Humidity Modules & Sensors

The most critical task in humidity measurement is a stable detection of a correct humidity level within an acceptable response time. Coverage of the full measurement range from 0 % RH to 100 % RH is mandatory. Needless to say, stability of the humidity sensor should remain unchanged, even if operated under elevated conditions over an extended period. Temperature and environmental influences of the individual application have significant impact on the sensor's long-term stability. Through specially developed polymers and use of high quality materials, our humidity sensors and modules address the challenges of temperature cycling and exposure to aggressive chemicals.

Innovative Sensor Technology IST AG offers a broad range of fully calibrated humidity and temperature modules as well as capacitive humidity sensors. With many years of experience, IST AG also offers development of customer-specific applications in terms of technology development and consultation. As part of the standard development process, IST AG offers support at the point of implementation - this way we ensure the best solution for specific applications. 

Humidity Modules

HYT

Mechanically robust and with a chemical and condensed waterproof sensing area, the digital IST AG HYT humidity modules offer a wide application window and an optimal price-performance ratio. Precisely calibrated, the HYT modules deliver an outstanding accuracy and excellent long-term stability even at high humidity - ideal for sophisticated mass applications, industrial handheld devices and precise humidity transmitters.

We look forward to receiving your humidity module request!

Application Note Humidity HYT Modules

  • HYT 271 - Optimal for handheld instruments, transmitters, measuring technology and HVAC applications

    Mechanically robust and with a chemical and condensed waterproof sensing area, the digital IST AG HYT 271 humidity modules offer the widest application window and an optimal price-performance ratio. Precisely calibrated, the HYT 271 delivers an accuracy of ±1.8 % RH and ±0.2 °C and combines the advantages of a precise, capacitive polymer humidity sensor with the high integration density and functionality of an ASIC. The digital software integrated in the module processes the measured data and delivers the physical parameters of relative humidity and temperature over the I²C compatible interface as digital values. The HYT 271 humidity module is therefore fully interchangeable without adjustment and both the linearity error as well as temperature drift are corrected “on-chip” through computation resulting in an outstanding accuracy over a wide range of applications. 

    Further advantages of the HYT 271 digital humidity module include:

    • Calibrated and temperature compensated
    • Fast response time
    • Excellent humidity/temperature accuracy and stability
    • High chemical resistance
    • Wide humidity and temperature range (0 % RH to 100 % RH and -40 °C to +125 °C)
    • Very low drift
    • I2C protocol (address 0x28 or alternative address)
    • Very stable at high humidity
    • Interchangeable without adjustment

    The digital IST AG HYT 271 humidity module is suitable for various handheld measurement instruments, humidity transmitters, industrial applications, measuring technology and HVAC applications.

    For more information see:

    Data Sheet Humidity HYT 271

    Application Note Humidity HYT Modules

    Furthermore IST AG offers modules for evaluation of the HYT modules:

    HYT LabKit with USB-Interface - Optimal as Plug & Play for a fast evaluation of the HYT modules

    The IST AG HYT LabKit with USB-Interface offers an easy evaluation of the HYT humidity modules through a USB-Interface. The measured temperature and humidity values are displayed through a graphic presentation. 

    Further advantages of the IST AG HYT LabKit include:

    • Dew/frost point calculation and further humidity parameters
    • Plug-in connection adapter included
    • Evaluation software RECORDER and PCLOG for Windows included

    Please note that there is only one module per LabKit applicable.

    For more information see:

     Data Sheet Humidity HYT LabKit

    HYT LCD Module - Optimal for evaluation and demonstration of the HYT modules

    The IST AG HYT LCD Module offers an easy usage with an automatic address determination of the connected HYT humidity module. The HYT LCD Module delivers a correction of humidity and temperature measurement values and a permanent storage of the correction values.

