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Dew Point Sensors

S211 / S215 / S220 – Industrial Dew Point Sensors (–100 to +50 °C Td)

High-precision sensors for continuous dew point monitoring in compressed air.


  • Precise dew point measurement with ranges from –100 to +50 °C Td
  • High stability and reliability for continuous monitoring in industrial applications
  • Communication outputs: 4…20 mA, Modbus RTU, and Modbus TCP
  • Condensation point calculation to prevent moisture formation in the compressed air network
  • Robust design for industrial environments
  • Easy installation inline or in bypass
  • Available with or without display for local reading
  • Low maintenance and long sensor service life
  • Ideal for compliance with compressed air quality standards (ISO 8573)

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S230 / S231 – Dew Point Sensor for Harsh Environments

Accurate dew point measurement in potentially explosive atmospheres with ATEX and IECEx certification.


  • Dew point measurement from –100 … +20 °C Td (depending on model)
  • ATEX and IECEx certification for classified hazardous areas
  • High accuracy and stability across the entire measuring range
  • Advanced sensor technology (Polymer / Polymer + QCM)
  • 4…20 mA output + Modbus/RTU (RS-485) communication
  • Robust IP65 design for demanding industrial environments
  • Calculation of multiple humidity parameters
  • M8 connector and cable with open wire ends

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S305 Dew Point Monitor

Dew Point Monitor with Alarm (–50 … 20 °C Td / –20 … +50 °C Td)


  • Two measuring ranges available: –50 … +20 °C Td and –20 … +50 °C Td
  • Accuracy of ±2 °C Td
  • Plug & Play solution, ready to install
  • 6 mm quick connection for compressed air
  • LCD display with value and alarm indication
  • Programmable pre-alarm and main alarm (2 relays)
  • 4…20 mA output for PLC or SCADA systems
  • Industrial IP65 housing, suitable for wall or panel mounting

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S520 – Portable Dew Point Meter for Industrial Air and Gas

Portable solution for precise monitoring of dew point and pressure parameters in air and gas.


  • Complete measurement of dew point, temperature, humidity, and pressure in air and gases.
  • Internal data logging with direct analysis on the device screen, no additional software required.
  • Two sensor options depending on the application:
  • Sensor A: -100 … +20 °C Td for extreme moisture traces.
  • Sensor B: -50 … +50 °C Td for standard applications.
  • Intelligent dew point prediction for quick anticipation of results.
  • Modern color touchscreen with intuitive interface.
  • Integrated camera (optional) for audit documentation.
  • Compatible with wireless printer, USB data export, and PDF report generation according to ISO 8573-1.
  • Measuring chamber with parking function to keep the sensor dry and speed up response for each measurement.

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