The Importance of Dew Point Measurement in Compressed Air Systems
01 What is Dew Point Temperature
Dew point is a temperature parameter, fully named dew point temperature. It refers to the temperature at which water vapor in air begins to condense if the temperature drops further.
When compressed air is cooled, its relative humidity rises. Once the temperature continues to drop to the point where the relative humidity reaches 100%, water droplets precipitate from the compressed air. This temperature is defined as the pressure dew point of compressed air.
The dew point temperature measured at standard atmospheric pressure (1 bar) is known as the atmospheric dew point or normal-pressure dew point.
02 Dew Point Meter Selection and Industry Applications
A dew point sensor, also called a dew point meter, is an instrument that directly measures dew point temperature and falls under the category of temperature and humidity sensors.
When selecting a dew point meter, users need to confirm the dew point measurement range and whether integrated pressure measurement is required. If pressure measurement is integrated, apart from outputting on-site gas pressure, the transmitter can simultaneously display humidity units that require pressure conversion calculations. For instance, while measuring pressure dew point, it can output atmospheric dew point, ppm, g/kg and other humidity parameters in real time.
Compressed Air Industry
Moisture removal is required to avoid condensation.
Air compressors compress atmospheric air, and the compressed air contains large amounts of high-temperature water vapor. Therefore, drying equipment is necessary.
Application: Measuring gas moisture content for dryers.
Pharmaceutical Industry
Most pharmaceutical products are highly sensitive to variations in humidity and moisture content. Temperature and humidity monitoring is essential to guarantee the quality and performance of end products.
Application: Stability testing, production processes, production equipment monitoring and quality assurance.
Semiconductor Industry
Semiconductor manufacturing requires optimized humidity environments, and electronic test specifications demand specific temperature and humidity conditions.
Application: Cleanroom monitoring, photoresist printing, PCB manufacturing, drying processes, production testing and storage.
Petrochemical Industry
Strict moisture control in numerous petrochemical processes maximizes production efficiency and extends equipment service life.
Application: Hydrogen recycle gas in catalytic reforming, dehydration of ethylene gas and solvents in polymer plants.
For media with dew point temperature ＞ -40°Ctd, polymer capacitive sensors deliver the best performance in terms of accuracy, response speed and long-term stability within this range, along with optimal cost performance.
Innovative self-calibration circuit design automatically compensates circuit drift caused by temperature fluctuation, contamination and aging, enabling long-term, reliable and high-precision measurement.
Advanced temperature compensation algorithms and multi-point temperature compensation calibration implemented before factory delivery significantly reduce sensor temperature drift and ensure high accuracy across a wide temperature range.
F161x Series Compact Polymer Capacitive Dew Point Transmitters
Adopting polymer thin-film capacitive sensor technology.
Suitable for applications where dew point temperature ＞ -60°Ctd: refrigerated dryers, adsorption dryers and industrial gas systems.
Features: Strong anti-contamination capability, ultra-wide measuring range, self-calibration circuit design and fast response.
For media with dew point temperature ＜ -60°Ctd, aluminum oxide sensors outperform other sensor types in accuracy, response speed and long-term stability within this range, and feature excellent contamination resistance.
Innovative self-calibration circuit design automatically compensates circuit drift caused by temperature fluctuation, contamination and aging, enabling long-term, reliable and high-precision measurement.
Advanced temperature compensation algorithms and multi-point temperature compensation calibration implemented before factory delivery significantly reduce sensor temperature drift and ensure high accuracy across a wide temperature range.
F118x Series New-Generation Compact Aluminum Oxide Dew Point Transmitters
Equipped with FixInst newly developed ultra-fast response aluminum oxide sensor technology.
Suitable for applications where dew point temperature ＜ -60°Ctd: adsorption dryers, nitrogen generators and industrial gas systems.
Features: Innovative aluminum oxide sensor technology, strong anti-contamination capability, ultra-wide measuring range, self-calibration circuit design and ultra-fast response.
QCM sensor technology represents a brand-new humidity measurement technology. Combined with newly developed humidity-sensitive materials, it achieves exceptional signal sensitivity under ultra-low humidity conditions and enables stable measurement of humidity down to ppb level.
Patented dual-QCM sensor configuration: one sensor measures humidity signals, while the other detects contamination signals. It automatically compensates measurement errors easily induced by contamination in conventional QCM humidity measurement systems.
Innovative self-calibration circuit design automatically compensates circuit drift caused by temperature fluctuation, contamination and aging, delivering long-term reliable high-precision measurement. Supported by the superior stability of QCM sensor technology, the recalibration interval can be extended to more than two years.
Advanced temperature compensation algorithms and multi-point temperature compensation calibration implemented before factory delivery significantly reduce sensor temperature drift and ensure high accuracy across a wide temperature range.
F141x Series Standard Dual-QCM Dew Point Transmitters
Utilizes newly developed FixInst-Q QCM humidity-sensitive materials and supports measurement down to -120°Ctd at ppb humidity level.
Suitable for applications where dew point temperature ＜ -80°Ctd: high-purity industrial gas, clean gas, etc.
Features: Dual-QCM sensor technology, ultra-wide measuring range, self-calibration circuit design and fast response.
