Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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Product Manual
The New Laboratory Humidity Reference Standard
Features
Accuracy of ±0.1 °C (±0.18 °F)
Precision measurement to -100 °C (-148 °F) frost point (13.8 ppbV) with no need for additional cooling
Reproducibility of ±0.15 °C (±0.27 °Ffp) at -100 °C (-148 °Ffp) frost point
Simple configuration and operation via touch screen interface
Sensor optimized for fast response to low moisture levels
External 4-wire Pt100 connections
Microscope for visual inspection of condensate on mirror
Compact 19” x 4U package for flexibility of installation
Ethernet or USB connections
SD card data logging
The S8000 -100 hygrometer directly measures the formation of condensation on a mirrored surface, offering the widest possible measurement range of -100...+20 °C frost/dew point. It uses a unique advanced dual optics system which detects small changes in moisture condensed on the mirror surface. This results in a very high sensitivity and fast response to changes in frost point, even at very low moisture levels where measurements are most challenging. Fully automated control of the system means that no operator intervention is required. The instrument provides a range of Modbus digital communications, and analog outputs allowing it to be monitored remotely or via specific S8000 -100 logging software. 4-wire Pt100 connections are provided on the rear panel for remote mirror temperature monitoring. A high-contrast touch-screen LCD display gives or presents entirely customizable local indication of the measured values, along with a trend graph and fault warnings.
Specifications
| Dew-Point Sensor | |
| Measurement Range | -100...+20 °C (-148...+68 °F) frost/dew point |
| Measurement Accuracy* | ±0.1 °C (±0.18 °F) |
| Reproducibility at -100 °Cfp | ±0.15 °C (±0.27 °F) |
| Stability at -100 °Cfp | ±0.1 °C (±0.09 °F) |
| Speed of Response |
<2hrs to ±0.25 °C (±0.45 °F) stability @-90 °Cfp (-130 °Ffp) <6hrs to ±0.25 °C (±0.45 °F) stability @-100 °Cfp (-148 °Ffp) |
| Temperature dependence at -100 °C (-148 °F) | ±0.15 °Cfp (±0.27 °Ffp) per 1 °C (1.8 °F) environmental temperature change |
| Mirror | Gold-plated copper |
| Temperature Measurement | 4-wire Pt100, 1/10 DIN class B |
| Sample Flow Rate | 500...1000 ml/min (recommended 750 ml/min) |
| Sample Gas Pressure | 1.6 bara (23.2 psia) max |
| Pressure Sensor | |
| Measurement range | 0...1.6 bara (23.2 psia) |
| Measurement Accuracy |
Accuracy 0.25% FS Typical Thermal error 1.5% FS Typical Drift 0.2% FS/p.a non-cumulative Temp Comp -20 °C...+80 °C (-4 °F...+176 °F) |
| Flow Sensor | |
| Measurement Range | 0 to 1000ml/min |
| Measurement Accuracy | ±1.5% FS (10...100% of rated flow) |
| Monitor | |
| Resolution | User selectable to 0.001 °C (0.0018 °F), depending on parameter |
| Measurement Units | °C dew/frost point, °C temperature, ml/min flow, bara pressure |
| Calculated units | Relative humidity – %, Absolute humidity – g/m3, ppmV, Mixing Ratio – g/kg, Wet Bulb Temperature (Twb) – °C, °F, Water Vapor Pressure (wvp) – Pa, Pressure converted DP – °C, °F, Pressure – kPa, Barg, Psia, Psig |
| Outputs |
Analog: 2x active mA outputs, configurable 0...20 mA or 4...20 mA Digital: Modbus RTU over USB Optional: Modbus RTU over RS485/RS232, Modbus TCP over Ethernet Alarm: 1x Process Relay 1x Alarm Relay Both Form C, 1 A, 30 V DC |
| User Interface | 5.7" LCD with touchscreen |
| Data Logging |
SD Card (8GB supplied) and USB interface. Supports SD Card (FAT-32) – 32 GB max. that allows 24 million logs or 560 days, logging at 2-second intervals |
| Environmental Conditions | +5 °C...+30 °C (+41 °F...+86 °F) |
| Power Supply | 85 to 264 V AC |
| Power Consumption | 185 VA |
| Mechanical Specification | |
| Dimensions (W x H x D) | 440 mm x 185 mm x 515 mm (17.32” x 7.28” x 20.28”) |
| Weight | 22 kg (48.5 lb) |
| Sample Gas Connections |
Inlet: ?" VCR Outlet: ?" Swagelok |
| General | |
| Optional Remote Temperature Probe | 4-wire Pt100, 1/10 DIN class B, 2m cable |
| Calibration | 5-point UKAS calibration to -90 °Cfp (-130 °Ffp) + -100 °Cfp (-148 °Ffp) |
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* Measurement accuracy means maximum deviation between instrument under test and corrected reference. To this must be added the uncertainties associated with the calibration system and the environmental conditions during testing or subsequent use. |
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