Easy-to-use handheld meters are intended for spot-checking and calibration. The meters have a multilingual user interface and a variety of parameters to choose from, including humidity, dew point, CO2, and moisture in oil. The large graphical user interface enables monitoring the stabilization of the measurement.


Modular spot-checking for various parameters

Handheld measuring devices are typically used for measuring environmental or process conditions directly, or
as reference instruments for spot-checking or calibrating a fixed instrument in the field.

Vaisala handhelds are designed for demanding measurements in spot-checking applications. They are also ideal for field checking and calibration of Vaisala's fixed instruments. Handheld meters cover a range of measurements:

  • temperature
  • humidity
  • dew point
  • carbon dioxide
  • moisture-in-oil  

Each application can be addressed individually, or the probes can be easily changed for multi-parameter purposes.

Do you want to ensure your fixed instruments are indicating the correct numbers? Handhelds are specifically suitable for short-term measurements, either spot-checking or logging data for short period at specific point. With handhelds, it's easy to spot the incorrect device in multiple applications. The devices are light and portable, but still robust, intelligent, and intended for professional usage.

Key features

  • High-quality accuracy
  • Designed for professionals
  • Possibility to measure two parameters simultaneously
  • Light and portable
  • Easy to send to factory calibration


Handheld CO2 meter GM70

Handheld CO₂ Meter GM70

for spot-checking applications
The Vaisala CARBOCAP® Hand-held Carbon Dioxide Meter GM70 measures volume concentration of CO2 in the units of ppm or...
DM70 Hand-Held Dewpoint Meter

Handheld Dewpoint Meter DM70

for spot-checking applications
Handheld Dewpoint Meter DM70 for spot-checking applications and field calibration offers accurate and fast measurement...
HMK15 Humidity Calibrator

HMK15 Humidity Calibrator

Vaisala Humidity Calibrator HMK15 makes calibration and spot checking of humidity probes and transmitters easy and reliable, although for critical...
Spot-chcking eGuide


In this eGuide, we discuss the rationale behind device calibration and the factors that affect the need to spot-check and calibrate. The guide also provides some detailed information on the calibration and spot-checking of various parameters, including relative humidity, dew point temperature, carbon dioxide, temperature, and moisture-in-oil measurements.


Software for MI70 handhelds

The optional MI70 Link Windows® software in combination with a USB connection cable is used to transfer logged data and real-time measurement data from the HM70 to a PC.

Calibration service


Regular calibration of all measurement instruments is essential to ensure accuracy. We recommend sending your instruments to the original manufacturer for calibration whenever possible, especially handheld reference meters. Learn more in this blog post.

As a manufacturer, Vaisala offers a wide range of high-quality calibration and repair services that meet the strictest quality standards.

All our calibrations include:

  • Functional testing
  • Traceable calibration
  • Instrument adjustment as needed
  • Filter replacement as needed
  • Calibration certificate and service report
  • Calibration due-date update



Boston IVF uses the GM70 Handheld Carbon Dioxide Meter equipped with CARBOCAP® sensors for daily quality control. Daily checking of the chambers with Vaisala’s handheld meters ensures that any drift in the accuracy of incubators' built-in sensors is detected immediately.