Humidity Sensors

Humidity is the presence of water in air. The amount of water vapour in air can affect human comfort as well as many manufacturing processes in industries. The presence of water vapour also influences various physical, chemical, and biological processes.


Humidity sensors work by detecting changes that alter electrical currents or temperature in the air. There are three basic types of humidity sensors: capacitive, resistive and thermal. All three types will monitor minute changes in the atmosphere in order to calculate the humidity in the air.


A capacitive humidity sensor measures relative humidity by placing a thin strip of metal oxide between two electrodes. The metal oxide’s electrical capacity changes with the atmosphere’s relative humidity. Weather, commercial and industries are the major application areas. Resistive humidity sensors utilize ions in salts to measure the electrical impedance of atoms. As humidity changes, so does the resistance of the electrodes on either side of the salt medium. Two thermal sensors conduct electricity based upon the humidity of the surrounding air. One sensor is encased in dry nitrogen while the other measures ambient air. The difference between the two measures the humidity.


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608-H1
608-H1 - HYGROMETER, 10% TO 95%, 3% ACCURACY

70C2014

HYGROMETER, 10% TO 95%, 3% ACCURACY

TESTO

HYGROMETER, 10% TO 95%, 3% ACCURACY; Humidity Range:10% to 95% Relative Humidity; Accuracy %:3%; Resolution (°C):0.1°C; External Height:111mm; External Width:90mm; External Depth:40mm; Product Range:-; Battery Lifetime:8736h; RoHS Compliant: Yes

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CY8CKIT-PSOC-024LP
CY8CKIT-PSOC-024LP - Low Power Kit Board, 8 bit, PSoC 1, M8C, CY8C24x93

08X0891

Low Power Kit Board, 8 bit, PSoC 1, M8C, CY8C24x93

INFINEON

LOW POWER KIT BOARD, 8BIT, PSOC 1, M8C; Silicon Manufacturer:Cypress; No. of Bits:8bit; Silicon Family Name:PSoC 1; Core Architecture:M8C; Core Sub-Architecture:M8C; Silicon Core Number:CY8C24X93; Product Range:- RoHS Compliant: Yes

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DPP901G000
DPP901G000 - Grove System Board, MS8607, Digital Pressure,  Humidity and Temperature Sensor, I²C

03AC1346

Grove System Board, MS8607, Digital Pressure, Humidity and Temperature Sensor, I²C

TE CONNECTIVITY

GROVE BOARD, HUMIDITY/PRESSURE SENSOR; Accessory Type:Digital Pressure & Humidity Sensor Board; For Use With:Grove System compatible expansion ports configurable for I2C communication; Product Range:- RoHS Compliant: No

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