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What is a Humidity / Dew Sensor?

A humidity sensor (or hygrometer) senses, measures and reports the relative humidity in the air. It therefore measures both moisture and air temperature. Relative humidity is the ratio of actual moisture in the air to the highest amount of moisture that can be held at that air temperature. The warmer the air temperature is, the more moisture it can hold. Humidity / dew sensors use capacitive measurement, which relies on electrical capacitance. Electrical capacity is the ability of two nearby electrical conductors to create an electrical field between them. The sensor is composed of two metal plates and contains a non-conductive polymer film between them. This film collects moisture from the air, which causes the voltage between the two plates to change. These voltage changes are converted into digital readings showing the level of moisture in the air.

Types of Humidity / Dew Sensors

There are many different kinds of humidity / dew sensors and at Future Electronics we stock many of the most common types categorized by accuracy, operating temperature range, humidity range, supply voltage, packaging type and supply current. The parametric filters on our website can help refine your search results depending on the required specifications.

The most common sizes for supply voltage are 3 to 5.5 V and 4.75 to 5.25 V. We also carry humidity / dew sensors with supply voltage as high as 15 V. Supply current can be between 100 µA and 15 mA, with the most common humidity / dew sensor chips using a supply current of 100 µA, 500 µA and 2.8 to 4 mA.

Humidity / Dew Sensors from Future Electronics

Future Electronics has a full chip selection of humidity / dew sensors from several manufacturers that can be used to design a relative humidity sensor, temperature and humidity monitor, moisture sensor, humidity sensor IC (integrated circuit), humidity sensor switch, digital home humidity sensor, wireless humidity sensor, digital humidity meter, soil moisture sensor, dew point sensor, remote humidity sensor or for any other application that needs humidity measurement. Simply choose from the humidity / dew sensor technical attributes below and your search results will quickly be narrowed to match your specific humidity / dew sensor application needs.

If you have a preferred brand, we deal with Digi International, GE Measurement & Control, Measurement Specialties or Vishay as manufacturers. You can easily refine your humidity / dew sensor product search results by clicking your preferred humidity / dew sensor brand below from our list of manufacturers.

Applications for Humidity / Dew Sensors:

Humidity sensors can be used as a monitoring and preventive measure in homes for people with illnesses that are affected by humidity. They are also found as part of home heating, ventilating, and air conditioning systems (HVAC systems). They can also be found in offices, cars, humidors, museums, industrial spaces and greenhouses and can be used in meteorology stations to report and predict weather. Dew sensors are used in the coating industry because the application of paint and other coatings may be extremely sensitive to dew point.

Choosing the Right Humidity / Dew Sensor:

When you are looking for the right humidity / dew sensors, with the FutureElectronics.com parametric search, you can filter the results by various attributes: by Accuracy (±5 %RH, ±3 %RH, ±2 %RH,…), Supply Current (100 µA, 500 µA , 2.8 to 4 mA,…) and Supply Voltage (up to 15 V) to name a few. You will be able to find the right semiconductor chip from several manufacturers that can be used to design a temperature and humidity monitor, moisture sensor, relative humidity sensor, humidity sensor IC (integrated circuit), wireless humidity sensor, digital humidity meter, humidity sensor switch, digital home humidity sensor, soil moisture sensor, remote humidity sensor, dew point sensor or for any other application that might need humidity or dew measurement.

Humidity / Dew Sensors in Production Ready Packaging or R&D Quantities

If the quantity of humidity / dew sensors required is less than a full reel, we offer customers many of our humidity / dew sensor products in tube, tray or individual quantities that will avoid unneeded surplus.

In addition, Future Electronics offers clients a unique bonded inventory program that is designed to eliminate potential problems that may arise from an unpredictable supply of products containing raw metals and products with erratic or long lead times. Talk with your nearest Future Electronics branch and find out more on how you and your company can avoid possible shortages.



Featured Humidity / Dew Sensor Products


Manufacturer Part Number Description
Digi International 70002335 Watchport H Series -40 to 185 C +/- 5% Temperature and Humidity Sensor
GE Measurement & Control CHIPCAP-D-50-TUBE CHIPCAP Series 0 to100% Humidity ±2 % Accuracy Digital Output Temperature Sensor
GE Measurement & Control CHIPCAP-R-50-TUBE CHIPCAP Series 0 to 100 % Humidity Ratiometric Output Temperature Sensor
GE Measurement & Control T6613 Telaire Compact 0 to 2000 ppm Diffusion Sample CO2 Module
GE Measurement & Control T6615 Telaire Compact Dual Channel Diffusion or Flow Sampling CO2 Module
GE Measurement & Control CHIPCAP-L-50-TUBE CHIPCAP Series 0 to100 % Humidity ±2 % Accuracy Linear Output Temperature Sensor
Measurement Specialties HS1101LF HS1101LF Series 10 V -60 to 140 °C Relative Humidity Sensor
Measurement Specialties HM1500LF HM1500LF Series 5 V -40 to 60 °C Analog Output Relative Humidity Sensor
Measurement Specialties HTF3226LF HTF3226LF 4.75 to 5.25 V -30 to +85 °C Temperature and Humidity Module
Measurement Specialties HTF3000LFPVH HTF3000LF Series 8 V -40 to 85 °C Temperature and Relative Humidity Sensor
Measurement Specialties HTM2500LF HTM2500 Series 5 V -30 to 70 °C Temperature and Relative Humidity Module
Measurement Specialties HTF3100 HTF3100 5 to 16 V -40 to +85 °C Temperature and Humidity Module
Measurement Specialties HTG3413CH HTG3400 Series 3.3 V -40 to 110 °C Temperature and Relative Humidity Module
Measurement Specialties HTG3415CH HTG3400 Series 5 V -40 to 110 °C Temperature and Relative Humidity Module
Measurement Specialties HTG3513CH HTG3500 Series 3.3 V -40 to 110 °C Temperature and Relative Humidity Module
Measurement Specialties HTG3515CH HTG3500 Series 5 V -40 to 110 °C Temperature and Relative Humidity Module
Measurement Specialties HTG3533PVBL HTG3500 Series 3.3 V -40 to 110 °C Temperature and Relative Humidity Module
Measurement Specialties HTM1735STD HTM1735LF Series 5.25 V -40 to 100 °C Temperature and Relative Humidity Sensor
Measurement Specialties HTM2500 HTM2500 Series 5 V -30 to 70 °C Temperature and Relative Humidity Module
Measurement Specialties HTM2500LF HTM2500 Series 5 V -30 to 70 °C Temperature and Relative Humidity Module
Measurement Specialties HTS2030SMD HTS2030SMD 10 V -60 to +140 °C Temperature and Relative Humidity Sensor
Vishay HUMIDITY-SENS-E Humidity Sensor

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