04/15/2026
E+E Elektronik introduced the TDS501, a next-generation dew point sensor for demanding industrial applications. The sensor enables continuous dew point measurement with auto-calibration and without signal freezing, providing the basis for reliable 24/7 process control.
Typical process events, such as opening doors and airlocks or load changes, require a stable measurement signal. A frozen or heavily averaged signal during auto-calibration can create blind spots in the process in such environments. The TDS501 was developed around a key requirement in the control of very low dew points: auto-calibration must not interrupt the measurement signal. In highly dynamic applications, control decisions are made continuously. A signal that freezes during calibration can conceal real process deviations precisely when they matter most. To address this, the TDS501 uses an innovative new technology based on a four-element measuring method with robust capacitive sensing elements. The aim is to provide continuous dew point information for 24/7 process monitoring and stable control loops.
With the TDS501, the company extends its dew point portfolio to measuring ranges down to -94°F (-70°C) Td. This makes the sensor suitable for applications in which extremely low moisture is a critical process variable. In such processes, stable dew point monitoring helps reduce moisture-related scrap, define safety margins more precisely and control dehumidification efficiently.
Seasonal fluctuations, plant shutdowns or component failures can cause short-term condensation in compressed air systems. The TDS501 is designed to remain reliable even under such atypical conditions and to reduce condensation-related drift through practical design features. These include robust sensing elements, a sintered stainless steel filter and a durable stainless steel construction.
As standard, the TDS501 is equipped with a stainless steel filter offering a balanced ratio between protection and response time. For cleanroom applications, where particularly fast response times are required, an open filter cap is available as an option. It further improves response time and allows even earlier detection of dew point deviations.
When dew point becomes a control variable, the measurement signal must remain consistent even under changing operating conditions. The TDS501 combines high repeatability with an accuracy of ±3.6°F (±2°C) Td, supporting stable and reproducible production conditions. It is also designed so typical changes in process temperature do not affect the measurement result.
With a pressure rating of up to 1,160 psi (80 bar), the sensor can be installed directly where the process takes place. This provides a robust basis for process control and quality assurance in industrial compressed air applications.
The TDS501 is more than a sensing element in a housing. It’s a holistically developed measurement system in which the sensing element, electronics, mechanical integration, installation and adjustment are optimally matched to one another. For users, this means stable, repeatable measurement results and a reliable basis for process decisions across devices, batches and operating conditions.
About E+E Elektronik
E+E Elektronik develops and manufactures sensors and transmitters for humidity, dew point, moisture in oil, CO2, air velocity, mass flow, temperature and pressure. Hand-held meters, humidity calibration systems and calibration services complete the comprehensive product portfolio of the Austrian sensor specialist. The company has subsidiaries in China, Germany, France, Italy, Korea, the U.S. and India and is represented by over 60 sales partners worldwide. For more information, visit https://www.epluse.com.
