Overview

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.

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

Key Specifications

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
 

Applications

• Measure humidity of SF6 gas in the electrical equipments
• On-site calibration of dew point sensors
• Checking breathing gas quality
• Battery manufacturing
• Standards laboratories
• Compressed air systems
• Validation of production and storage conditions 
• Dryer performance tests