| Applications | Mechanical engineering & Plant construction |
| Accuracy | 2 °C |
| Measurement range (dew point temperature) | -60 to 60 °C |
| Operating pressure range | 0 to 16 bar |
Dew point sensors
A dew point sensor is a device used to measure the dew point of air. The dew point is the temperature at which the air is saturated and water vapour begins to condense. As the air cools, the dew point can be reached and moisture can condense on surfaces.
A dew point sensor usually works on the basis of condensation nuclei, small particles on which water droplets can form. The sensor contains a fine filament or membrane coated with a condensation nucleus. As the air cools and the dew point is reached, a water droplet forms on the condensation nucleus and can be detected by a detector. The temperature at which the drop forms is the dew point.
There are also electronic dew point sensors that measure temperature and humidity and calculate the dew point. These sensors use algorithms and models to determine the dew point from the measured values.
Dew point sensors are used in many applications, including air conditioning and ventilation, industry, agriculture and meteorology. In HVAC they are used to control humidifiers and prevent condensation and mould growth. In industry, they are used to monitor processes where humidity plays a role. In agriculture, they are used to monitor humidity in greenhouses and to plan irrigation. In meteorology, they are used to predict weather conditions and monitor condensation and precipitation.
Overall, dew point sensors are useful instruments for measuring the dew point of air in various applications. Dew point measurement is an important parameter for humidity monitoring and process control in air conditioning and ventilation, industry, agriculture and meteorology.
A dew point sensor usually works on the basis of condensation nuclei, small particles on which water droplets can form. The sensor contains a fine filament or membrane coated with a condensation nucleus. As the air cools and the dew point is reached, a water droplet forms on the condensation nucleus and can be detected by a detector. The temperature at which the drop forms is the dew point.
There are also electronic dew point sensors that measure temperature and humidity and calculate the dew point. These sensors use algorithms and models to determine the dew point from the measured values.
Dew point sensors are used in many applications, including air conditioning and ventilation, industry, agriculture and meteorology. In HVAC they are used to control humidifiers and prevent condensation and mould growth. In industry, they are used to monitor processes where humidity plays a role. In agriculture, they are used to monitor humidity in greenhouses and to plan irrigation. In meteorology, they are used to predict weather conditions and monitor condensation and precipitation.
Overall, dew point sensors are useful instruments for measuring the dew point of air in various applications. Dew point measurement is an important parameter for humidity monitoring and process control in air conditioning and ventilation, industry, agriculture and meteorology.
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| Applications | Mechanical engineering & Plant construction |
| Accuracy | 1.5 °C |
| Measurement range (dew point temperature) | -40 to 60 °C |
| Measured medium | Air |
| Overall length | 100 mm |
| Probe diameters | 4 mm |
| Sensor type | Ni1000TK5000 |
| Overall length | 100 mm |
| Probe diameters | 4 mm |
| Sensor type | NTC10k (10k2) |
| Overall length | 200 mm |
| Probe diameters | 4 mm |
| Sensor type | NTC10k (10k2) |
| Overall length | 50 mm |
| Probe diameters | 4 mm |
| Sensor type | Pt1000 |
| Overall length | 100 mm |
| Probe diameters | 4 mm |
| Sensor type | Pt1000 |
| Overall length | 300 mm |
| Probe diameters | 6 mm |
| Sensor type | Pt1000 |
| Overall length | 450 mm |
| Probe diameters | 6 mm |
| Sensor type | Ni1000 |
| Overall length | 50 mm |
| Probe diameters | 6 mm |
| Sensor type | Ni1000TK5000 |
| Overall length | 100 mm |
| Probe diameters | 6 mm |
| Sensor type | NTC10k (10k2) |
| Overall length | 50 mm |
| Probe diameters | 4 mm |
| Sensor type | Ni1000TK5000 |
| Overall length | 450 mm |
| Probe diameters | 6 mm |
| Sensor type | NTC10k (10k2) |
| Overall length | 200 mm |
| Probe diameters | 6 mm |
| Overall length | 50 mm |
| Probe diameters | 6 mm |
| Signal output | 0…5 V 0 - 10 V |
| Overall length | 100 mm |
| Probe diameters | 6 mm |
| Signal output | 0…5 V 0 - 10 V |
| Overall length | 150 mm |
| Probe diameters | 6 mm |
| Signal output | 0…5 V 0 - 10 V |
| Overall length | 200 mm |
| Probe diameters | 6 mm |
| Signal output | 0…5 V 0 - 10 V |
| Overall length | 300 mm |
| Probe diameters | 6 mm |
| Signal output | 0…5 V 0 - 10 V |
| Overall length | 450 mm |
| Probe diameters | 6 mm |
| Signal output | 0…5 V 0 - 10 V |
What are dew point sensors and how do they work?
