Humidity meters (Hygrometers)

Humidity is the amount of water vapor in the air. Water vapor is the gas phase of water and is invisible.^[1] Humidity indicates the likelihood of precipitation, dew, or fog. Higher humidity reduces the effectiveness of sweating in cooling the body by reducing the rate of evaporation of moisture from the skin. This effect is calculated in a heat index table, used during summer weather.

There are three main measurements of humidity: absolute, relative and specific. Absolute humidity is the water content of air.^[2] Relative humidity, expressed as a percent, measures the current absolute humidity relative to the maximum for that temperature. Specific humidity is a ratio of the water vapor content of the mixture to the total air content on a mass basis.

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Name	Description	Category
TST0189/190 - Wall Display Thermo-Hygrometer with/without alarm with Resolution 0.1 deg.c	The accurate TST0189/190 alarm hygrometer reliably indicates when humidity and temperature limits have been exceeded, for example in garden centres, warehouses, cleanrooms, museums, laboratories etc. All the benefits of TST0189 High accuracy ±2 %RH (TST0190) TST0190 with LED alarm, warns if limits are exceeded Storage temperature -40 to +70 °C Operating temperature -10 to +70 °C Battery type 9V block battery Battery life 8736 h Weight 168 g Material/Housing ABS Probe type NTC Meas. range -10 to +70 °C Resolution 0.1 °C Probe type humid. sensor, cap. Meas. Range +2 to +98 %RH Resolution 0.1 %RH	Wall-display humidity meters
KKI0002-Wall Display Thermo-Hygrometer with max/min reading and external sensor JB913	Feature: -Provide temperature and humidity display with Dry,Wet,Comfort Indication -Monitor Max,Min temp./humidity reading -With water-proof external outdoor temperature sensor	Wall-display humidity meters
KKI0002E-JB914 (IMPROVED VERSION) LARGE DISPLAY THERMOMETER/ HUMIDITY W BAR CHART	Therma-Hygrometer simultaneously displays both the humidity and temperature in addition toindicating and recording the maximum and minimum readings. It includes colour-coded zones fordry, comfort and wet, making it very easy to read.The instrument measures temperature over the range of 0 to 50 °C and humidity over the range of10 to 99 %rh.This therma-hygrometer is ideal for monitoring both temperature and humidity in rooms, offices,factories and similar to ensure optimum working conditions are maintained.The unit is housed in an ABS case, measuring 20 x 100 x 110 mm, that incorporates a usefulfoldaway stand and a keyhole slot for hanging on a wall.*Without external sensorspecification temperature humidityrange 0 to 50 °C 10 to 99%rhresolution 0.1°C /°F 1%rhaccuracy ±1°C ±5%rhbattery 2 x 1.5 volt AAAbattery life 10000 hoursdisplay dual custom LCDdimensions 20 x 100 x 110mmweight 150 grams	Wall-display humidity meters
TST0468-623 HYGROMETER WITH HISTORY FUNCTION OF THE MEASUREMENT VALUES,	Hanging and standing bracket allows felxible positioning on a wall or desktop Analysis of past temperature and humidity values directly on site without evaluation on a PC All important values at a glance: current and past temperature and humidity values as well as date and time	Wall-display humidity meters
TST0467-622 HYGROMETER WITH PRESSURE DISPLAY, INCL. CALIBRATION PROTOCOL, BATTERIES	Precise measurement of temperature, humidity and pressure All important values at a glance: current measurement values as well as date and time Calibration and adjustment of the measuring instrument possible on site with the optional calibration and adjustment software Adjustable calibration reminder function	Wall-display humidity meters
EXT0069RH520A HUMIDITY+TEMPERATURE CHART RECORDER	Graphical and digital display of relative humidity and temperature Stores up to 49,000 readings in internal memory Review recorded data on meter display or download readings to a PC via included RS-232 cable Programmable High and Low alarm set points Swivel control panel acts as desk stand or is flush with meter for wall mounting	Wall-display humidity meters
TEN811-Large Wall Display Temperature/Humidity Monitor with 95dB Sound Alarm/Controller	- Complete environmental monitor and alarm - Wall-Mounted LED type, easy reading - Alarm set for Hi and Low limit-Temperature and Humidity - LED displays real time data	Wall-display humidity meters
TEN880D-TM-188D HEAT STRESS WBGT METER WITH TEMP/RH/DEW POINT	- Dataloggin, Quick-response capacitance sensor, accurate measurement for wet bulb globe temperature(WBGT), black globe temperature(TG), humidity(%RH), air temperature(TA), wet bulb(WET) and dew point(DEW). - Max/Min and data hold. - Low battery indication. - LCD display with LED backlight. - Viewing data records. - Switch the temperature unit to ℃ or ℉. - Brass black ball in 50mm diameter. - WBGT alarm setting. - Auto power off with disable function. - Data logging capacity: 12000 records, USB PC serial interface (TM-188D). - Sampling interval: Max 24 hours; Min 1 Second (TM-188D).	Portable humidity meters