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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.

  • Battery runtimeLR44
  • Measuring range-58 degrees fahrenheit to 158 degrees fahrenheit
  • Operating conditions-58 degrees fahrenheit / 158 degrees fahrenheit
  • Storage conditions-58 degrees fahrenheit to 158 degrees fahrenheit
  • Product colorBlack
  • Product dimensions2.87 cm × 2.51 cm × 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.

How it compares

Measured against everything we stock in Digital Thermometers & Hygrometers, at today’s prices. Recalculated every night.

Price $15.99
Cheaper than about 80% of the 925 comparable items (median $23.99).

Specifications

Product
Brand nameVeanic
Part numberGcm-131
Product colorBlack
Power
Battery runtimeLR44
Size & build
Product dimensions2.87 cm × 2.51 cm × 0.51 cm
Product weight0.01 oz
Environment & compliance
Operating conditions-58 degrees fahrenheit / 158 degrees fahrenheit
Storage conditions-58 degrees fahrenheit to 158 degrees fahrenheit
More details
Measuring range-58 degrees fahrenheit to 158 degrees fahrenheit

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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