WH-7900 series human body electrostatic discharge instrument (also called: touching-type static elimination ball) is made of stainless steel pipe and stainless steel ball. It is suitable for the chemical industry, metallurgy industry, military industry, oil field, computer room, high-standard hotels, high-ranking offices and other flammable and explosive places. The most prominent characteristic of the instrument is that it works normally in -50-100℃. WH-7900 human body electrostatic discharge instrument adopts a kind of passive circuit, uses static electricity on human body to make the circuit work and finally achieve the purpose of eliminating static electricity. Its features are: small and light; requiring no power supply; easy to install; insensible during electrostatic elimination.
Medical research has proved that the accumulation of static electricity on human body is harmful to health: some people may have skin allergy, heart rhythm disorders, headachy, insomnia, dysphoria and other symptoms, and some even have their hairs stand on end and mental stress. These people are afraid of touching metal objects. In addition, the static electricity accumulated on human body may cause a computer crashes, electronics components breaks down and lighting flammable materials through touching.
WH-7900A: Adopt expansion screws directly to fix the release ball on the ground.
WH-7900B: Equip with pedal baseboard, which adds stainless steel humanoid footprints on the PVC photochemical board.
WH-7900C: Equip with foundation, can be placed on the ground directly, easy to move.

Human body electrostatic voltage	±20KV	Environment temperature	22℃
Release time of five fingers	+0.09s	Residual voltage	-50V
Release time of five fingers	+0.094s	Residual voltage	-50V
Release time of palm	+0.08s	Residual voltage	-50V
Release time of palm	+0.081s	Residual voltage	-50V