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Handheld thermometer-humidity meter with backlit LCD display

Cooper Atkins

Cooper Atkins SRH77A thermometer humidity meter 3 channels +/-0.3F accuracy -40 to 300F 10-95% RH backlit LCD

SKU CH-J3XH-BQQPD

Measures temperature and humidity across three channels with ±0.3 °F accuracy from -40 to 300 °F and 10 to 95 % RH on a backlit LCD

  • Product typeEnvironmental & Mechanical
  • Accurate readings within ±0.3 °F or ±0.5 % of reading
  • Measures -40 °F to 300 °F and -40 °C to 150 °C
  • Tracks humidity from 10 % to 95 % RH
  • Three-channel monitoring with constant scan and min/max memory
  • Clear 0.1 ° resolution on backlit 4-digit LCD

Three-channel environmental meter

The Cooper Atkins SRH77A measures temperature and relative humidity across three channels. A thermistor sensor provides readings from -40 to 300 degrees Fahrenheit and 10 to 95 percent RH. The backlit LCD shows 0.1 degree resolution and one percent RH resolution. Accuracy is +/- 0.3 degrees F or +/- 0.5 percent of reading, whichever is greater.

+/-0.3 degree accuracy with NIST traceability

The single specification that confirms suitability is the stated accuracy of +/- 0.3 degrees Fahrenheit or +/- 0.5 percent of reading, whichever is greater. This tolerance applies across the full temperature and humidity range. The unit ships with a NIST-traceable certificate for verification.

Constant-scan operation with min/max memory

Under sustained use the meter runs a constant scan across all three channels without interruption. Min/max memory captures peak and trough values over long periods. The 9V battery powers continuous monitoring. Switchable Fahrenheit or Celsius readout remains stable during extended sessions.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $445.99
Pricier than about 90% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameCOOPER ATKINS
Product typeEnvironmental & Mechanical

Questions about this item

How does the ±0.3 °F accuracy hold up across the full -40 °F to 300 °F range?

The meter maintains ±0.3 °F or ±0.5 % of reading, whichever is greater, over the entire -40 °F to 300 °F span.

What does the three-channel design actually let me measure at once?

Three channels let you track temperature on two external probes plus the internal sensor, or humidity on one channel, simultaneously.

What mounting options suit the 7/8 in high by 2 in wide backlit LCD unit?

The compact handheld body fits a tool pouch, belt clip or bench stand; no panel-mount hardware is included.

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