Humidity Sensors

Industrial environmental sensors and transmitters including humidity sensors, temperature probes, and air quality or environmental monitoring transmitters used for measuring conditions in HVAC systems and industrial environments.

Humidity sensors are used to measure the amount of water vapor present in the air, providing critical data for environmental monitoring and control systems. RSP Supply carries a full line of humidity sensors designed to measure relative humidity and, in some configurations, absolute humidity, temperature, or dew point. These sensors are commonly used in industrial facilities, HVAC systems, cleanrooms, laboratories, storage areas, and agricultural environments where moisture control is essential.

High-performance humidity sensors are engineered for accuracy, stability, and repeatable performance across changing temperature and moisture conditions. By continuously monitoring humidity levels, these sensors enable automated systems to regulate ventilation, cooling, heating, and dehumidification processes. This helps maintain consistent environmental conditions that protect sensitive equipment, preserve product quality, and improve energy efficiency.

Humidity sensors are available using different sensing technologies, including capacitive and resistive designs. Capacitive humidity sensors are widely used due to their broad measurement range and long-term stability, while resistive sensors provide reliable detection through changes in electrical resistance caused by moisture. Selecting the appropriate sensor depends on accuracy requirements, environmental exposure, and application-specific performance needs.

Found 99 items
Normally In Stock
ACI 126182 A/RH1-TT1K-O-4X-4 Outside Air NEMA 4X Humidity
Free U.S Ground shipping
$528.70
$440.58
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ACI 127665 A/RH1-TT1K-D-4X-4 NEMA 4X Humidity
Free U.S Ground shipping
$532.22
$443.52
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ACI 130480 A/RH1-1.8K-D Humidity
Free U.S Ground shipping
$448.56
$373.80
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ACI 130822 A/RH1-R2 Room Humidity
Free U.S Ground shipping
$429.91
$358.26
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ACI 131549 A/RH1-AN-R2 Humidity
Free U.S Ground shipping
$437.47
$364.56
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ACI 131817 A/RH1-1.8K-O Humidity
Free U.S Ground shipping
$457.13
$380.94
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ACI 132652 A/RH1-100-2W-D Humidity
Free U.S Ground shipping
$448.56
$373.80
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ACI 132759 A/RH1-TTM100-D-4X-1 Duct NEMA 4X Humidity
Free U.S Ground shipping
$587.16
$489.30
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ACI 132882 A/RH1-1K-NI-D Duct Humidity
Free U.S Ground shipping
$448.56
$373.80
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ACI 134171 A/RH1-TT1K-R2-4 Room Humidity
Free U.S Ground shipping
$512.06
$426.72
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ACI 135075 A/RH1-20K-R2 Humidity
Free U.S Ground shipping
$437.47
$364.56
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ACI 135297 A/RH1-TT1K-R2-2 Room Humidity
Free U.S Ground shipping
$512.06
$426.72
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ACI 135525 A/RH1-TT100-D-4X-4 Duct NEMA 4X Humidity
Free U.S Ground shipping
$532.22
$443.52
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ACI 136041 A/RH1-100-2W-O Humidity
Free U.S Ground shipping
$457.13
$380.94
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ACI 136260 A/RH1-20K-D Humidity
Free U.S Ground shipping
$448.56
$373.80
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ACI 136342 A/RH1-1K-NI-O Humidity
Free U.S Ground shipping
$457.13
$380.94
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ACI 136483 A/RH1-10K-E1-D Humidity
Free U.S Ground shipping
$448.56
$373.80
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ACI 136901 A/RH1-CP-R2 Humidity
Free U.S Ground shipping
$437.47
$364.56
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ACI 137241 A/RH1-TT1K-R-2 Room Humidity
Free U.S Ground shipping
$512.06
$426.72
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ACI 138114 A/RH1-AN-BC-R2 Humidity
Free U.S Ground shipping
$437.47
$364.56
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ACI 138340 A/RH1-TT1K-D-4X-1 Duct NEMA 4X Humidity
Free U.S Ground shipping
$532.22
$443.52
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ACI 138405 A/RH1-TTM1K-D-4X-4 Duct NEMA 4X Humidity
Free U.S Ground shipping
$587.16
$489.30
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ACI 138406 A/RH1-TTM1K-D-4X-2 Duct NEMA 4X Humidity
Free U.S Ground shipping
$587.16
$489.30
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ACI 139211 A/RH1-O-BB Outside Air NEMA 3R Humidity
Free U.S Ground shipping
$445.54
$371.28
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ACI 139340 A/RH1-TT1K-D-BB-2 Duct NEMA 3R Humidity
Free U.S Ground shipping
$519.62
$433.02
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ACI 139347 A/RH1-10KS-R2 Humidity
Free U.S Ground shipping
$437.47
$364.56
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ACI 139391 A/RH1-1K-NI-R Humidity
Free U.S Ground shipping
$436.46
$363.72
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ACI 142597 A/RH1-TT1K-D-4X-2 Duct NEMA 4X Humidity
Free U.S Ground shipping
$532.22
$443.52
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ACI 142688 A/RH1-TTM100-O-4X-4 Outside Air NEMA 4X Humidity
Free U.S Ground shipping
$584.14
$486.78
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ACI 142745 A/RH1-10KS-O Outside Air Humidity
Free U.S Ground shipping
$457.13
$380.94
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ACI 142918 A/RH1-TT100-R2-4 Room Humidity
Free U.S Ground shipping
$512.06
$426.72
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ACI 144239 A/RH1-TT100-O-4X-4 Outside Air NEMA 4X Humidity
Free U.S Ground shipping
$528.70
$440.58
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ACI 144368 A/RH1-D-4X Duct NEMA 4X Humidity
Free U.S Ground shipping
$450.07
$375.06
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ACI 144491 A/RH1-20K-R2-NIST Room Humidity
Free U.S Ground shipping
$500.47
$417.06
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ACI 144551 A/RH1-10KS-D Duct Humidity
Free U.S Ground shipping
$448.56
$373.80
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ACI 144708 A/RH1-CP-R-NIST Room Humidity
Free U.S Ground shipping
$492.41
$410.34
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ACI 144807 A/RH1-TTM1K-RP2-20'-4X-4 Humidity
Free U.S Ground shipping
$980.78
$817.32
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ACI 144841 A/RH1-TTM1K-RP2-10'-4X-4 Humidity
Free U.S Ground shipping
$760.03
$633.36
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ACI 144947 A/RH1-TTM1K-RP2-10'-4X-2 Humidity
Free U.S Ground shipping
$773.14
$644.28
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ACI 144953 A/RH1-20K-D-NIST Duct Humidity
Free U.S Ground shipping
$503.50
$419.58
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ACI 144961 A/RH1-1K-3W-O Outside Air Humidity
Free U.S Ground shipping
$457.13
$380.94
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ACI 145166 A/RH1-TTM1K-RP2-3'-4X-4 Humidity
Free U.S Ground shipping
$677.88
$564.90
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ACI 145377 A/RH1-TTM1K-RP2-6'-4X-4 Humidity
Free U.S Ground shipping
$815.47
$679.56
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ACI 145952 A/RH1-100-3W-D-NIST Duct Humidity
Free U.S Ground shipping
$503.50
$419.58
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ACI 146263 A/RH1-1K-NI-R2-NIST Room Humidity
Free U.S Ground shipping
$490.90
$409.08
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ACI 147030 A/RH1-50K-R2 Room Humidity
Free U.S Ground shipping
$437.47
$364.56
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ACI 147033 A/RH1-50K-D Duct Humidity
Free U.S Ground shipping
$448.56
$373.80
Normally In Stock
ACI 147036 A/RH1-50K-O Outside Air Humidity
Free U.S Ground shipping
$457.13
$380.94

