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Four tiny black digital thermometer hygrometers, each about 1.89 by 1.13 by .6 inches, square with rounded corners

Veanic 4-Pack Mini Digital Thermometer Hygrometer Black gcm-131

SKU CH-9E2T-ADF9H

Four compact meters track temperature from minus 58 to 158 °F and humidity from 10 to 99 % RH with ±2 °F and ±5 % RH accuracy.

  • ColorBlack
  • Measurement Range-58 degrees_fahrenheit to 158 degrees_fahrenheit
  • Battery LifeLR44
  • Operating Environment-58 degrees_fahrenheit / 158 degrees_fahrenheit
  • Storage Environment-58 degrees_fahrenheit to 158 degrees_fahrenheit
  • Dimensions2.87 cm x 2.51 cm x 0.51 cm
  • Compact size fits jars, cases and incubators
  • Measures temperature from -58 to 158 Fahrenheit
  • Tracks humidity across 10 to 99 percent RH
  • Accuracy within ±2°F and ±5% RH for reliable readings
  • 12 to 18 month battery life with four spare LR44 cells included

Mini Indoor Climate Monitors

Four compact digital gauges track temperature and humidity in small enclosed spaces. Each unit measures 2.87 cm by 2.51 cm by 0.51 cm and weighs 0.01 ounces. The pack suits hobbyists monitoring reptile tanks, guitar cases, incubators or jars where ambient conditions matter.

Fahrenheit-Only Display with Fixed Sampling

Readings update every 10 seconds and show temperature from -58 to 158 degrees_fahrenheit with ±2 tolerance. Humidity spans 10% to 99% RH with ±5% RH accuracy. No backlight or Celsius option exists, so dark or metric-preferred environments need supplementary lighting or conversion.

Upgrades Analog Dials and Single-Probe Units

Replaces bulky analogue hygrometers that drift over time and single-function thermometers lacking humidity data. The jump is worthwhile when multiple microclimates need simultaneous, battery-backed tracking for 12 to 18 months per LR44 set.

Highlights

  • Compact size fits jars, cases and incubators
  • Measures temperature from -58 to 158 Fahrenheit
  • Tracks humidity across 10 to 99 percent RH
  • Accuracy within ±2°F and ±5% RH for reliable readings
  • 12 to 18 month battery life with four spare LR44 cells included

Specifications

BrandVeanic
ColorBlack
Part Numbergcm-131
Measurement Range-58 degrees_fahrenheit to 158 degrees_fahrenheit
Battery LifeLR44
Operating Environment-58 degrees_fahrenheit / 158 degrees_fahrenheit
Storage Environment-58 degrees_fahrenheit to 158 degrees_fahrenheit
Dimensions2.87 cm x 2.51 cm x 0.51 cm
Weight0.01 ounces

Questions about this item

How many meters come in the gcm-131 pack and what backup batteries are included?

The pack contains four digital thermometer hygrometers with batteries already installed, plus four extra LR44 button cells for later replacement.

What does the ±2°F accuracy mean when I place one in a reptile tank or guitar case?

Readings will stay within two degrees Fahrenheit of the true temperature across the -58 to 158 operating span, updating every ten seconds.

Does the unit use a wireless link or a wired probe to sense conditions?

It has a built-in sensor only; there is no wireless connection or external probe, so the meter must sit directly in the space you want to monitor.

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