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Humidity Sensors

Humidity sensors, also known as hygrometers, are devices that measure and report both moisture and air temperature. The aim of these sensors is to measure relative humidity (RH) in the air. Relative humidity is a measurement of the amount of water vapor present in the air compared to the maximum amount that the air could hold at a given temperature. Two main types of humidity sensors are capacitive and resistive.

Capacitive sensors operate by measuring the change in capacitance of a sensor element. The sensor element is a simple capacitor with a dielectric made from a hygroscopic material. As humidity changes, the dielectric constant of this material changes, which in turn changes the capacitance of the sensor. The resulting change in capacitance can be converted into a humidity reading.

Resistive humidity sensors measure the change in impedance of a hygroscopic material to provide a humidity reading. The sensor consists of two electrodes with a moisture-sensitive material between them. As humidity changes, the resistance of this material changes. This change in resistance can be measured and converted into a humidity reading.

Products

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$480.70
ACI CONFIGNIST99 Relative Humidity, RH Outputs: 0-10 VDC, Wall Plate 304SS, ± 2% Accuracy, 10,000 Ohm Thermistor (Type II), 0-10VDC, NIST Cert
$463.10
ACI CONFIGNIST97 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R2), ± 2% Accuracy, 10,000 Ohm Thermistor (Type II), NIST Cert
$463.10
ACI CONFIGNIST95 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R2), ± 2% Accuracy, 100 Ohm (Three Wires) RTD, NIST Cert
$463.10
ACI CONFIGNIST87 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R), ± 2% Accuracy, 100 Ohm (Two Wires) RTD, NIST Cert
$783.20
ACI CONFIGNIST80 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Duct, ± 1% Accuracy, 10,000 Ohm Thermistor (Type II), Euro Enclosure, NIST Cert
$480.70
ACI CONFIGNIST78 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Outside Air, ± 2% Accuracy, 10,000 Ohm Thermistor (Type III), Euro Enclosure, NIST Cert
$389.40
ACI CONFIGNIST74 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R), ± 3% Accuracy, 10,000 Ohm Thermistor (Type II), NIST Cert
$389.40
ACI CONFIGNIST73 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R), ± 3% Accuracy, 20,000 Ohm Thermistor, NIST Cert
$442.73
ACI CONFIGNIST72 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA Output (Default), Duct, ± 2% Accuracy, 100 Ohm (Two Wires) RTD, Euro Enclosure, NIST Cert
$757.33
ACI CONFIGNIST71 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Duct, ± 1% Accuracy, 10,000 Ohm Thermistor (Type III), Euro Enclosure, NIST Cert
$442.73
ACI CONFIGNIST70 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Duct, ± 2% Accuracy, 10,000 Ohm Thermistor (Type III), Euro Enclosure, NIST Cert
$886.60
ACI CONFIGNIST68 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Outside Air, Sun Shield, ± 3% Accuracy, 10,000 Ohm Thermistor (Type II), Euro Enclosure, NIST Cert