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

Representative image only.
Fluke Mfr # FLUKE-971 – Item # EW-37851-20
Ergonomically designed meter with datalogger
  • Calculates dew point and wet bulb
  • Use as part of regular HVAC maintenance

$332.99USD / Each
$369.99USD / Each

$160.00USD / Each

Time to recalibrate? Click on the calibration service to view details, then order.
Often Bought with…


Specifications & Description

  • Min RH Range (%)5
  • Max RH Range (%)95
  • RH Accuracy±2.5% RH
  • RH Resolution (%)0.1%
  • Min Temperature (° F)-4
  • Min Temperature (° C)-20
  • Max Temperature (° F)140
  • Max Temperature (° C)60
  • Temperature Accuracy±1.0°F from 32° to 113°F; ±2.0°F above 113° and below 32°F (±0.5°C from 0° to 45°C; ±1.0°C above 45° and below 0°C)
  • Temperature Resolution0.2°
  • Temperature Probe TypeRTD
  • Wet BulbYes
  • Response Time0.5 seconds
  • Display Type3-digit LCD
  • Data LoggingYes
  • BatteryAAA Battery (4)
  • DescriptionThermohygrometer, 5 to 95% RH/, -4 to 140F


four AAA batteries

Key Features

  • Calculates dew point and wet bulb
  • Use as part of regular HVAC maintenance

More About this Item

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.




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

(based on 1 review)

Reviewed by 1 customer

Displaying review 1

Back to top

(2 of 2 customers found this review helpful)


Fluke going down the toilet?


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.

      Displaying review 1

      Back to top


      Do you have questions about this product?

      Get answers from real customers and in-house experts with AnswerBox.

      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

        • STAFF EXPERT


          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
      Displaying question 1

      Do you have a question about this product? 


      Need Help with this product?

      Our specialists are here to help you find the best product or part available for your application. Call or Email us and we will make sure you get the right product or part for the job.

      Call Us At1-800-323-4340
      Live chat