Product Name: Hair Dryers Air flow switch sensor 

 Product Model: GFT15 type 

 Coal safety sign: MFB090077 

 Description: 
 The product is mainly used for the detection of underground coal mine ventilation Bureau fan within the air flow to achieve the monitoring of the air volume within the hairdryer. 

 Product characteristics and uses: 
 GY15-type the hairdryer pressure sensor (hereinafter referred to as sensors), mainly used for the detection of underground coal mine ventilation Bureau fan within the air flow, to achieve the monitoring of the air volume within the hairdryer. 
 Fixed-mounted sensors for downhole instrument, and its explosion-proof type of ore with Intrinsically Safe, Explosion-proof mark: ExibI. 

 How it works: 
 The sensor consists of the following units: Handle group, the reed switch group, the permanent magnet group. Permanent magnet fixed on silica gel plate in the fan barrel wind and greater than 6m / s (before leaving the factory it is set), the pressure of the wind through the air inlet role in the silicone rubber panel (permanent magnet fixed on the plastic sheet) plastic sheet raised, close to the reed switch, reed switch position static, the reed switch to pull, always open to change normally closed at this time hairdryer over 6m / s wind speed, the measurement is completed. 

 The main technical indicators: 

 Item Specification 
 Measuring range (4 ~ 15) m / s 
 Measurement error of ± 2% 
 Output signal switching 
 Contact capacity of the DC 36V/100mA 
 Transmission distance ≥ 2km 
 Dimensions φ80 × 130mm 
 Weight 0.45kg