More Information about Humidity Sensors

In high-performance applications, humidity sensors are calibrated for accuracy and stability, which allows them to perform consistently in warm and wet-to-dry environments. These devices are used to monitor humidity levels in cleanrooms, storage facilities, greenhouses, and laboratories. By enabling systems to automatically adjust ventilation, air conditioning, or dehumidification functions, these same sensors contribute to better comfort, product quality, and energy efficiency. The ability to continuously measure the water vapor content in these dynamic environments gives the sensors an important role in maintaining the balance of temperature and humidity.

FAQs

Q: What is a humidity sensor, and what does it measure?
A humidity sensor measures the amount of moisture in the air, typically reported as relative humidity (RH). Some sensors also measure temperature or dew point to support environmental control systems.

Q: What are humidity sensors commonly used for?
Humidity sensors are used in HVAC systems, building automation, manufacturing, cleanrooms, data centers, agriculture, pharmaceuticals, food storage, and other environments where moisture control affects performance or safety.

Q: What types of humidity sensors are available?
Common humidity sensor types include capacitive, resistive, and thermal conductivity-based sensors. Capacitive sensors are the most widely used due to their accuracy and stability.

Q: How accurate are humidity sensors?
Humidity sensor accuracy typically ranges from ±1% to ±5% RH, depending on sensor quality, design, and operating conditions.

Q: Do humidity sensors require calibration and maintenance?
Yes, periodic calibration and inspection are recommended to maintain accuracy and detect sensor drift or contamination over time.

Why Buy Humidity Sensors from RSP Supply

RSP Supply offers a reliable selection of humidity sensors designed for precise environmental monitoring in industrial and commercial applications. Our products support accurate humidity measurement, system efficiency, and long-term reliability. Customers rely on RSP Supply for technically sound sensor solutions, knowledgeable support, and dependable sourcing for environmental control components