Product Name: U-shaped inclined manometer 

 Product Model: CQY-150 

 Coal safety mark No.: MFA060011 

 Description: 
 The product is a portable adjustable inclination of the micro-pressure measuring instruments apply to the gauge pressure and differential pressure measurement of gases. Used in conjunction with the pitot tube, mine ventilation network of wind speed, wind resistance, flow measurement can also be used a wind meter calibration. 

 The main characteristics and uses: 
 CQY-150 U-shaped inclined manometer (hereinafter referred to as the instrument) is a portable, adjustable tilting micro-pressure measuring instruments. The instrument is equipped with a small tripod, in the wild or underground mine, easy to use, rapid, accurate measurement, simple structure. The instrument with pitot tube with the use of coal mine ventilation network of wind speed, wind resistance, flow measurements can also be used a wind meter calibration work. 

 How it works: 
 The instrument is based on the hydrostatic principle, the use of the liquid column at both ends of the height difference between the dielectric surface due to compression of different manometric pressure measurement instruments, which is characterized by measuring the glass tube with the horizontal must tilt angle, so small can of liquid column height difference to convert a proportionately larger glass measuring tube sub-values ??express the formula as follows: 
 H = L x A 
 Where A = ρ × sinα 
 Where: 
 H: pressure value (mmH2O); 
 L: Measuring tube indexing value (mm); 
 ρ: the working medium medium density (nominal proportion 0.81g/m3) and; 
 α: angle of inclination; 
 A: tilt coefficient (the instrument 0.1,0.2,0.5,0.7 four kinds). 

 The main technical indicators: 

 Item Specification 
 Measuring range (0 ~ 150) mmH2O (1471Pa) 
 Accuracy class 1 
 The skew factor, 0.1,0.2,0.5,0.7 
 The working medium with 95% ethanol (alcohol) 
 Instrument Gross Weight 4.6kg 
 Overall dimensions of 400 × 100 × 70mm 
 Equipment tripod