Before the world of humidity detection and temperature detection compared to the level of components lagged behind a lot, this is an indisputable fact, whether it is capacitive sensors or resistive sensors, the accuracy can be ± 2%, is already very impressive, and the price is quite expensive; double PT100 humidity detection is accurate, but the use of a very troublesome, because it is necessary to frequently add water to the wet bulb side of the PT100, very few users are willing to use. Moreover, different manufacturers, different types of humidity sensors react to humidity is not the same, it is difficult to compare, a simple hairline hygrometer, the response is slow, and not allowed, how can users simply determine the humidity? The following method can be tried:
At 25 ℃ -30 ℃ prepared saturated solution, magnesium bromide saturated solution of humidity is 30% ± 3% RH, magnesium nitrate saturated solution of humidity is 50% ± 3% RH, lithium acetate saturated solution of humidity is 70% ± 3% RH, ammonium sulfate saturated solution of humidity is 80% ± 3% RH, barium chloride saturated solution of humidity is 90% ± 3% RH.
Meditry Instrument Co., Ltd., 2 hours drive from Shanghai, is specialized in exporting and supplying high quality laboratory equipment, medical equipments, petroleum oil and chemical testing instruments.