    Further advantages of the IST AG HYT LCD Module include:

    • Automatic switchover (internal / external)
    • Automatic address determination of connected HYT module
    • I2C address change possible
    • External or internal power supply

    For more information see:

    Data Sheet Humidity HYT LCD Module

    HYT 271 humidity module HYT LCD Module (evaluation)
  • HYT 221 - Optimal for meteorology, industrial drying systems, agriculture and medical devices

    Mechanically robust and with a chemical and condensed waterproof sensing area, the IST AG HYT 221 humidity module with a round stainless steel casing can easily be fitted into housing openings and can be sealed against the wall with the use of an O-ring. Combined with the waterproof metal filter, it results into an assembly that is splash waterproof and enables a sealed housing construction while providing a high dynamic responsiveness. Precisely calibrated, the HYT 221 delivers an accuracy of ±1.8 % RH and ±0.2 °C and combines the advantages of a precise, capacitive polymer humidity sensor with the high integration density and functionality of an ASIC. The digital software integrated in the module processes the measured data and delivers the physical parameters of relative humidity and temperature over the I²C compatible interface as digital values. The HYT 221 humidity module is fully interchangeable without adjustment and both the linearity error as well as temperature drift are corrected “on-chip” resulting in outstanding accuracy over a wide range of applications. 

    Further advantages of the HYT 221 digital humidity module include:

    • Calibrated and temperature compensated
    • Excellent humidity/temperature accuracy and stability
    • High chemical resistance
    • I2C protocol (address 0x28 or alternative address)
    • Wide humidity and temperature range (0 % RH to 100 % RH and -40 °C to +125 °C)
    • Very low drift
    • Very stable at high humidity
    • Interchangeable without adjustments

    The IST AG digital HYT 221 humidity module is suitable for various meteorology, industrial drying systems, medical devices and agriculture applications.

    For more information see:

    Data Sheet Humidity HYT 221

    Application Note Humidity HYT Modules

    Furthermore IST AG offers modules for evaluation of the HYT modules:

    HYT LabKit with USB-Interface - Optimal as Plug & Play for a fast evaluation of the HYT modules

    The IST AG HYT LabKit with USB-Interface offers an easy evaluation of the HYT humidity modules through a USB-Interface. The measured temperature and humidity values are displayed through a graphic presentation. 

    Further advantages of the IST AG HYT LabKit include:

    • Dew/frost point calculation and further humidity parameters
    • Plug-in connection adapter included
    • Evaluation software RECORDER and PCLOG for Windows included

    Please note that there is only one module per LabKit applicable.

    For more information see:

     Data Sheet Humidity HYT LabKit

    HYT LCD Module - Optimal for evaluation and demonstration of the HYT modules

    The IST AG HYT LCD Module offers usability due to the automatic address determination of the connected HYT humidity module. The HYT LCD Module delivers a correction of humidity and temperature measurement values and a permanent storage of the correction values.

    Further advantages of the IST AG HYT LCD Module include:

    • Automatic switchover (internal/external)
    • Automatic address determination of connected HYT module
    • I2C address change possible
    • External or internal power supply

    For more information see:

    Data Sheet Humidity HYT LCD Module

    HYT 221 humidity moduleHYT LCD Module
  • HYT 939 - Optimal for medical and drying systems, autoclaves, pressure dew point measurement and laboratory applications

    Mechanically robust and with a chemical and condensed waterproof sensing area, the digital IST AG HYT 939 humidity module excels with the special robust construction withstanding peak loading at high temperatures. The HYT 939 is also ideal for high pressure applications and is also offered with a pressure tight packaging. Precisely calibrated, the HYT 939 delivers an accuracy of ±1.8 % RH and ±0.2 °C and combines the advantages of a precise, capacitive polymer humidity sensor with the high integration density and functionality of an ASIC. The digital software integrated in the module processes the measured data and delivers the physical parameters of relative humidity and temperature over the I²C compatible interface as digital values. The HYT 939 humidity module is therefore fully interchangeable without adjustment and both the linearity error as well as temperature drift are corrected “on-chip” through computation resulting in an outstanding accuracy over a wide range of applications. 

    Further advantages of the HYT 939 digital humidity module include:

    • Calibrated and temperature compensated
    • Excellent humidity/temperature accuracy and stability
    • High chemical resistance
    • I2C protocol (address 0x28 or alternative address)
    • Wide humidity and temperature range (0 % RH to 100 % RH and -40 °C to +125 °C)
    • Very low drift
    • Very stable at high humidity
    • Interchangeable without adjustments
    • Pressure-resistant version (up to 16 bar) upon request

    The digital HYT 939 humidity module is suitable for various medical systems, autoclaves, pressure dew point measurement (pressure tight packaging required), drying systems and laboratory applications.