Dew point is a temperature parameter, fully named dew point temperature. It refers to the temperature at which water vapor in air begins to condense if the temperature drops further.
When compressed air is cooled, its relative humidity rises. Once the temperature continues to drop to the point where the relative humidity reaches 100%, water droplets precipitate from the compressed air. This temperature is defined as the pressure dew point of compressed air.
The dew point temperature measured at standard atmospheric pressure (1 bar) is known as the atmospheric dew point or normal-pressure dew point.
02 Dew Point Meter Selection and Industry Applications
A dew point sensor, also called a dew point meter, is an instrument that directly measures dew point temperature and falls under the category of temperature and humidity sensors.
When selecting a dew point meter, users need to confirm the dew point measurement range and whether integrated pressure measurement is required. If pressure measurement is integrated, apart from outputting on-site gas pressure, the transmitter can simultaneously display humidity units that require pressure conversion calculations. For instance, while measuring pressure dew point, it can output atmospheric dew point, ppm, g/kg and other humidity parameters in real time.
Compressed Air Industry
Moisture removal is required to avoid condensation.
Air compressors compress atmospheric air, and the compressed air contains large amounts of high-temperature water vapor. Therefore, drying equipment is necessary.
Application: Measuring gas moisture content for dryers.
Pharmaceutical Industry
Most pharmaceutical products are highly sensitive to variations in humidity and moisture content. Temperature and humidity monitoring is essential to guarantee the quality and performance of end products.
Application: Stability testing, production processes, production equipment monitoring and quality assurance.
Semiconductor Industry
Semiconductor manufacturing requires optimized humidity environments, and electronic test specifications demand specific temperature and humidity conditions.
Application: Cleanroom monitoring, photoresist printing, PCB manufacturing, drying processes, production testing and storage.
Petrochemical Industry
Strict moisture control in numerous petrochemical processes maximizes production efficiency and extends equipment service life.
Application: Hydrogen recycle gas in catalytic reforming, dehydration of ethylene gas and solvents in polymer plants.
For media with dew point temperature ＞ -40°Ctd, polymer capacitive sensors deliver the best performance in terms of accuracy, response speed and long-term stability within this range, along with optimal cost performance.
Innovative self-calibration circuit design automatically compensates circuit drift caused by temperature fluctuation, contamination and aging, enabling long-term, reliable and high-precision measurement.
Advanced temperature compensation algorithms and multi-point temperature compensation calibration implemented before factory delivery significantly reduce sensor temperature drift and ensure high accuracy across a wide temperature range.
F161x Series Compact Polymer Capacitive Dew Point Transmitters
Adopting polymer thin-film capacitive sensor technology.
Suitable for applications where dew point temperature ＞ -60°Ctd: refrigerated dryers, adsorption dryers and industrial gas systems.
Features: Strong anti-contamination capability, ultra-wide measuring range, self-calibration circuit design and fast response.
For media with dew point temperature ＜ -60°Ctd, aluminum oxide sensors outperform other sensor types in accuracy, response speed and long-term stability within this range, and feature excellent contamination resistance.
Innovative self-calibration circuit design automatically compensates circuit drift caused by temperature fluctuation, contamination and aging, enabling long-term, reliable and high-precision measurement.
Advanced temperature compensation algorithms and multi-point temperature compensation calibration implemented before factory delivery significantly reduce sensor temperature drift and ensure high accuracy across a wide temperature range.
F118x Series New-Generation Compact Aluminum Oxide Dew Point Transmitters
Equipped with FixInst newly developed ultra-fast response aluminum oxide sensor technology.
Suitable for applications where dew point temperature ＜ -60°Ctd: adsorption dryers, nitrogen generators and industrial gas systems.
Features: Innovative aluminum oxide sensor technology, strong anti-contamination capability, ultra-wide measuring range, self-calibration circuit design and ultra-fast response.
QCM sensor technology represents a brand-new humidity measurement technology. Combined with newly developed humidity-sensitive materials, it achieves exceptional signal sensitivity under ultra-low humidity conditions and enables stable measurement of humidity down to ppb level.
Patented dual-QCM sensor configuration: one sensor measures humidity signals, while the other detects contamination signals. It automatically compensates measurement errors easily induced by contamination in conventional QCM humidity measurement systems.
Innovative self-calibration circuit design automatically compensates circuit drift caused by temperature fluctuation, contamination and aging, delivering long-term reliable high-precision measurement. Supported by the superior stability of QCM sensor technology, the recalibration interval can be extended to more than two years.
Advanced temperature compensation algorithms and multi-point temperature compensation calibration implemented before factory delivery significantly reduce sensor temperature drift and ensure high accuracy across a wide temperature range.
F141x Series Standard Dual-QCM Dew Point Transmitters
Utilizes newly developed FixInst-Q QCM humidity-sensitive materials and supports measurement down to -120°Ctd at ppb humidity level.
Suitable for applications where dew point temperature ＜ -80°Ctd: high-purity industrial gas, clean gas, etc.
Features: Dual-QCM sensor technology, ultra-wide measuring range, self-calibration circuit design and fast response.
