Optidew 401-501
Chilled Mirror Hygrometer
The Optidew 401-501 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 confi gurations, 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.
Highlights
- 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
Applications
Reference humidity instrument for climatic and environmental chambers – Inlet air measurement for engine testing – HVAC testing – Environmental monitoring in clean rooms – Coating process monitoring – for confectionary and pharmaceuticals – Control of humidity for metallurgical processes
Optidew
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| 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
| Sensor | Single Stage | Dual Stage | Harsh Environment |
| Dew Point Range (°C) | -30 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°C | 1.35 to 100% RH | 0.45 to 100% RH | 0.45 to 100% RH |
| Mirror Temperature Measurement | Pt1000, 1/10 DIN Class A | ||
| Corrosion & Saturation Protection | ACIS (Active Component
Isolation System) |
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| Recommended Sample Flow | Ambient (environmental
measurements) to 2Nl/min (flowing sample) |
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| Pressure | 2500 kPa max | ||
| Sensor Cable | Standard: 90°C max.
High temperature: 125°C max. |
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| Cable Length | 0.3, 3, 5, 10 and 20m
lengths available |
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| 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 1/10 DIN 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” |
| 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 |
- Overview
-
Optidew 401-501
Chilled Mirror Hygrometer
The Optidew 401-501 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 confi gurations, 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.
Highlights
- 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
Applications
Reference humidity instrument for climatic and environmental chambers – Inlet air measurement for engine testing – HVAC testing – Environmental monitoring in clean rooms – Coating process monitoring – for confectionary and pharmaceuticals – Control of humidity for metallurgical processes
- Technical Specifications
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Optidew
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
Sensor Single Stage Dual Stage Harsh Environment Dew Point Range (°C) -30 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°C 1.35 to 100% RH 0.45 to 100% RH 0.45 to 100% RH Mirror Temperature Measurement Pt1000, 1/10 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 1/10 DIN 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, PsigEnclosure 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, 30VdcInputs 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”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 - Downloads