    For more information see:

     Data Sheet Humidity HYT 939

    Application Note Humidity HYT Modules

    Innovative Sensor Technology IST AG also offers modules for evaluation of the HYT modules:

    HYT LabKit with USB-Interface - Optimal as Plug & Play for a fast evaluation of the HYT modules

    The Innovative Sensor Technology IST AG HYT LabKit with USB-Interface offers a simple evaluation of the HYT humidity modules through a USB-Interface. The measured temperature and humidity values are displayed through a graphic presentation. 

    Further advantages of the IST AG HYT LabKit include:

    • Dew/frost point calculation and further humidity parameters
    • Plug-in connection adapter included
    • Evaluation software RECORDER and PCLOG for Windows included

    Please note that there is only one module per LabKit applicable.

    For more information see:

    Data Sheet Humidity HYT LabKit

    HYT 939 humidity module

Humidity Sensors

Capacitive RH sensors consist of a ceramic substrate on which a thin film of polymer is deposited between two conductive electrodes. The sensing surface is coated with a microporous metal electrode, allowing the polymer to absorb moisture while protecting it from contamination and exposure to condensation. As the polymer absorbs water, the dielectric constant changes incrementally and is nearly directly proportional to the relative humidity of the surrounding environment. Thus, by monitoring the change in capacitance, relative humidity can be derived.

Innovative Sensor Technology IST AG humidity sensors are capable of measuring 0 % RH to 100 % RH and operating at temperature ranges of -80 °C to +190 °C. The humidity product line features sensors with excellent linearity, low hysteresis, fast response times, and high chemical resistance.

We look forward to receiving your humidity sensor request!

  • P14-W - Optimal for various humidity applications

    Thanks to its linear characteristics and its wide range of potential uses, the IST AG P14-W humidity sensor is the ideal solution for universal humidity measuring tasks in a wide variety of different applications. The sensor is capable of measuring 0 % RH to 100 % RH (maximal dew point +85 °C) with a capacitance of 150 pF ±50 pF (wired) / 180 pF ±50 pF (SMD) (at 30 % RH and +23 °C) and operates within a temperature range of -50 °C to +150 °C.

    Further advantages of the P14-W capacitive RH sensor include:

    • High chemical resistance
    • Very low drift
    • Wide temperature range
    • High humidity stability
    • Resistance to condensation
    • Fast recovery time
    • Customer-specific sensor available upon request

    The IST AG P14-W humidity sensor is available with CuP-SIL-wire post-plated with Sn, Au/Cu-wire or as SMD for automatic packaging as standard.

    For more information see:

    Data Sheet Humidity P14-W

    P14-W humidity sensor
  • P14 Rapid - Optimal for weather balloons and radiosondes

    Stable and robust humidity sensors with ultra-fast response time are often required in applications involving meteorology – not only in normal conditions, but also under elevated environmental constraints such as extremely low temperatures, high radiation levels and under extreme condensation. Such applications need fully tailored solutions, such as those provided by the Innovative Sensor Technology IST AG P14 Rapid. The P14 Rapid humidity sensor combines speed and full range operation in an ideal way. The sensor is capable of measuring 0 % RH to 100 % RH (maximal dew point +85 °C) with a capacitance of 140 pF ±40 pF (wired) / 180 pF ±50 pF (SMD) (at 30 % RH and +23 °C) and operates within a temperature range of -80 °C to +150 °C.

    Further advantages of the P14 Rapid capacitive RH sensor include:

    • Ultra-fast response time
    • Temperature shock resistant
    • Condensation resistant
    • Fast recovery time
    • High humidity stability
    • Wide temperature range
    • Customer-specific sensor available upon request

    The IST AG P14 Rapid humidity sensor is available with CuP-SIL-wire post-plated with Sn, Au/Cu-wire or as SMD for automatic packaging as standard.

    For more information see:

    Data Sheet Humidity P14-RAPID

    P14 Rapid humidity sensor
  • P14 FemtoCap - Optimal for automotive and white good applications

    Despite its very small size, the IST AG FemtoCap humidity sensor has excellent sensor characteristics that are required in areas such as automotive and white good applications. In combination with external electronics, it offers an excellent cost to performance ratio. The FemtoCap is an optimal cost efficient sensor solution and is capable of measuring 0 % RH to 100 % RH (maximal dew point +85 °C) with a capacitance of 180 pF ±50 pF (at 30 % RH and +23 °C) and operates within a temperature range of -50 °C to +150 °C.

