How to Prepare Salt Solution for Vaisala Humidity Transmitter | Calibration Procedures

This video shows the Calibration Procedure for salt solution for the Vaisala humidity transmitter. This salt solution is used for the calibration of any other humidity transmitter.
There are 4 types of salt solutions that can be used to calibrate the humidity transmitters.
1. Lithium Chloride(LICL)
2. Magnesium Chloride(MGCL)
3. Sodium Chloride(NACL)
4. Potassium Sulphate.
Saturated salt solutions are used for relative humidity calibration as it is simple to create a set of fixed relative humidity points.
For more videos relates to humidity calibrators and other instruments calibrations, stay tuned.
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#VaisalaHumidityTransmitter
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[@kiarashvosough5576]

Hi! How can we know how much slat and water we need for the targeted relative humidity? For instance, Mg(NO3)2 can produce 53% of RH at 20 degrees Celsius. I do not know how much magnesium nitrate I need to dissolve in how much water to get the mentioned RH.

[@InstrumentCalibration]

Hi Kiarash
Thanks for asking this question. Please google it Vaisala Humidity Calibrator HMK15 manual for more information about salt concentration. Or you can share your mail id in comment box, and i will send you manual

[@kadenburgart551]

The salt solution needs to be saturated. I keep adding salt until there's a small amount of solid salt at the bottom of the mixture that refuses to dissolve, then give time for the air above the mixture to equilibrate in the sealed container with the sensor.