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.
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.
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).
Vaisala’s Measurement Standards Laboratory is a FINAS accredited calibration laboratory. FINAS is a member of the EA (the European Cooperation for Accreditation).
|Operating temperature range||+0 … +50 °C (+32 … +122 °F)|
|Dimensions (H × W × L)||90 × 230 × 200 mm
(3.54 × 9.06 × 7.87 in)
|Weight||1 kg (2.20 lb) without salt solutions|
|Standard contents of HMK15 Calibrator|
|Two salt chambers, chamber covers, and transit covers|
|Measurement cup and mixing spoon|
|See table Spare parts and accessories|
|Spare Parts &Amp; Accessories|
|Rubber plug set||19746HM|
|Ion exchanged water||19767HM|
|Adapter fitting for 12 mm probes||211302SP|
|Thermometer with red capillary liquid||25130HM|
|Cover set for DMT132/HMP110 with filter||230914|
|HMK15 chamber lid for 4 × HMP110 with filter||253277SP|
|Adapter for HMP42 probe||HM37067|
|Certified and ready dosed salts 1)|
|Ready-dosed LiCl salt package (LiCl salt 11 %RH, total uncertainty ±1.3 %RH) 2)||19729HM|
|Ready-dosed MgCl2 salt package (MgCl2 salt 33 %RH, total uncertainty ±1.2 %RH) 2)||19730HM|
|Ready-dosed NaCl salt package (NaCl salt 75 %RH, total uncertainty ±1.5 %RH) 2)||19731HM|
|Ready-dosed KCl salt package (KCl salt 85 %RH, total uncertainty ±2.0 %RH) 2)||251377HM|
|Ready-dosed K2SO4 salt package (K2SO4 salt 97 %RH, total uncertainty ±2.0 %RH) 2)||19732HM|
|1) Calibration certificate included with each salt package.
2) Uncertainties given at +20 °C (+68 °C).