Dew point sensors are devices that measure the dew point in the air. The dew point is the temperature at which the air is saturated and water condenses. These sensors are used in various applications, such as air conditioning, building automation, weather forecasting and industrial process control.
The function of a dew point sensor is based on the principle of cooling. The sensor contains a surface that is cooled. When the air flows over the sensor, it cools the surface. When the temperature of the surface reaches the dew point of the air, moisture begins to condense on the surface. A sensor detects this condensation and measures the temperature of the surface, which then indicates the dew point of the air.
There are different types of dew point sensors, including capacitive sensors, which measure the change in electrical capacitance when moisture condenses, and optical sensors, which detect the refraction of light caused by condensation on a surface. The exact mode of operation may vary depending on the sensor variant, but the basic principle remains the same: the measurement of cooling and the associated condensation to determine the dew point.
The function of a dew point sensor is based on the principle of cooling. The sensor contains a surface that is cooled. When the air flows over the sensor, it cools the surface. When the temperature of the surface reaches the dew point of the air, moisture begins to condense on the surface. A sensor detects this condensation and measures the temperature of the surface, which then indicates the dew point of the air.
There are different types of dew point sensors, including capacitive sensors, which measure the change in electrical capacitance when moisture condenses, and optical sensors, which detect the refraction of light caused by condensation on a surface. The exact mode of operation may vary depending on the sensor variant, but the basic principle remains the same: the measurement of cooling and the associated condensation to determine the dew point.
What types of dew point sensors are there and what are they used for?
There are different types of dew point sensors that are used for different applications. Here are some examples:
1. Capacitive dew point sensor: This sensor measures the change in the capacitance of a capacitor, which varies due to the amount of moisture in the air. It is often used in air conditioning systems, industrial drying processes or in meteorology.
2. Chilled mirror dew point sensor: With this sensor, a mirror is cooled to a lower temperature until dew forms. The dew point can be determined by measuring the mirror temperature. Chilled-mirror dew point sensors are used in industry, particularly in the aerospace sector.
3. Infrared dew point sensor: This sensor uses infrared radiation to measure the dew point. It is frequently used in building automation, air conditioning systems and industrial processes.
4. Electrical dew point sensor: This type of sensor measures the electrical conductivity of a material, which varies due to the amount of moisture in the air. Electrical dew point sensors are used in various applications, such as agriculture, storage rooms, food production and material testing.
Choosing the right dew point sensor depends on the specific requirements of the application, such as the measuring range, accuracy and the environment in which it is used.
1. Capacitive dew point sensor: This sensor measures the change in the capacitance of a capacitor, which varies due to the amount of moisture in the air. It is often used in air conditioning systems, industrial drying processes or in meteorology.
2. Chilled mirror dew point sensor: With this sensor, a mirror is cooled to a lower temperature until dew forms. The dew point can be determined by measuring the mirror temperature. Chilled-mirror dew point sensors are used in industry, particularly in the aerospace sector.
3. Infrared dew point sensor: This sensor uses infrared radiation to measure the dew point. It is frequently used in building automation, air conditioning systems and industrial processes.
4. Electrical dew point sensor: This type of sensor measures the electrical conductivity of a material, which varies due to the amount of moisture in the air. Electrical dew point sensors are used in various applications, such as agriculture, storage rooms, food production and material testing.
Choosing the right dew point sensor depends on the specific requirements of the application, such as the measuring range, accuracy and the environment in which it is used.
Which measured variables can dew point sensors detect?
Dew point sensors can record the following measured variables:
1. Temperature: Dew point sensors can measure the temperature of the ambient air. This is important for calculating the dew point.
2. Relative humidity: By measuring the relative humidity, the dew point sensor can determine the point at which the air is saturated and condensation forms.
3. Dew point temperature: The main purpose of a dew point sensor is to detect the dew point temperature. This is the temperature at which the air is saturated and condensation forms.
4. Wet bulb temperature: The wet bulb temperature is the temperature that a jet of air would reach if it were cooled adiabatically to the dew point.
5. Absolute water content: Some more advanced dew point sensors can also measure the absolute water content in grams per cubic meter of air.
These measured variables are used to monitor the humidity in the air and reduce the risk of condensation and mold growth.
1. Temperature: Dew point sensors can measure the temperature of the ambient air. This is important for calculating the dew point.
