Vaisala HM41 Handheld Humidity and Temperature Meter Standard Probe for Quick Inspections and Spot-Checking in HVAC

Vaisala HM41 HUMICAP® Hand-Held Humidity and Temperature Meter is an ideal everyday spot-checking tool for HVAC professionals. It is compact, portable and provides reliable measurements in a wide range of applications from structural moisture measurement and air conditioning systems to  industrial production and life science applications. 

HM41 model is part of the HM40 Series that includes the following models: HM41, HM42, HM45, and HM46. All HM40 models include a calibration certificate, light carrying case, and 2 x AA sized alkaline batteries (1.5V, LR6). The user interface with graphical trend display makes daily operation quick and easy with a user interface available in 10 languages.

A standard ISO 9001 factory calibration certificate is included in delivery. ISO 17025 accredited calibration is available upon request. In addition to relative humidity and temperature, the HM40 Series models display five calculated humidity parameters (absolute humidity, dew point, enthalpy, mixing ratio, wet bulb), all available in both metric (°C) and non-metric (°F) units.

HM41 features an interchangeable HMP113 measurement probe allowing for easy calibration (only the probe needs to be calibrated) or replacement of the probe.

Features:

• Humidity measurement range 0- 100 %RH
• Temperature measurement ranges -40 ... +100 °C (-40 … +212 °F), depending on probe model
• Incorporates proven Vaisala HUMICAPâ sensor technology
• Calibration reminder function
• Probes can be user-calibrated using an on-site reference
• Graphical display indicates when measurement has stabilized
• Hold-button to freeze the screen and save the reading
• Multilingual user interface available in 10 languages (EN, DE, FR, JA, ZH, PT, ES, RU, FI, SV)

Benefits:

• Compact, portable, and easy to use
• Versatile meter with wide measurement range and multiple calculated parameters
• Ideal for spot-checking in a wide variety of applications

Trust every spot check with a calibrated reference

A handheld device calibrated on time and traceable to a trusted provider like Vaisala serves as a reliable reference point for spot-check measurements. Vaisala's devices always come with a calibration certificate, confirming that the sensor has been tested against known reference standards and that its measurement errors are within acceptable limits - ensuring the instrument performs as specified and delivers dependable results.

Vaisala's calibration laboratories are accredited according to ISO/IEC 17025 by the world's leading accreditation authorities, ensuring traceability to international measurement standards and certified compliance. For users in HVAC, industrial production, and life science environments, this means confidence in every spot check, reduced risk of incorrect decisions, and clear insight into measurement uncertainty - so results can be trusted in both routine checks and critical applications.

For more information, please see Data Sheet