There are lots of humidity meters on Amazon.com. Last year, I bough a nice thermometer / humidity meter for less than ten dollars. You can probably still find it on Amazon.
A device that measures humidity is called a hygrometer.
Humidity meters are used to measure the humidity outside. Typically, these would be placed on the outside of your house to accurately measure the humidity.
www.InstrumentsDirect.com do provide this facility in houston. they offer to Rent & Buy Ultrasonic Flow Meters. they Also includes electronic measurement & test equipment, flow meter, humidity meter
humidity meter
Because it doesn't say neither the temperature, the pressure or the humidity of the air. You need to know both the temperature, the pressure and the humidity of the air to say anything about the mass of one cubic meter of air.
A meter is a measure of length slightly longer than three feet. You cannot buy a meter of milk.
there are humidity controller thermostats for not much money, just buy one, install it (very very very easy) and set the desired humidity level
The amount of water vapor in the air is called the absolute humidity. It is usually expressed as grams of water vapor per cubic meter of air.
humidity
One can buy a taxi meter from a number of local car accessories dealers. However a taxi meter can also be bought from online stores such as Taxi cab supply and Taxi Cab Electronics.
75% relative humidity.
open the meter, buy a new bulb , put it in holder , refix