HM41 Vaisala Compact Humidity and Temperature Meter
HM41 Vaisala Compact Humidity and Temperature Meter

: $599.00
: $571.00
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Availability:: Usually Ships in 24 Hours
Product Code: HM41


The Vaisala HM41 is an ideal everyday spot-checking tool for HVAC professionals. The proven Vaisala HUMICAP 180R sensor provides reliable measurement while the user interface with graphical trend display makes daily operation quick and easy. User interface for this humidity and temperature meter is available in 10 languages.

In addition to relative humidity and temperature, the Vaisala HM41 can display five calculated humidity parameters (absolute humidity, dew point, enthalpy, mixing ratio, wet bulb), all available in both metric and non-metric units. The Vaisala HM41 features an interchangeable HMP113 measurement probe allowing for easy calibration (only the probe needs to be calibrated) or replacement of the probe.

The Vaisala HM41 is replacing the HM34 hand-held humidity meter.

The humidity and temperature meter package includes:

  • HM41 indicator with attached HMP113 RH&T probe
  • Calibration certificate (ISO9001 compliant, NIST traceable)
  • Belt clip
  • Light carrying case
  • Alkaline batteries 2 x AA sized, 1.5V (LR6)
  • User's Guide in English


Measurement parameter(s)Relative humidity
Absolute humidity*
Dew point temperature*
Mixing ratio*
Wet bulb*
Measurement range0 ... 100 % RH
-10 ... +60 C (+14 ... +140 F) T
Measurement accuracyAt temperature +0 ... 40 C (+32 ... +104 F):
1.5 % RH (0 ... 90 % RH)
2.5 % RH (90 ... 100 % RH)
0.2 C T
Operating temperature-10 ... +60 C (+14 ... +140 F) T
Operating voltage2xAA-size alkaline batteries, type IEC LR6
Housing classificationIP54

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 1 Write a review.

  0 of 0 people found the following review helpful:
5 of 5 HM40/Hygrometer April 17, 2023
Reviewer: David Kasten from Rockford, IL United States  
These meters are the best! They are the most accurate hygrometers that I have ever used.

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