Michell Instruments

S8000 Chilled Mirror Hygrometer

High-precision hygrometer combines straightforward operation w/ very high sensitivity to changes in moisture content

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S8000 Chilled Mirror Hygrometer 05666
S8000mk2 2
S8000mk2 3 1
The S8000 precision hygrometer provides a direct measurement of dew point, temperature and pressure. Suitable for both industrial and laboratory applications, the instrument is compact and self-contained.
 
Dew-point measurement is based on the proven, fundamental optical chilled mirror measurement principle, giving long-term reliable humidity measurement over the entire operating range. The S8000 uses this measurement to offer a range of available measurement units including ppmV, absolute humidity, relative humidity and ppmW.

• ±0.1°Cdp (±0.18°Fdp) accuracy
• Fundamental, accurate and drift-free measurement
• Simple configuration and operation via touch screen interface
• Precision measurements to –60°C (–76°F) dew point
• FAST – guaranteed frost formation below 0°C (+32°C)
• Measure at pressures up to 2 MPa (20 barg)
• USB, Ethernet, RS485 or RS232 connectivity
• Datalogging to SD card or via digital comms

Operating PressureLow pressure version: 0 to 1 barg / 14.5 psig
High pressure version: 0 to 20 barg / 290 psig
Sample Flow Rate0.1 to l Nl/min (0.2 to 2.1 scfh)
Dew-Point Sensor Performance
Measurement TechnologyChilled Mirror
Accuracy±0.1°Cdp
Reproducibility±0.05°C
Measurement Range–60 to +40°Cdp (–76 to +104°Fdp)
Integrated Pressure Sensor (Optional)
Measurement Range0 to 25 bara (0 to 377 psia)
Measurement Accuracy0.25% Full Scale
Measurement Unitspsia, bara, KPa or MPag
Monitors
ResolutionUser-selectable to 0.001 dependant on parameter
Measurement Units°C and °F for dew point and temperature %RH, g/m3, g/kg, ppmV , ppmW (SF6), for calculated humidities
OutputsAnalog 3 channels, user selectable 4-20 mA, 0-20 mA or 0-1 V
Digital Modbus RTU over USB, and optional Modbus RTU over RS232, RS485 or Modbus TCP over Ethernet
Alarm Two volt-free changeover contacts, one process alarm, one fault alarm; 1 A @ 30 V DC
HMI5.7” LCD with touchscreen, white on blue graphics
Data Logging SD Card (512Mb supplied) and USB interface
SD Card (FAT-16) — 2Gb max. that allows 24 million logs or 560 days, logging at 2 second intervals
Environmental Conditions–20 to +40°C (–4 to +104°F)
Power Supply85 to 264 V AC, 47/63 Hz
Power Consumption100 V A
EMC - Class A Emissions Industrial Location ImmunityComplies with EN61236:1997 (+A1/A2/A3)
Mechanical Specifications
Dimensions187 x 440 x 343mm (7.36 x 17.32 x 13.5”) h x w x d
Weight11.4kg (25.1lb)
General
Process Connections6mm Swagelok® (MALE)
tube or 1/4” Swagelok® tube (MALE)
Detection SystemRRS Triple Detection
Remote PRT Probe (Optional)
Temperature Measurement4 wire Pt100, 1/10 DIN class B
Measurement Accuracy±0.1°C
Cable Length2m (6.6') (250m (820') max)
Flow Sensor
Measurement AccuracyTypical ±5% uncalibrated
Measurement Range0 to 1000 ml/min
Storage Temperature–20 to +50°C (–40 to +122°F)
Calibration3-point traceable in-house calibration as standard
UKAS accredited calibrations optional - please consult Michell

 • Standards laboratory reference instrument

• Transformer vacuum drying verification
• Clean/dry room environmental monitoring
• Metallurgical process monitoring
• Reference instrument for commercial calibration laboratory
• Compressed air dryer R&D
• SF6 switchgear moisture testing
• Hydrogen fuel cell R&D

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