Chilled mirror hygrometry is a precise technique for determining the water vapor content is gases by directly measuring dew point or frost temperatures. Using this technique a metal mirror is cooled until it reaches a temperature at which a thin layer of condensation begins to form on it. The dew layer is detected optically, and the mirror is held at that temperature. The mirror temperature, measures with a PRT, is an accurate indicator of the dew or frost point.

 

FEATURES

• Dew point measure range -40℃ to +90℃
• Accuracy of dew point is   ±0.15 ℃
• Dynamic balance control for contamination
• Simultaneously measures dew point, temperature, relative humidity, absolute humidity, specific humidity, enthalpy, vapor pressure and volume ratio (ppmV).
• Real time data logging and display curve
• MAX value and MIN value are recorded
• AC or alternative DC power supply
• MODBUS RTU and USB communication
• 4 Inch touch screen
• External temperature sensor port
• Force frost function at low dew points

APPLICATION

• Reference standard in calibration lab
• Inlet air measurement for engine testing
• Heating ventilation and air conditioning test
• Environment monitoring in clean room
• Humidity control for metallurgical processes
• Coating process monitoring in pharmacy
• Reference humidity instruments for climatic and environmental chambers

SPECIFICATION

• DP/FP ranges: -40℃ to +90℃, (0.55%~100%RH @20℃)

  DP/FP accuracy: ±0.15℃ (calibration: -15℃ to +20℃)

  DP/FP resolution: 0.01℃

  DP/FP reproducibility error: ±0.05℃

• Temperature range: -45℃ to +100℃

  Temperature accuracy: ±0.05℃ (calibration: -10℃~60℃)

  Temperature resolution: 0.01℃

  Temperature reproducibility error: ±0.05℃

• Working environment: -20℃ to +60℃, 10%RH to 90%RH, 101.325kPa (custom atm. is option)
• Mirror temperature measurement: 4 wire PT100 1/3B
• Probe material: SUS304 stainless steel
• Cable material: Polyurethane material with shielding layer
• Response time: Max cooling 0.8℃/s, + 15s balance time
• Sampling airflow rate: 0.1~1NL/min (The volume of ventilation is inversely proportional to the dew point)
• Cooling type: Peltier cooling
• Output signal: Modbus RTU, USB
• Power supply: 100-240V AC 35W or USB Type-C 5V/2A 10W
• Ingress protection grade: IP54
• Dimension: 160mm (W) x 165mm (D) x 85mm (H)
• Weight: 4kg inlcudes standard accessories

 

SCOPE OF DELIVERY

• BL783 Precision chilled mirror hygrometer
• Two Stage Chilled Mirror Dew Point Sensor
• Temperature sensor
• 2 meters dew point sensor connection cable
• 2 meters temperature sensor connection cable
• USB2.0 into USB type-C cable
• Standard AC Power cord
• User manual
• Factory calibration report
• Carrying case

OPTIONAL ACCESSORIES AND SERVICES

• ISO17025 accredited calibration certificate

HOW TO ORDER

• BL783-220V
• BL783-110V