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Humidity Sensors

Essential devices for measuring humidity levels in the air, humidity sensors guarantee a level of accurate monitoring necessary for a host of industrial, environmental, and domestic applications. These sensors function by detecting water vapor in the air—more precisely, they yield readings of relative humidity, which denotes the ratio of the amount of moisture in the air compared to the maximum amount it could hold at a given temperature. Among the most commonly used types of humidity sensors are humidity-capacitive sensors, which work in virtue of the electric properties of their internal elements. Changes in capacitance levels—that is, the ability of a material to store an electric charge—resulting from different moisture levels in the air yield high-fidelity digital outputs.

Humidity sensors offer an accurate measurement of both types of humidity, which are absolutely necessary for ensuring the energy efficiency and overall optimization of a wide array of industrial processes. Take, for instance, their use in HVAC systems. Here, humidity sensors serve a crucial role both in ensuring the total system functions as intended (i.e., uses the least amount of energy possible while maintaining the proper comfort conditions of temperature and humidity for the building occupants) and in providing a level of comfort.

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ACI 151653 RH Room Thermistor
ACI 151653 RH Room Thermistor
$144.06 $377.30
ACI 151653 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R2), ± 3% Accuracy, 10,000 Ohm Thermistor (Type II), Setpoint 2.05K to 3.05K Ohms, Override, Cool/Warm Sticker
ACI 151618 RH Duct Thermistor
ACI 151618 RH Duct Thermistor
$167.58 $438.90
ACI 151618 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Duct, ± 2% Accuracy, 3,000 Ohm Thermistor, Euro Enclosure
ACI 151595 RH Duct Thermistor
ACI 151595 RH Duct Thermistor
$144.90 $379.50
ACI 151595 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Duct, ± 3% Accuracy, 20,000 Ohm Thermistor, NEMA 3R Enclosure
ACI 151591 RH TT Room
ACI 151591 RH TT Room
$219.24 $574.20
ACI 151591 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R2), ± 3% Accuracy (NIST Cert), Transmitter w/ 100 Ohm RTD (NIST Cert), 4-20mA (Temp Output) 
ACI 151590 RH Room Thermistor
ACI 151590 RH Room Thermistor
$144.06 $377.30
ACI 151590 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R), ± 3% Accuracy, 10,000 Ohm Thermistor (Type II), Setpoint 4.99K to 14.99K Ohms, Override, Cool/Warm Sticker
ACI 151433 RH Sun Shield Platinum RTDs
ACI 151433 RH Sun Shield Platinum RTDs
$364.98 $955.90
ACI 151433 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Outside Air, ± 2% Accuracy, 100 Ohm RTD (Two Wires), Sun Shield
ACI 151393 Humidistat Duct
ACI 151393 Humidistat Duct
$47.93 $78.10
ACI 151393 High velocity duct probe protector, used between 1,575 ft/min (8 m/sec) and 2,970 ft/min (15 m/sec)
ACI 151386 RH Duct Platinum RTDs
ACI 151386 RH Duct Platinum RTDs
$213.78 $559.90
ACI 151386 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
ACI 151385 RH Duct Thermistor
ACI 151385 RH Duct Thermistor
$345.24 $904.20
ACI 151385 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
ACI 151384 RH Duct Thermistor
ACI 151384 RH Duct Thermistor
$202.02 $529.10
ACI 151384 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
ACI 151383 RH Outside Air Thermistor
ACI 151383 RH Outside Air Thermistor
$181.86 $476.30
ACI 151383 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Outside Air, ± 3% Accuracy, 10,000 Ohm Thermistor (Type II), Euro Enclosure, NIST Cert
ACI 151365 RH Room Thermistor
ACI 151365 RH Room Thermistor
$177.66 $465.30
ACI 151365 Relative Humidity, RH Outputs: 0-5, 0-10 VDC & 4-20mA (Default), Room (R2), ± 2% Accuracy, 20K Ohm Thermistor, Setpoint 0 to 10K Ohms, Cool/Warm Sticker