985 Dew Point Mirror

The 985 Dew Point Mirror is a portable instrument equipped with an integral measuring head for both spot and continuous measurement of frost/dew point and temperature in air and gas. Based on the chilled mirror principle, the 985 provides fundamental, drift free and precise humidity measurement.The 985 has no need for either humidity sensor replacement or calibration adjustment. Unlike sensor-based systems, routine maintenance is conveniently limited to occasional mirror cleaning. Users can self-check instrument calibration stability using the integrated Ice-Test function.

Key Features

  • Fundamental drift free humidity measurement
  • Integral frost/dew point measuring head
  • Optimal Response Injection System for fast measurement Pressures up to 10 bar
  • Intuitive, easy to use LCD touch screen user interface

Specification

Measuring Ranges
Frost/Dew Point
  Working range: -60 °C~+20 °C
  Calibrated range: -50 °C~+20 °C 
Mixing ratio: 100~20,000 ppmv 
Sample Pressure: 0~10 bar

Accuracy
Frost/Dew Point (over calibrated range): ≤ ± 0.1 °C
Pressure: ≤ ± 0.1% range

Reproducibility
Frost/Dew point: ≤ ± 0.05 °C

Standard Features
Digital I/O: RS-232
Display: 5.7” LCD with touch screen
Mirror temperature sensor: PRT (Pt-100) 
Mirror cooling: 3-stage Peltier thermoelectric
Internal gas tubes: Stainless Steel 316L (inlet and outlet) FEP outlet with sample pump 
Sample gas flow rate: 0.1~1L/min 
Gas inlet connections: 6 mm or 1⁄4” Swagelok fittings 
Internal Sample Pump: Optional
ORIS: Optimum Response Injection System
Transport case: Robust custom fit, foam lined, hard-shell case 
Power cable: 2.5 m 
Operating instructions: English 
Calibration certificate: Factory calibration: 5 points FP/DP

Additional Information
Supply voltage: 100-120 VAC / 200-240 VAC, 50/60 Hz (auto switching)
Power consumption: 200 Watt 
Cooling: Air, additional water cooling optional.
Operational conditions: 10°C~+40°C, Maximum98%rh, non-condensing 
Storage temperature: -20 °C~+50 °C 
Dimensions (W x H x D): 420x155x390mm
Weight: 10kg
 

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