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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.

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$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.
$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.
$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.
$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.
$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.
$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.
$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
$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
$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
$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
$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
$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