U.S. Ground
Parcel Shipments
See Shipping Policy

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.

Products

Sort By:
Dwyer HS-412 Humidity Switch
Dwyer HS-412 Humidity Switch
$122.62 $157.43
Dwyer HS-412 Humidity Switch is a reliable component for controlling humidity in various applications. With a temperature range of 32 to 158°F and accuracy of ±5% THC-P or ±1% RH, it ensures precise and efficient operation. Compatible with 115VAC or 230VAC power sources, it features a 3-digit green display, 16A SPDT relay output, and nonvolatile memory. Its IP64 front panel rating and ON/OFF control make it a versatile choice, capable of handling up to 1 HP.
Dwyer HS-411 Humidity Switch
Dwyer HS-411 Humidity Switch
$122.62 $157.43
Dwyer HS-411 Humidity Switch is a reliable and accurate device designed for temperature ranges from 32 to 158°F (0 to 70°C). With an accuracy of ±5% @ 20 to 90% and ±1% RH, it offers a 3-digit green display with 1/2" digits. The switch has a power requirement of either 115 VAC or 230 VAC, and it can handle humidity levels ranging from 10 to 100% RH. Its output is a 16 A SPDT relay at 250 VAC resistive, and it operates with a control type of ON/OFF. The input options include 0 to 1 V, 3 V, or 4 to 20 mA. The front panel is rated IP64, ensuring protection. Moreover, the device has a nonvolatile memory, and it can store the data without any loss.
Dwyer HS-312 Humidity Switch
Dwyer HS-312 Humidity Switch
$122.62 $157.43
Dwyer HS-312 Humidity Switch is a reliable and accurate device designed for monitoring humidity levels. With a temperature range of 32 to 158°F and a humidity range of 10 to 100% RH, it provides precise readings with THC-P accuracy of ±5% @ 20 to 90% and HS accuracy of ±1% RH. The switch operates on either 115 VAC or 230 VAC, and features a 3-digit green display, 16 A SPDT relay output, and a front panel rating of IP64. With nonvolatile memory and a control type of ON/OFF, this humidity switch is ideal for a variety of applications.
Dwyer HS-311 Humidity Switch
Dwyer HS-311 Humidity Switch
$122.62 $157.43
Dwyer HS-311 Humidity Switch is a versatile device offering accurate humidity measurement and control. With temperature range from 32 to 158°F (0 to 70°C), it provides ±5% accuracy at 20 to 90% humidity. The switch features a 3-digit green display, 16 A SPDT relay output, and nonvolatile memory. It operates with 115 VAC or 230 VAC power and includes IP64 front panel rating. Suitable for various applications, it comes with a 1 HP horsepower rating and allows for 0 to 1 V, 3 V, or 4 to 20 mA input.
Dwyer HS-112 Humidity Switch
Dwyer HS-112 Humidity Switch
$122.62 $157.43
Dwyer HS-112 Humidity Switch is a reliable and accurate device designed for controlling humidity levels. With a temperature range of 32 to 158°F (0 to 70°C) and humidity range of 10 to 100% RH, it ensures precise monitoring. Its 3-digit green display, along with 1/2" digits, provides clear readings. Power requirement options of 115 VAC or 230 VAC, and input options of 0 to 1 V, 3 V, or 4 to 20 mA, make it versatile. The device includes a 16 A SPDT relay for switching operations and nonvolatile memory for storing settings. Its compact and durable front panel is rated IP64. The HS-112 is an efficient and dependable solution suitable for a variety of applications.
Dwyer HS-111 Humidity Switch
Dwyer HS-111 Humidity Switch
$122.62 $157.43
Dwyer HS-111 Humidity Switch (SKU) is a reliable and accurate device for controlling humidity levels. With a temperature range of 32 to 158°F and humidity range of 10 to 100% RH, it offers precise measurements. The switch has a 3-digit green display with 1/2" digits and can handle 1 HP. Power requirements are 115 or 230 VAC, depending on the model. With an output of 16 A SPDT relay @ 250 VAC, it provides effective control. This humidity switch also features nonvolatile memory and an IP64 front panel rating, making it a durable and convenient option.
ACI CONFIGNIST99 A/RH2-CP-SP-010-NIST
ACI CONFIGNIST99 A/RH2-CP-SP-010-NIST
$210.00 $550.00
ACI CONFIGNIST99 Relative Humidity, RH Outputs: 0-10 VDC, Wall Plate 304SS, ± 2% Accuracy, 10,000 Ohm Thermistor (Type II), 0-10VDC, NIST Cert
ACI CONFIGNIST97 A/RH2-CP-R2-NIST
ACI CONFIGNIST97 A/RH2-CP-R2-NIST
$202.44 $530.20
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
ACI CONFIGNIST95 A/RH2-100-3W-R2-NIST
ACI CONFIGNIST95 A/RH2-100-3W-R2-NIST
$202.44 $530.20
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
ACI CONFIGNIST87 A/RH2-100-2W-R-NIST
ACI CONFIGNIST87 A/RH2-100-2W-R-NIST
$202.44 $530.20
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
ACI CONFIGNIST80 A/RH1-CP-D-NIST
ACI CONFIGNIST80 A/RH1-CP-D-NIST
$342.30 $896.50
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
ACI CONFIGNIST78 A/RH2-AN-O-NIST
ACI CONFIGNIST78 A/RH2-AN-O-NIST
$210.00 $550.00
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