Based on the same design as our standard midget impinger except that the 1 mm I.D. nozzle is replaced by a fritted glass cylinder with coarse porosity for use in tests such as ASTM D-2913 Standard Test Method for Mercaptan Content of the Atmosphere.

The impinger consists of a 25 mm O.D. flat-bottom tube with a 24/40 outer joint and graduations in 5 ml increments to 30 ml, fitted to a stopper assembly consisting of a 24/40 adapter with a connection for attaching an air pump, and a 5 mm I.D. inlet tube with a coarse porosity fritted glass cylinder at the lower end, concentric to the joint and outer tube. Overall height is 170 mm. (ASTM D-2913)