Zhengzhou Huazhi Technology Co., Ltd. is a domestic testing equipment manufacturer. It is a modern comprehensive high-tech entity integrating R & D, design, production and sales. For many years, it has been serving electric power, metallurgy, petrochemical, coal and scientific research institutions. Relying on its strong technical foundation and strict production process control and production management system, Zhengzhou Huazhi Technology Co., Ltd. has successfully launched coal drilling cuttings gas desorption instrument, coal seam gas content rapid measuring instrument, gas pressure measuring instrument, gas outburst parameter instrument Geological exploration gas desorption instrument, coal methane adsorption constant tester, gas emission initial velocity tester, borehole gas flowmeter, coal firmness coefficient tester, portable gas drainage multi parameter tester, orifice multi-stage flowmeter, hole sealer, U-shaped inclined differential pressure meter, residual gas content measuring device, gas emission velocity tester, gas pipeline multi parameter tester Borehole gas emission initial velocity tester, methane sensor calibrator, pitot tube, empty box barometer, electronic air meter, mechanical air meter, gas stick, gas alarm sensor comprehensive calibration platform, pressure sensor comprehensive calibration platform, methane adsorption constant tester, gas emission initial velocity tester, true density meter, full-automatic industrial analyzer, Comprehensive calibration table of temperature sensor of rapid gas content tester, calibration table of optical interference methane tester, outburst hazard predictor, compensated micro pressure meter, positive pressure oxygen respirator, coal sample cylinder, coal sample tank, gas tank, dust tester, dust sampler, high negative pressure sampler, U-shaped differential pressure meter, ball mill, coal spontaneous combustion tendency tester, explosion tester Well known products such as four-way valve gas flow differential pressure gauge, fast hole sealer and pneumatic diamond chain saw have been sold all over the country and have been widely praised and favored by users.