Wide Dew Point Measuring Range
Measures dew point from −80 to +20 °Ctd (depending on version), suitable for refrigeration, membrane, and desiccant dryers.
CS Instruments – FA 500
High-precision dew point sensor for reliable monitoring of dry compressed air in industrial systems.
| Measuring Range: −80 … +20 °Ctd (depending on version) |
| Accuracy: up to ±1 °Ctd |
| Output: 4–20 mA, Modbus RTU |
| Alarm: Integrated relay, adjustable threshold |
| Protection: IP65, up to 500 bar (special version) |
| Measuring Range: −80 … +20 °Ctd (depending on version) |
| Accuracy: up to ±1 °Ctd |
| Output: 4–20 mA, Modbus RTU |
| Alarm: Integrated relay, adjustable threshold |
| Protection: IP65, up to 500 bar (special version) |
- Dew Point Measuring Range (Version Selection)Versions for different dryer types: −20 … +50 °Ctd (refrigeration dryers), −60 … +30 °Ctd or −80 … +20 °Ctd (desiccant dryers).
- Integrated Display and KeypadBuilt-in display with large dew point and humidity parameter indication, combined with simple menu-based operation.
- Analog and Digital Outputs4–20 mA analog output for dew point measurement and Modbus RTU (RS-485) communication for integration into monitoring and energy management systems.
- Alarm RelayIntegrated relay with adjustable threshold and hysteresis (NC, up to 60 VDC / 0.5 A) for reliable alarm functionality.
- Industrial DesignIP65 housing, operating temperature −20 … +50 °C, and standard pressure resistance up to 50 bar.
| Parameter | FA 500 |
|---|---|
| Measuring Range | −80 … +20 °Ctd, −60 … +30 °Ctd, −20 … +50 °Ctd or 0 … 100 % RH |
| Accuracy (+50 … −20 °Ctd) [°C] | ± 1 |
| Accuracy (−20 … −50 °Ctd) [°C] | ± 2 |
| Accuracy (−50 … −80 °Ctd) [°C] | ± 3 |
| Pressure Range [bar] | −1 … 50 (special version up to 500) |
| Power Supply [VDC] | 24 (10 … 36) |
| Protection Class | IP65 |
| EMC | According to DIN EN 61326-1 |
| Operating Temperature [°C] | −20 … +50 |
| Connections | 2 × M12, 5-pin (analog output, Modbus RTU and alarm output); optional M-Bus; optional Ethernet (PoE) |
| Outputs | 4–20 mA (3-wire) for dew point; alarm relay (NC, max. 60 V DC, 0.5 A) |
| Analog Output Load [Ω] | < 500 |
| Communication | Modbus RTU (RS-485); optional Ethernet (PoE); optional M-Bus |
| PC Connection | Modbus RTU (RS-485) |
| Process Connection | Stainless steel 1.4404: G 1/2"; optional 5/8" UNF; NPT 1/2" |
| Housing Dimensions (W × H × D) [mm] | 76.5 × 85 × 75 |
Why Choose the FA 500?
Integrated Display and Easy Operation
The built-in display with large digits provides direct dew point and humidity parameter readings, while menu-based navigation ensures simple operation.
Integrated Alarm Relay
Configurable alarm threshold via keypad with relay output (up to 60 VDC, 0.5 A) for reliable warning when limits are exceeded.
Stable and Fast Measurements
Outstanding long-term sensor stability and short response times ensure reliable monitoring of dry compressed air conditions.
Analog and Digital Outputs
Standard 4–20 mA analog output for dew point measurement and Modbus RTU communication allow easy integration into monitoring and SCADA systems.
Advanced Communication Options
Optional Ethernet interface (including PoE) and additional communication options provide modern networking and remote monitoring capabilities.
Optional Pressure Measurement
Available with an integrated pressure sensor (up to 30 bar or up to 2000 bar abs.) for advanced calculations and increased accuracy.
Suitable for High-Pressure Applications
Pressure-resistant housing up to 50 bar as standard, with special versions available for operation up to 350 or even 500 bar.
General Industry
Compressed AirContinuous dew point monitoring ensures stable dryer operation and prevents condensation within the compressed air network.
Plastics / PET
Air QualityMonitoring compressed air dryness for reliable pneumatic operation and stable production processes in plastics and PET manufacturing.
Food Industry
Process SafetyDew point monitoring helps reduce moisture-related risks and supports quality requirements in food production.
Pharmaceutical Industry
Validation / MonitoringAccurate dew point monitoring ensures dry, repeatable conditions and improved traceability in critical manufacturing environments.
Medical Industry
System ReliabilityMonitoring compressed air dryness ensures stable system performance wherever air quality is of critical importance.
Energy Industry
OperationsDew point monitoring prevents moisture in instrument air systems and increases the reliability of critical equipment.
Measuring devices
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Where to find us
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Dew Point Meters
Choose the right dew point sensor or meter for monitoring residual moisture in compressed air and technical gases. The portfolio includes fixed-installation probes, ATEX versions, and portable service instruments.
FA 510 / FA 515
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FA 550
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FA 515 Ex
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FA 505
OEMNew-generation dew point sensor for measuring residual moisture in compressed air and gases.
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DP 500
Portable MeterPortable dew point meter with integrated data logger for precise service measurements of dryers down to −80 °Ctd.
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DP 510
Additional InputAll DP 500 functions with an additional free sensor input.
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DP 400 mobile
Portable Case VersionPortable dew point meter with integrated rechargeable battery, high-precision dew point sensor, and pressure sensor up to 16 bar for comprehensive monitoring of moisture and pressure in compressed air systems.
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