• Easy and reliable calibration of humidity probes and transmitters.
• Based on saturated salt solutions.
• Fast temperature equilibration.
• No external power is required.
• Suitable for laboratory use and on-site checks.
• Chambers and transit covers make HMK15 easy to transport.
• Pre-measured certified salts available.
• Vaisala Service Centers offer accredited calibrations for humidity, temperature, and barometric pressure.

Dpstar is a leading supplier of environmental measurement sensors for temperature, relative humidity, pressure, dew point, CO2, and other environmental condition monitoring for industrial process application and research. Since the ’90s, we earned a reputation as a trusted partner to our clients through our commitment and dedication. We are an authorized distributor and supplier of measuring sensors solutions from renowned manufacturers Vaisala. Vaisala is a global leader in environmental and industrial measurement. Building on 80 years of experience, Vaisala provides observations for a better world. Vaisala is a reliable partner for customers around the world, offering a comprehensive range of innovative observation and measurement products and services.

No measuring instrument stays accurate by itself. It is essential that the functioning of an instrument is periodically checked against a reference. Vaisala has developed Vaisala Humidity Calibrator HMK15 makes calibration and spot checking of humidity probes and transmitters easy and reliable, although for critical applications we recommend a Vaisala Service Center calibration for the best possible results.

Key Benefits

• Easy and reliable calibration of humidity probes and transmitters
• Suitable for laboratory use and on-site checks
• No external power required

Method used by leading laboratories

The operating principle of HMK15 is based on the fact that a saturated salt solution generates a certain relative humidity in the air above it. The reading of the humidity probe or transmitter can then be adjusted accordingly. Many leading laboratories use this generally accepted and reliable method to calibrate humidity instruments. Usually two or three different salt solutions are used. Salts are chosen according to the application.

Certified salts

HMK15 can be ordered with certified and pre-measured salts. A sample calibration is made from each batch in Vaisala’s Measurement Standards Laboratory (MSL).

FINAS accredited measurement standards laboratory

Vaisala’s Measurement Standards Laboratory is a FINAS accredited calibration laboratory. FINAS is a member of the EA (the European Cooperation for Accreditation).

Vaisala HMK15 Series Humidity Calibrator_DpstarGroup