Pressure vacuum gauge and vacuum gauge used to measure for steel, copper and copper alloy non-corrosive effect, there is no danger of crystallize, solidify liquid, gas or steam medium pressure or negative pressure of seismic vacuum gauge used in vibration and pressure fluctuate, measuring no corrosion, no crystallization of medium pressure. Electric contact pressure vacuum gauge and electric contact vacuum gauge copper and copper alloy non-corrosive effect, without danger of crystals solidify liquid, gas and other medium (pressure) and negative pressure. When stress to the expected value, with the contact device, can connect or disconnect control circuit, signal at the same time. Electric contact pressure vacuum gauge for measuring the copper and copper alloy non-corrosive effect, without danger of crystals solidify liquid, gas and other medium pressure and negative pressure. When the pressure and negative pressure to the expected value, using magnetic electric contact device can connect or disconnect control circuit electric contact vacuum gauge used to measure of copper and copper alloy non-corrosive liquid, gas or steam pressure. And negative pressure to the expected value of a signal, on or off control circuit. The stainless steel vacuum gauge and the stainless steel pressure vacuum gauge are used to measure the non-corrosive liquid of stainless steel 316,316l and 0Crl8Ni12MO2Ti, the pressure and negative pressure of the gas medium, the total non-rust has stronger corrosion resistance to the environment. Acid-proof vacuum gauge is used to measure the negative pressure of * and alkali liquids.