 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, which we found very readable. To mount to your enclosure, simply cut a 45.5mm ?? 26.5mm rectangle and snap it in.

This meter can only display the temperature in Centigrade ??C, it cannot be modified to ??F and we do not have a version that is ??F.

Technical Details

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