Product Name: Coal intrinsically safe laser pointing instrument 

 Product Model: YHJ800 type 

 Coal safety mark No.: MFK070001 

 Description: 
 This product uses a semiconductor laser as a light source, low-power design, small size, light weight, easy to use, stable performance, can be used in a mine roadway excavation point positioning, as well as roads, railways, tunnels, culverts, bridges, high-rise building, pipe installation, positioning, collimation. 

 Main features and scope of use: 
 YHJ-800 Intrinsically Safe Laser Pointer instrument (hereinafter referred to point to the instrument) using a semiconductor laser as a light source, low power consumption, good beam quality, small size, light weight, easy installation, stable and reliable performance. Supporting DJJ 3.7/127 special-purpose power supply has overcurrent, overvoltage, short circuit protection. Place without AC power or frequent movement, optional supporting YHJ-800-3.7 (A) intrinsically safe DC power of the Company. Point to the instrument can be used in the mine roadway excavation point positioning; boring machine to promote the control of the direction of the guidance; Fully Mechanized Coal Faces positioning, as well as roads, railways, tunnels, culverts, bridges, high-rise building, pipe installation, positioning, collimation . 

 How it works: 
 Point to the instrument, low-power semiconductor laser emits the laser through the optical system convergence, making it a highly collimated laser beam through the horizontal and vertical fine-tuning, the completion point. 

 The main technical indicators: 

 Item Specification 
 Effective range of> 800m 
 Output power ≥ 5mW 
 Light colors red, green optional 
 Spot diameter ≤ 70mm (in the 800m at) 
 Working current ≤ 60 mA 
 Laser beam horizontal / vertical adjustment range of ≥ ± 2.5 
 Explosion-proof type Exib I 
 Degree of protection IP54 
 Dimension Φ46 × 230 × 110mm 
 Weight 1.60kg 
 The equipment DJJ3.7/127 explosion-proof AC power 
 YHJ-3.7-type intrinsically safe DC power