Model BL783 Precision Chilled Mirror Hygrometer

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 dew or frost point.

FEATURES

• Dew point measure range -40℃to +90℃
• Accuracy to ±0.15 ℃ dew point
• 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
• Improved frost assurance 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 ranges: -40℃to +90℃, (0.55%~100%RH @20℃)
• DP accuracy: ±0.15℃(calibration: -15℃to +20℃)
• DP resolution: 0.01℃
• DP 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:100-24VAC 35W or USB Type-C 5V/2A 10W
• Ingress protection grade:IP54
• Dimension: 160mm (W) x 165mm (D) x 85mm (H)
• Weight: 1.2kg approx.

SCOPE OF DELIVERY

• BL783 Precision chilled mirror hygrometer
• Dew point sensor (P/N:6830)
• Temperature sensor
• 2 meters dew point sensor connection cable
• 2 meters temperature sensor connection cable
• USB type-C communication cable
• Standard AC Power cord
• User manual
• Factory calibration report
• Carrying case

OPTIONAL ACCESSORIES AND SERVICES

• ISO17025 accredited calibration certificate (P/N:9000-783)
• 5V/2A UNIVERSAL USB CHARGER (P/N:5V-CHRG)

HOW TO ORDER

• Model BL783