Dew point monitors, also known as condensation monitors or dew point sensors, play a central role in reliably monitoring the dew point and preventing condensation from forming in critical areas such as pipes, cooling surfaces, or in building automation systems. Our dew point monitors provide precise measurements of temperature and humidity conditions as well as standardized output signals for safe integration into control and monitoring systems.
We have compiled this guide to help you select, purchase, install, and operate your dew point monitor.
What is the dew point?
The dew point is the temperature at which the moisture contained in the air condenses. When this point is reached, water condenses on surfaces—for example, on pipes, cooling surfaces, or in control cabinets.
It is particularly important to monitor the dew point precisely in building automation, refrigeration and air conditioning technology, and in industrial plants. This reliably prevents the formation of condensate and the resulting moisture damage.
Dew point monitors measure the humidity and temperature conditions and calculate the current dew point. They automatically warn you as soon as critical conditions for condensate formation are reached – an important protection for your technology.
What is a dew point monitor?
A dew point monitor is a measuring device that reliably detects the risk of condensation forming. It does this by continuously measuring the temperature and humidity in its environment and calculating the current dew point.
As soon as the conditions for condensation are reached – i.e., the surface temperature approaches the dew point – the dew point monitor automatically sends a signal to the control or management system. This allows measures to be taken at an early stage to prevent moisture damage to pipes, control cabinets, cooling surfaces, or building services. In addition, integrated LEDs signal the current switching status
Dew point monitors are therefore an important component for precise dew point monitoring and reliable protection against condensation.
For which applications do I need a dew point monitor?
A dew point monitor is used wherever condensation must be reliably prevented. Condensation can cause considerable damage—for example, through corrosion, mold, short circuits, or technical malfunctions. Monitoring the dew point is therefore essential, especially for sensitive systems or in building automation.
Typical areas of application for dew point monitors are:
- Pipes for cold or cooling water
- Cooling surfaces, cooling ceilings, or evaporators
- Switch cabinets, distribution boxes, and technical enclosures
- HVAC systems (heating, ventilation, air conditioning)
- Server rooms and data centers
- Industrial plants and production environments
- Cooling zones and storage areas for temperature-sensitive goods
The use of a dew point monitor prevents damage caused by condensation at an early stage. This ensures greater operational reliability, protects the building structure, and avoids expensive downtime or repairs.
What advantages does a dew point monitor offer compared to other transmitters for humidity monitoring?
Unlike conventional humidity or temperature sensors, a dew point monitor not only measures individual values, but also continuously calculates the exact dew point. This enables it to provide early and reliable warning of condensation formation – even before visible condensation occurs.
This makes it particularly suitable for critical locations such as pipes, cooling surfaces, or control cabinets, where even small amounts of moisture can cause damage. Thanks to this precise dew point monitoring, a dew point monitor offers significantly greater safety and reliable protection against moisture damage, corrosion, short circuits, or operational disruptions. It thus makes a significant contribution to the operational reliability of building technology, systems, and sensitive infrastructure.
What types of dew point monitors are available?
Our dew point monitors are available in different technical designs to meet the various requirements in practice. This means you can find the right model for every installation situation and every control requirement.
- Dew point monitor 0-10 V
- Provides an analog output signal for direct integration into building management systems or automation systems.
- Dew point monitor switching contact
- Reliably outputs a switching signal as soon as there is a risk of condensation forming – ideal for direct control of ventilation systems or pumps.
What are the advantages of the different types of dew point monitors?
The different types of dew point monitors allow you to select the right model for your specific installation situation and technical requirements. Devices with an external circuit board offer maximum flexibility during installation, as the electronics can be installed separately to save space – ideal for tight or hard-to-reach areas.
Dew point monitors with a contact block can be mounted quickly and securely directly on pipes or cooling surfaces. This ensures particularly precise temperature transmission, which guarantees reliable dew point monitoring.
Models with a 0-10 V output are also available for easy integration into automation or control systems. Versions with changeover contact provide a clear switching signal as soon as the dew point is reached. The required switching point can be individually set using an integrated potentiometer. Devices with an integrated display offer the advantage that the current measured values can be read directly on site.
This means that a technically sensible and easy-to-install solution can be found for almost any application.
What factors influence the service life and measuring accuracy of a dew point monitor?
The service life and measuring accuracy of a dew point monitor depend largely on the ambient conditions and proper installation. Particularly aggressive media, strong temperature fluctuations, or permanently high humidity can put a strain on the sensor technology over time.
Important influencing factors are:
- A protected, suitable installation location
- Avoidance of direct sunlight or mechanical stress
- Regular inspection and maintenance, especially in dusty or humid environments
High-quality dew point monitors are characterized by robust materials, durable sensors, and stable measuring accuracy even under demanding conditions. When installed correctly and under normal conditions, the devices have a very long service life.
Where can I find all the technical data for the dew point monitors?
You can find the complete technical data for our dew point monitors directly on the respective product detail pages in our web shop. There you will find all the important information clearly arranged, such as measuring ranges, output signals, connection options, dimensions, and other technical specifications.
How is a dew point monitor installed correctly?
Proper installation of the dew point monitor is crucial for reliable operation. The device is attached directly to bare metal pipes or smooth, grease-free surfaces such as cooling ceilings using a quick-release strap. It is particularly important to ensure good thermal contact between the sensor and the surface, as this is the only way to accurately measure the dew point temperature.
In addition, the sensor should be positioned so that air can flow freely to the measuring element. This ensures that the ambient air is reliably detected and the measurement remains accurate.
The exact connection variant depends on the model selected—for example, dew point monitors with a 0-10 V output are connected directly to the control system, while variants with changeover contacts emit a clear switching signal.
