Dew Star R-1
Chilled Mirror Dew Point Hygrometers with separate probe

With its feature as standard of humidity measurement and humidity management of industrial applications, Dew Star series has been adopted in worldwide for wide range of applications over the decade since its release. Our new Dew Star R-1 series, probe separate type has achieved wider applications of dew point measurement with its original accuracy and reliability. Dew Star R-1 series enables dew point measurement in smaller space, various testing chambers and more applications.

  • Wide field of applications with monitor and probe separate type dew point hygrometer
  • Auto mirror cleaning function (ACCU-STAR)
  • Corrosive gas measurement available *Sulfur Oxides (SOx), Nitrogen Oxides (NOx), Bromine (Br), Chlorine (Cl)
  • Psychrometric calculation function (Relative humidity, Absolute humidity, Moisture percentage etc.)
  • Monitor and probe can be installed in separate room with connecting cable
  • Monitor type –desktop or rack-mounted
  • Probe can be installed outside the monitor room using the mounting bracket
DewStar R-1Zoom In

  • Specfication
  • Application
  • Option
Model Dew Star R-1
Operating range

-10 to 60℃ (sensor probe) 0 to 35℃(monitor)

Measurement range of dew point (at 23℃) -40 to 23℃
Operating pressure range -0 to 0.5MPaG
Sampling flow rate 0.1 to 2.5L/min
Reproducibility ±0.05(at 25℃)
System accuracy ±0.2℃ DP
Analog output (at monitor) 4 to 20mA, 0 to 5VDC
Alarm output (at monitor) PhotoMOS relay
Digital output (at monitor) RS232C (Measurement or Calculation value)
Sensor probe fan On/Off switch
Weight 2.0kg (sensor probe)/ 3.2kg (monitor)
Supply voltage AC90 to 265V(50/60Hz)
Power consumption 50W
Monitor Rack-mounted type
Monitor Desktop type
Sensor Probe

Sensor probe integrated in the test chamber –offers monitoring the lab from outside

Sensor probe of Dew Star R-1 Chilled Mirror System enables users to monitor the inside atmosphere with the monitor settled at the monitor room. The monitor of the system can be chosen from desktop type or rack-mounted type.

Monitoring dew point of torque meter in automobile applications

Dew Star R-1 sensor probe can be installed directly inside the chamber in measuring the dew point.

Best solution for the calibration standard of humidity in chamber with its long-term stability

Dew Star R-1 series can work as the calibration standard with its long-term reliability and repeatability which is traceable to national standards.

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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