2. Relative humidity: By measuring the relative humidity, the dew point sensor can determine the point at which the air is saturated and condensation forms.
3. Dew point temperature: The main purpose of a dew point sensor is to detect the dew point temperature. This is the temperature at which the air is saturated and condensation forms.
4. Wet bulb temperature: The wet bulb temperature is the temperature that a jet of air would reach if it were cooled adiabatically to the dew point.
5. Absolute water content: Some more advanced dew point sensors can also measure the absolute water content in grams per cubic meter of air.
These measured variables are used to monitor the humidity in the air and reduce the risk of condensation and mold growth.
How accurate are dew point sensors in determining the dew point?
Dew point sensors use various methods to determine the dew point. A frequently used method is the so-called condensation dew point measurement.
This method uses a sensor that has a surface that is kept at a constant temperature. This surface is cooled until water condenses on it. The point at which condensation begins is the dew point.
The sensor measures the temperature of the surface and determines the dew point based on this temperature and other ambient parameters such as air temperature and humidity.
Another method for determining the dew point is to use an infrared sensor. This sensor measures the heat radiation emitted by the surface of a sample. By analyzing the infrared radiation, the sensor can determine the dew point.
It is important to note that the accuracy of the dew point measurement depends on various factors, such as the quality of the sensor, the calibration and the ambient conditions. Therefore, the results may vary depending on the sensor and the environment.
This method uses a sensor that has a surface that is kept at a constant temperature. This surface is cooled until water condenses on it. The point at which condensation begins is the dew point.
The sensor measures the temperature of the surface and determines the dew point based on this temperature and other ambient parameters such as air temperature and humidity.
Another method for determining the dew point is to use an infrared sensor. This sensor measures the heat radiation emitted by the surface of a sample. By analyzing the infrared radiation, the sensor can determine the dew point.
It is important to note that the accuracy of the dew point measurement depends on various factors, such as the quality of the sensor, the calibration and the ambient conditions. Therefore, the results may vary depending on the sensor and the environment.
Which industries or applications particularly benefit from the use of dew point sensors?
The use of dew point sensors is advantageous in various industries and applications. Here are some examples:
1. Air conditioning and heating: Dew point sensors are used in air conditioning and heating systems to measure humidity and optimize temperature and humidity control.
2. Food and beverage industry: In the food and beverage industry, precise humidity control is important to ensure the quality and shelf life of products. Dew point sensors help to monitor the optimum humidity level in storage rooms, refrigerators or freezers.
3. Pharmaceutical industry: In the pharmaceutical industry, humidity is often strictly controlled to ensure the effectiveness and stability of medicines. Dew point sensors play an important role here in monitoring humidity in production and storage areas.
4. Power generation and transmission: In power stations and substations, monitoring humidity is extremely important in order to prevent corrosion and damage to electrical systems. Dew point sensors help to control the humidity in these environments.
5. Building automation: Dew point sensors are used in intelligent building systems to monitor the humidity in rooms and adjust the ventilation and air conditioning systems accordingly. This helps to improve the indoor climate and energy efficiency.
6. Meteorology and environmental monitoring: Dew point sensors play an important role in measuring and monitoring humidity in the atmosphere. They are used in weather stations, environmental monitoring systems and other meteorological applications.
This list is not exhaustive, as dew point sensors can be useful in many other industries and applications where precise humidity measurement and control is required.
1. Air conditioning and heating: Dew point sensors are used in air conditioning and heating systems to measure humidity and optimize temperature and humidity control.
2. Food and beverage industry: In the food and beverage industry, precise humidity control is important to ensure the quality and shelf life of products. Dew point sensors help to monitor the optimum humidity level in storage rooms, refrigerators or freezers.
3. Pharmaceutical industry: In the pharmaceutical industry, humidity is often strictly controlled to ensure the effectiveness and stability of medicines. Dew point sensors play an important role here in monitoring humidity in production and storage areas.
4. Power generation and transmission: In power stations and substations, monitoring humidity is extremely important in order to prevent corrosion and damage to electrical systems. Dew point sensors help to control the humidity in these environments.
5. Building automation: Dew point sensors are used in intelligent building systems to monitor the humidity in rooms and adjust the ventilation and air conditioning systems accordingly. This helps to improve the indoor climate and energy efficiency.
6. Meteorology and environmental monitoring: Dew point sensors play an important role in measuring and monitoring humidity in the atmosphere. They are used in weather stations, environmental monitoring systems and other meteorological applications.
This list is not exhaustive, as dew point sensors can be useful in many other industries and applications where precise humidity measurement and control is required.
