1Set Portable Manometer ABS Manometer Digital Handheld Air Vacuum Gas Pressure Gauge Meter ,Easy to Use

Air conditioning refrigeration industry used to measure pressure difference. Measuring negative pressure setting to ensure indoor air pests will pollute the air in the outside world. Maximum / Minimum / Average Read Write Function. Reset, offset and data offset. Set the low battery display and auto power off function.You may also like Digital Manifold Gauge Digital Differential High Accurate Reading Pressure Gauge Fits For Automotive Cars And Motorcycles ,Portable.