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Fluke 971 Thermohygrometer, 5 to 95% RH, -4 to 140F

Fluke  |   Mfr# FLUKE-971  |   Item# DO-37851-20

$349.99 USD/EACH
$314.99 USD/EACH

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  • Ergonomically designed meter with datalogger
  • Calculates dew point and wet bulb
  • Use as part of regular HVAC maintenance
The Fluke 971 meter is built for field use with an impact resistant housing, rugged holster, convenient belt clip, and bright backlit display. Includes degF/degC selection, Min/Max reading, hold feature, averaging function, and 99 record datalogging capacity. A large LCD simultaneously displays RH and temperature readings, along with calculating dew point and wet bulb.

Available for sale in the United States and Canada only.
What's Included:
four AAA batteries
Product Type Thermohygrometer
RH range (min) 5%
Temp range -4 to 140°F (-20 to 60°C)
RH range (Max) 95%
RH range 5 to 95%
Max temperature (º C) 60
RH accuracy ±2.5%
RH resolution 0.1%
Min temperature (º F) -4
Min temperature (º C) -20
Max temperature (º F) 140
Temp accuracy ±1.0°F @ 32 to 113°F, ±2.0°F for remaining range (±0.5°C 0 to 45°C, ±1.0°C for remaining range)
Temp resolution 0.2°F (0.1°C)
Dimensions 2.5 in W x 7.5 in H x 1.25 in D
Temp sensor RTD
Dewpoint Yes
Wet bulb Yes
Response time 0.5 seconds
Data Logging Yes
Model FLUKE-971
Qty/ea 1
Manufacturer number FLUKE-971
Brand Fluke
Display RH: 3-digit LCD,Temperature: 3-digit LCD
Power 4 AAA battery (included)


at $26.00 USD/PACKAGE of 12

In stock.

at $160.00 USD/EACH
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Questions and Answers

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1 Question | 1 Answer
Displaying question 1
  • Q:

    minimum temperature range for Fluke 971 is -20 deg C.
    1. what will happen if we using it to mesure the temperature between -20 deg C to -30 deg C ?

    2. can Fluke 971 be calibrate to below -30 deg C ?
    Asked on 11/24/2011 by Mazlan Zain from Kuala Lumpur, Malaysia

    1 answer



      The product is not intended for measuring temperatures lower than -20 degrees C, and we have no information on the product if it were used outside of it's stated temperature range.

      Answered on 11/28/2011 by Jack from Technical Support
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Product Reviews


by PowerReviews
Fluke 971 Thermohygrometer, 5 to 95% RH/, -4 to 140F

(based on 1 review)

Reviewed by 1 customer

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(2 of 2 customers found this review helpful)


Fluke going down the toilet?

By 3rdprize

from Aurora, IL

Verified Buyer



    • Inaccurate

    Best Uses

      Comments about Fluke 971 Thermohygrometer, 5 to 95% RH/, -4 to 140F:

      I purchased one of these recently and was suprised to see it reading out of range as compared to other similar calibrated intruments in our lab. A replacement was ordered and it was within it's stated accuracy but the black scensor on the top of the unit was glued on at an angle, pretty sloppy. On another note, we send many of our Fluke instruments directly to Fluke for calibration and have had nothing but trouble. The list of issues is to extensive to list in this type of forum. I am currently looking for other brands and other calibration houses.

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