    Further advantages of the P14 FemtoCap capacitive RH sensor include:

    • High chemical resistance
    • Very low drift
    • Wide temperature range
    • Excellent price-performance ratio
    • Resistance to condensation
    • Solderable and bondable (fully automated assembly)
    • Fast recovery time
    • Customer-specific sensor available upon request

    The IST AG P14 FemtoCap humidity sensor is available as SMD for automatic packaging as standard configuration.

    For more information see:

    Data Sheet Humidity P14-FemtoCap

    P14 FemtoCap humidity sensor
  • P14 2FW Thermo - Optimal for dew point applications

    The IST AG P14 2FW Thermo was designed especially for dew point applications and humidity generators. The favorable one-chip solution consists of a capacitive humidity sensor, based on the standard P14 sensor, together with a heating element, which, at the same time, works as a valid Pt100 sensor. The sensor achieves outstanding measurement accuracy due to the optimal thermal coupling which enables a fast recovery time. Due to heating from the Pt100, humidity is quickly released and enables fast re-measurements after condensation. Furthermore, the Pt100 sensor heats out gases or vapors from the polymer, which might cause a drift of the humidity signal. The P14 2FW Thermo humidity sensor is capable of measuring 0 % RH to 100 % RH (maximal dew point +85 °C) with a capacitance of 150 pF ±50 pF (at 30 % RH and +23 °C) and operates within a temperature range of -50 °C to +150 °C.

    Further advantages of the P14 2FW Thermo capacitive RH sensor include:

    • Fast recovery time
    • Heating of humidity sensor (humidity sensor and heater on one chip)
    • Temperature measurement on-chip
    • Very low drift
    • Wide temperature range
    • High humidity stability
    • Condensation resistance
    • High chemical resistance
    • Customer-specific sensor available upon request

    The IST AG P14 2FW Thermo humidity sensor is available with Ni/Au-flat wire as standard configuration.

    For more information see:

    Data Sheet Humidity P14 2FW THERMO

    P14 2FW Thermo humidity sensor
  • MK33-W - Optimal for oil measurement applications

    The IST AG MK33-W capacitive RH humidity sensor has been developed especially for high-end measuring applications and extreme environments making it optimal for oil applications. The MK33 excels through its extremely high humidity and temperature working range and its outstanding chemical resistance. The humidity sensor is capable of measuring 0 % RH to 100 % RH (maximal dew point +95 °C) with a capacitance of 300 pF ±40 pF (at 30 % RH and +23 °C) and operates within a temperature range of -40 °C to +190 °C.

    Further advantages of the MK33-W capacitive RH sensor include:

    • High chemical resistance
    • Very low drift
    • Wide temperature range
    • High humidity stability
    • Condensation resistant
    • Suitable for extreme environments
    • Fast recovery time
    • Customer-specific sensor available upon request

    The IST AG MK33-W humidity sensor is available with CuP-SIL-wire post-plated with Sn or Au/Cu-wire as standard configuration.

    For more information see:

    Data Sheet Humidity MK33-W

    MK33-W humidity sensor
  • K5-W - Optimal for low humidity measurement

    With its small dimension and high sensitivity, the IST AG K5-W capacitive RH humidity sensor was developed for applications where an accurate measurement in low humidity ranges is required. The sensor is characterized by the outstanding stability in low humidity, very low drift and a high chemical resistance. With its excellent sensor characteristics, the K5-W is the optimal choice for low humidity environments. The sensor is capable of measuring 0 % RH to 100 % RH (maximal dew point +85 °C) with a capacitance of 200 pF ±50 pF (at 30 % RH and +23 °C) and operates within a temperature range of -40 °C to +150 °C.

    Further advantages of the K5-W capacitive RH sensors include:

    • Fast recovery time
    • Very stable at low humidity
    • Condensation resistant
    • High chemical resistance
    • Very low drift
    • Wide temperature range
    • Customer-specific sensor available upon request

    The IST AG K5-W humidity sensor is available with CuP-SIL wire post-plated with Sn as standard configuration.

    For more information see:

    Data Sheet Humidity K5-W

    K5-W humidity sensor