The Optidew is a fast-responding chilled mirror hygrometer, equally at home in both industrial humidity control and precision laboratory applications. It is available in bench top and wall mount configurations, and features an intuitive touch screen interface for easy local operation. Using the latest developments in chilled mirror technology, it has a response speed comparable to polymer relative humidity sensors, combined with the reliability of drift-free measurements common to all chilled mirror instruments..

Product Features

  • New chilled mirror hybrid sensor gives fast dynamic response to changes in humidity
  • Accurate to ±0.15°C dew point, ±0.1°C temperature
  • Wide measurement range from -40 to +120°C dew point
  • Choice of communication methods, including Modbus TCP over Ethernet communication for easy networking
  • Optional pressure transmitter for accurate calculation of ppmv & g/kg


Technical Specification


Performance
Dew Point Measurement Accuracy ±0.15°C
Reproducibility ±0.05°C
Sensitivity ±0.01°C
Response Stable measurement at +10°C dp within 1 minute
Dew-Point Sensor
SensorSingle StageDual StageHarsh Environment
Dew-Point Range(°C)-25 to +90°C-40 to +90°C-40 to 120°C
Temperature Range(°C)-40 to +90°C-40 to +90°C-40 to +120°C
%RH Range @ 23°C2.25 to 100% RH0.45 to 100% RH0.45 to 100% RH
Mirror Temperature Measurement Pt1000,DIN Class A
Corrosion & Saturation Protection ACIS (Active Component Isolation System)
Recommended Sample Flow Ambient (environmental measurements) to 2Nl/min (flowing sample)
Pressure 2500 kPa max
Sensor Cable Standard: 90°C max. High temperature: 125°C max.
Cable Length 0.3, 3, 5, 10 and 20m lengths available
Process Connection M36x1.5
Remote PRT
Temperature Measurement Accuracy ±0.1°C
Cable Length 0.3, 3, 5, 10 and 20m lengths available
Temperature Measurement PT100, Class A
Remote Pressure Sensor (Optional)
Pressure Measurement Accuracy ±0.25% FS
Pressure Measurement Range 0-160 kPa OR 0-2500 kPa
Process Connection 1/8” NPT-M
Output 4-20mA
Control Unit
Resolution 1 or 2 decimal places selectable
Measurement Units °Cdp or °Fdp, Relative humidity - %, Absolute humidity - g/m3, ppmV, Mixing Ratio - g/kg, Wet Bulb Temperature (Twb) - °C, °F, Water Vapor Pressure (wvp) - Pa, Ambient Temperature - °C, °F, Pressure converted DP - °C, °F, Pressure - kPa, Bara, Barg, Psia, Psig
Enclosure Wall Mount - Optidew 501 Bench Top - Optidew 401
Material ABS ABS
Analog Outputs Two 0/4-20mA outputs (maximum load 500Ω) Two 0/4-20mA outputs (maximum load 500Ω)
Digital Communications Modbus RTU over RS485 (standard)
Modbus TCP over Ethernet (optional)"
Modbus RTU over:
USB (standard)
RS485 (standard)
Modbus TCP over Ethernet (optional)"
Alarms 1x Process Relay,
1x Alarm Relay,
Both Form C, 1A, 30Vdc.
1x Process Relay,
1x Alarm Relay,
Both Form C, 1A, 30Vdc"
Inputs 4-20mA for pressure sensor 4-20mA for pressure sensor
Data Logging SD card slot (optional) SD card slot (standard)
Ingress Protection IP54 (standard), IP65 (optional) IP54
Dimensions 220x175x75mm 220x175x118mm
Weight Control unit: 1.5kg, Sensor: 200g Control unit: 1.5kg, Sensor: 200g
Display 5.7” colour touch screen (optional) 5.7” colour touch screen
Environmental Conditions -20 to +50°C, up to 100%RH non-condensing (optional) 100% RH condensing with IP65 connector version
Supply Voltage 100 to 240VAC, 50 to 60Hz
Power Consumption 30VA max



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