How can dew point sensors be used to prevent condensation and moisture damage?
Dew point sensors can be used to prevent condensation and moisture damage by monitoring humidity and temperature and calculating the dew point. As soon as the dew point is reached, there is a risk of condensation, which can lead to moisture damage.
By using dew point sensors, various measures can be taken to prevent condensation and moisture damage:
1. Ventilation: When the dew point is reached, the sensor can send a signal to a ventilation system to introduce fresh air and reduce the humidity.
2. Heating: Dew point sensors can also be coupled with heating systems to increase the temperature and thus prevent the dew point.
3. Insulation: The use of dew point sensors can improve the insulation of components in order to minimize the formation of condensation.
4. Moisture control: Dew point sensors can also be used in conjunction with humidity control devices to keep the relative humidity at an optimum level and thus prevent the formation of condensation.
5. Alerting: When the dew point is reached, the sensor can send an alarm or warning signal to inform users of the risk of condensation and moisture damage.
The use of dew point sensors can effectively prevent condensation and moisture damage, which leads to a longer service life for building components and improved indoor air quality.
By using dew point sensors, various measures can be taken to prevent condensation and moisture damage:
1. Ventilation: When the dew point is reached, the sensor can send a signal to a ventilation system to introduce fresh air and reduce the humidity.
2. Heating: Dew point sensors can also be coupled with heating systems to increase the temperature and thus prevent the dew point.
3. Insulation: The use of dew point sensors can improve the insulation of components in order to minimize the formation of condensation.
4. Moisture control: Dew point sensors can also be used in conjunction with humidity control devices to keep the relative humidity at an optimum level and thus prevent the formation of condensation.
5. Alerting: When the dew point is reached, the sensor can send an alarm or warning signal to inform users of the risk of condensation and moisture damage.
The use of dew point sensors can effectively prevent condensation and moisture damage, which leads to a longer service life for building components and improved indoor air quality.
What technological developments are currently available in the field of dew point sensors and how do they influence their performance?
There are currently several technological developments in the field of dew point sensors that influence their performance:
1. Capacitive dew point sensors: Capacitive dew point sensors use the change in capacitance between two electrodes to measure the dew point. Thanks to improvements in electrode design and signal processing technology, capacitive sensors can now offer greater accuracy and stability.
2. Optical dew point sensors: Optical sensors use the absorption of moisture in an optical medium to measure the dew point. By using advanced optical materials and technologies, they can offer high accuracy and fast response times.
3. Resistance-based dew point sensors: Resistance-based sensors use the change in the electrical resistance of a material as a function of humidity to measure the dew point. Improvements in material technology and sensor coating have improved the accuracy and long-term stability of these sensors.
4. Microelectromechanical systems (MEMS): MEMS technology enables the integration of dew point sensors in small, compact components. These sensors offer high sensitivity, fast response times and low energy consumption.
5. Wireless and networked sensors: By integrating wireless communication technology, dew point sensors can be integrated into networked systems. This enables remote monitoring and control of the sensors as well as integration into IoT platforms.
These technological developments have improved the performance of dew point sensors by enabling higher accuracy, faster response times, lower energy consumption, greater reliability and better integration into networked systems. This means that dew point sensors can be used in a wide range of applications, such as air quality monitoring, air conditioning in buildings, process control in industry and weather forecasting.
1. Capacitive dew point sensors: Capacitive dew point sensors use the change in capacitance between two electrodes to measure the dew point. Thanks to improvements in electrode design and signal processing technology, capacitive sensors can now offer greater accuracy and stability.
2. Optical dew point sensors: Optical sensors use the absorption of moisture in an optical medium to measure the dew point. By using advanced optical materials and technologies, they can offer high accuracy and fast response times.
3. Resistance-based dew point sensors: Resistance-based sensors use the change in the electrical resistance of a material as a function of humidity to measure the dew point. Improvements in material technology and sensor coating have improved the accuracy and long-term stability of these sensors.
4. Microelectromechanical systems (MEMS): MEMS technology enables the integration of dew point sensors in small, compact components. These sensors offer high sensitivity, fast response times and low energy consumption.
5. Wireless and networked sensors: By integrating wireless communication technology, dew point sensors can be integrated into networked systems. This enables remote monitoring and control of the sensors as well as integration into IoT platforms.
These technological developments have improved the performance of dew point sensors by enabling higher accuracy, faster response times, lower energy consumption, greater reliability and better integration into networked systems. This means that dew point sensors can be used in a wide range of applications, such as air quality monitoring, air conditioning in buildings, process control in industry and weather forecasting.