Humidity Sensors

Humidity is the presence of water in air. The amount of water vapour in air can affect human comfort as well as many manufacturing processes in industries. The presence of water vapour also influences various physical, chemical, and biological processes.


Humidity sensors work by detecting changes that alter electrical currents or temperature in the air. There are three basic types of humidity sensors: capacitive, resistive and thermal. All three types will monitor minute changes in the atmosphere in order to calculate the humidity in the air.


A capacitive humidity sensor measures relative humidity by placing a thin strip of metal oxide between two electrodes. The metal oxide’s electrical capacity changes with the atmosphere’s relative humidity. Weather, commercial and industries are the major application areas. Resistive humidity sensors utilize ions in salts to measure the electrical impedance of atoms. As humidity changes, so does the resistance of the electrodes on either side of the salt medium. Two thermal sensors conduct electricity based upon the humidity of the surrounding air. One sensor is encased in dry nitrogen while the other measures ambient air. The difference between the two measures the humidity.


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  Manufacturer Part No Order Code Manufacturer / Description
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CY8CKIT-PSOC-024LP
CY8CKIT-PSOC-024LP - Development Kit, PSoC 1/PSoC 3/PSoC 4/PSoC 5 Family Processor Modules, LCD Display

2356856

CYPRESS SEMICONDUCTOR

Development Kit, PSoC 1/PSoC 3/PSoC 4/PSoC 5 Family Processor Modules, LCD Display

DEV KIT, PSOC 1, CY8C24X93, ARDUINO; Silicon Manufacturer:Cypress; No. of Bits:8bit; Silicon Family Name:PSOC 1; Core Architecture:M8C; Core Sub-Architecture:M8C; Silicon Core Number:CY8C24093; Kit Contents:Board, QuickStart Guide, Safety Leaflet; Produc

  • 1 available for next business day delivery
  • 718 available for 4 - 5 business days delivery
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  • 1 available for next business day delivery: Order before 6.30pm (Mon – Fri. Excluding National Holidays)
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More stock available week commencing 27/01/20

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1+ $24.11 ($27.73)

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Min: 1 Mult: 1
608-H1
608-H1 - Humidity Meter, 10% to 95% Relative Humidity, 3 %, 0.1 °C, 111 mm, 90 mm, 40 mm

3695797

TESTO

Humidity Meter, 10% to 95% Relative Humidity, 3 %, 0.1 °C, 111 mm, 90 mm, 40 mm

HYGROMETER, 10% TO 95%, 3% ACCURACY; Humidity Range:10% to 95% Relative Humidity; Accuracy %:3%; Resolution (°C):0.1°C; External Height:111mm; External Width:90mm; External Depth:40mm; Product Range:-; Battery Lifetime:8736h; Operating Temperature Max:50

  • 23 available for 4 - 5 business days delivery
  • 17 available for 5 - 6 business days delivery
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  • 23 available for 4 - 5 business days delivery: (UK stock) Order before 23:35 Mon-Fri (excluding National Holidays)
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More stock available week commencing 16/12/19

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1+ $241.00 ($277.15)

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SLWSTK6101C
SLWSTK6101C - Wireless Starter Kit, Bluetooth System-In Package Module, For BGM121, BGM123 and BGM111

2687537

SILICON LABS

Wireless Starter Kit, Bluetooth System-In Package Module, For BGM121, BGM123 and BGM111

EVAL BOARD, BLUETOOTH SYSTEM-INPACKAGE; Silicon Manufacturer:Silicon Laboratories; Silicon Core Number:EFR32, BGM121, BGM111; Kit Application Type:Wireless Development; Application Sub Type:Bluetooth; Kit Contents:Main Board, 2 x Radio Board, Add-on Boar

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  • 15 will be available for delivery on 26/10/19
  • More stock available week commencing 27/01/20

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    1+ $163.46 ($187.98)

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    VLG-MC9S12ZVC
    VLG-MC9S12ZVC - Evaluation Board, S12ZVC Mixed Signal MCU, Open Source BDM, Accelerometer, Pressure Sensor

    2473526

    NXP

    Evaluation Board, S12ZVC Mixed Signal MCU, Open Source BDM, Accelerometer, Pressure Sensor

    EVALUATION BOARD, MIXED SIGNAL MCU; Silicon Manufacturer:NXP; No. of Bits:16bit; Silicon Family Name:S12 MagniV; Core Architecture:S12Z; Core Sub-Architecture:-; Silicon Core Number:MC9S12ZVC; Kit Contents:Eval Board MC9S12ZVC, Getting Started DVD, Quick

    • 3 available for 4 - 5 business days delivery
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    1+ $289.45 ($332.87)

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    DPP901G000
    DPP901G000 - GROVE BOARD, HUMIDITY/PRESSURE SENSOR

    2726695

    SENSOR SOLUTIONS - TE CONNECTIVITY

    GROVE BOARD, HUMIDITY/PRESSURE SENSOR

    GROVE BOARD, HUMIDITY/PRESSURE SENSOR; Accessory Type:Digital Pressure & Humidity Sensor Board; For Use With:Grove System compatible expansion ports configurable for I2C communication; Product Range:-

    • 87 available for 5 - 6 business days delivery
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    • 87 available for 5 - 6 business days delivery: (US stock) Order before 20:00 Mon-Fri (excluding National Holidays)

    More stock available week commencing 3/02/20

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    1+ $22.62 ($26.01)

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    HTS221TR
    HTS221TR - Humidity Sensor, 0% to 100% RH Range, I2C, SPI, Digital, 1.7V to 3.6V, HLGA-6

    2433085

    STMICROELECTRONICS

    Humidity Sensor, 0% to 100% RH Range, I2C, SPI, Digital, 1.7V to 3.6V, HLGA-6

    HUMIDITY/TEMP SENSOR, DIGITAL, HLGA-6; Humidity Range:0% to 100% Relative Humidity; Humidity Accuracy:± 5% RH; Temperature Accuracy:± 1°C; RH Response Time:10s; Temperature Response Time:15s; Sensor Interface Type:I2C, SPI; Sensor Output Type:Digital; Se

    • 8 available for next business day delivery
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    • 49 available for 5 - 6 business days delivery
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    • 49 available for 5 - 6 business days delivery: (SG stock) Order before 13:00 Tue & before 19:00 Thu (excluding National Holidays)

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    Available until stock is exhausted

    1+ $2.33 ($2.68)

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