Dew Star S-2
Chilled Mirror Optical Dew Point Hygrometer

The Dew Star S-2 Chilled Mirror System is a high performance Chilled Mirror Sensor with Peltier Thermoelectric mirror cooling to measure low frost points. It provides accurate and reliable dew point measurement over an extended range for long periods of time with the new ACCU-STAR mirror maintenance feature.

  • Accurate and reliable dew point measurement.
  • ACCU-STAR mirror maintenance feature.
  • Remote multifunction display monitor.
  • Simultaneously measure dew point, temperature, and pressure.
  • Repeatability to ± 0.05 °C.
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Model Dew Star S-2
Range of System Requirements 0 to 35°C(Sensor) 0 to 35°C(Monitor) 95%rh or less(no dewfall)
Dew Point Range -65 to 15°C (Air cooling at 23°C)
-75 to 15°C (Water-cooling at 20°C.
-65°C or less is Water-cooling 10°C.)
Working Pressure 0.5MPaG
Repeatability ±0.1°C DP
Sampling Flowing Quantity 0.5 to 2.5L/min
Accuracy D±0.2°C DP ( > -50°C DP )、±0.4°C DP ( ≦ -50°C DP)
Measurement Parameter Dew/Frost point (°C),Temperature(°C),Pressure(kPa)
Operation Value Relative Humidity(%rh),Absolute Humidity(g/m3), Moisture Regain(PPMv) (PPMw)
Analog Output(Monitor) 4 to 20mA 0 to 5V
Alerm Output(Sensor) Photo MOS relay
Digital Output RS232C
Sensor to Monitor Special Cable (Length 3m)
Connection 1/4" Compression Fitting PT
Power Supply AC90 to 240V 50/60Hz
Weight Approx 0.5kg(Monitor)
Approx 10kg
Consumed Power Approx 200W

Temperature sensor S-1S-001

Sensor Pt100Ω 4-wire type
Measurement range -50 to 100℃
Accuracy ±0.2℃(0℃)
Dimension φ3.2 × L250mm
Cable length 3m


Air pressure sensor

Input voltage DC9 to 30V
Accuracy ±0.15%FS
Output voltage 4 to 20mA
Pressure range 0 to 210kPa
Cable length 3m
Dimension/ weight φ30 × 87mm / 200g


Air pump unit AU-3

Pumping sampling gas into Dew Star on measurement.Flow meter integrated.


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