email:
inquiry@drdewlittle.com
Products Manufacturers
Manufacturers of moisture measurement products organized by category of measurement technology.
Adsorption of water molecules into light a
transmissive medium, whereby the refractive index changes according
to the water vapor concentration.
Fiber-optic Adsorption
Chemical reaction – chemically impregnated
materials
(e.g. cobalt chloride), change color when reacting with water vapor.
Color Indicator (Drager / Stain)
Tubes
Condensation – the sample gas is cooled until
condensation appears.
The temperature at which it occurs is the dewpoint of the gas.
Chilled Mirror automatic
Cooled Mirror manual
Electrolytic
– absorbed water vapor is electrolyzed and the resulting current
measured.
P2O5
(Phosphorus pentoxide)
LiCl (Lithium Chloride)
Impedance – hygroscopic materials change their
impedance as they adsorb and desorb water vapor.
Metal Oxide / Ceramic
Polymer
Mechanical – expansion and contraction of
materials with change in humidity: e.g.
horse hair, catgut, paper,
plastic, etc..
visit
Institute and Museum of the History of Science (watch the
video)
Mechanical Hygrometer
Piezoelectric
– a quartz oscillator’s resonant frequency is affected by the mass
of the water absorbed on its surface.
Quartz
Spectroscopic – the water vapor content is
determined by the amount of energy absorbed at a characteristic
frequency.
Laser
Wet& Dry bulb (psychrometer) - used to
measure relative humidity using two thermometers. Evaporation from
the wet bulb is indicative of the RH.
Psychrometer
Calculators for converting
moisture measurement units of measure
Related resources
- We have researched to the best of our ability to list all technologies and manufacturers.
- Please let us know if we can supplement our list.