Dew Point Transmitters for Compressed Air Systems and Industrial Drying Processes

Dew Point Transmitters for Low Dew Points

E+E dew point transmitters are suitable for installation in compressed air systems and pipelines with an operating pressure of up to 100 bar (1450 psi) and precisely measure the dew point temperature down to -60 °C Td (-76 °F Td).

As they are very small and highly accurate, E+E dew point transmitters are also ideal for OEM applications, for example for adsorption dryers, refrigeration dryers or plastic dryers.

• Smooth production processes thanks to dry compressed air.
• For compressed air systems, plastic dryers and industrial drying processes.
• Auto-calibration procedure for accurate measurement of very low dew point temperatures.

Dew Point Measurement in Compressed Air Systems

Compressed air systems in particular require continuous dew point measurement with dew point transmitters. Excessive humidity in the compressed air can result in dangerous corrosion. This causes damage to the system or loss of quality for the end product.

• Moisture in compressed air can lead to faults or failure of pneumatics, solenoid valves and nozzles.
• Moisture has a negative effect on lubrication in compressed air motors. This results in corrosion and increased wear on moving parts.
• In the case of paintwork, humid compressed air causes defects in the end result.
• Freezing moisture can lead to malfunctions in pneumatic control lines.
• Corrosion-related damage to compressed air-operated components may result in system failures.
• In the food and pharmaceutical industry, moisture can have a strong negative impact on the required sterile manufacturing conditions.

Accurate Dew Point Measurement Down to -60 °C Td (-76 °F Td)

The E+E dew point transmitters enable measurement of particularly low dew points down to -60 °C Td (-76 °F Td). A dew point sensing element specially developed for this purpose combined with an auto-calibration procedure ensures highly accurate measurement of ±2°C Td.

Monolithic Humidity and Temperature Sensing Element

The monolithic E+E dew point sensing element combines a humidity and temperature sensing element on a single glass substrate. The optimal thermal coupling between the two sensing elements is the prerequisite for the reproducible auto-calibration procedure.

Auto-Calibration for High-Precision Dew Point Measurement

During the auto-calibration, the sensor is heated up at regular intervals, so that the relative humidity on the humidity sensing element falls to 0 %. This enables exact zero point adjustment. In this way, even very low dew points can be measured with very high accuracy.

Other Features of the E+E Dew Point Transmitters

• Easy to integrate thanks to compact design and different process connections.
• Robust metal enclosure (aluminium or stainless steel) for harsh industrial environments.
• Analogue output or RS485 interface (Modbus RTU).
• Optionally with or without display.
• Easy to configure using free configuration software.
• Measurement of dew point (Td), frost point (Tf) or volume concentration (Wv).