This coulomb meter uses a plastic housing and is otherwise identical in performance to the earlier model that used a metal housing.  

Made in Australia by IEC, this meter is a useful tool and behaves similar to a "digital electroscope".

The display will show the number of coulombs deposited into the instrument either by current through a resistance or from a capacitor or from a source of static electricity .... for example,  a charged plastic rod.

An Electroscope will deflect its vane,  but this instrument displays the charge digitally in coulombs up to 1.999 nano coulombs.

Size: 122 x 102 x 40mm.