It is a complex unit that consists of illumination, gas, water and aspirator and that enables poisonous gas experiments. The body and the filter are made of DKP sheet iron and electrostatic epoxy powder painted. It is disassembled. The broken parts may be replaced. The workbench is stainless steel or trespa toplap. The front window is height adjustable, transparent acrylic and may stay in the suitable position. Grounded power sockets, cabin illumination, safety gas key, gas and water valves are found in the front panel. There is a special gasket in the gas valve, which is not affected from gas. The instrument cabinet below is wheeled and consists of a ventilation pipe for chemicals. A standard spiral style fan motor is utilized in the unit, but for extensive chemical uses a polypropilene fan motor that has a high resistance to chemicals may be preferred.