JFY-4 Ventilation Multi-Parameter Measuring Instrument Product Introduction
The JFY-4 Ventilation Multi-Parameter Measuring Instrument is a precision handheld portable device capable of simultaneously measuring atmospheric pressure, differential pressure, wind speed, temperature, and humidity. It is primarily used for determining atmospheric pressure, differential pressure, wind speed, temperature, and humidity, and is suitable for firefighting, confined spaces, municipal works, chemical industry, and gas applications.
JFY-4 Ventilation Multi-Parameter Measuring Instrument Technical Parameters
Temperature: (0～40)℃, ±1.0℃
Humidity: 0～95%RH, ± 3%RH
Differential Pressure: -3500Pa～+3500 Pa, ± 2%
Pressure: 95kPa～120kPa, ± 2%
Wind Speed: 0.2～5 m/s, 0.2m/s
5～10 m/s, 0.3m/s
>10 m/s, 0.4m/s
Display Method: LCD Display Working Voltage: 6V, Working Current: <130mA
Operating Time: ≥10h
Inlet Wind Speed Probe Data Storage Capacity: 26500 data points and 100 data groups Explosion-Proof Type: Intrinsic Safety, Explosion-Proof Mark: ExibI Open Circuit Voltage: 7V Short Circuit Current I0: 3A
Battery Model and Capacity: Nanfu AAA Ni-MH Rechargeable Battery, 900mAh per cell
Dimensions: 9.7 cm *21.1 cm*5.3 cm
Weight: 0.36kg 

Zhengzhou Aidi produces and supplies coal drill cuttings desorption instruments, deep-hole sampling devices, pressure measuring instruments, geological exploration desorption instruments, borehole flowmeters, mine gas extraction and outburst prevention equipment, true density measuring instruments for coal, gas content measuring instruments, automatic initial gas emission speed measuring instruments, diffusion speed measuring instruments, gas parameter instruments for coal extraction pipelines, and borehole coal powder circulation devices  Mine-intrinsically safe coal seam gas pressure measuring instruments, gas content measuring instruments in coal, gas outburst parameter instruments, coal drill cuttings gas desorption instruments, underground gas desorption instruments, coal sample cans/coal sample cylinders, geological exploration gas desorption instruments, multi-stage borehole flowmeters,

Mine hole sealing devices, high-negative-pressure gas samplers, methane sensor calibration instruments, automatic negative-pressure samplers, positive-pressure samplers/multi-gas samplers, self-rescuer airtightness testers (pointer type/digital display type/touch screen type), integrated underground gas content measuring instruments, gas content measuring instruments in coal
Optical interference methane measuring device (intelligent type), optical interference methane calibrator (water column type), electric constant temperature drying ovens