A single PUMPWATCH test measure with nominal capacity 10L or 20L (each with ID 300mm) is suspended from a light-weight 2-wheel transport trolley in such a manner that the combined centre of gravity of the test measure full of fuel and the transport trolley, is balanced over the wheel axis, when the transport trolley is lifted to it’s “travelling position” thus greatly reducing the effort required to move the the test measure full of fuel around the service station to the fuel return area.
Lesser capacity test measures (2L and 5L with ID typically 150mm) are typically not transported alone on a transport trolley. Instead they may be suspended alongside a 10L or 20L test measure in “tandem measure pack” format by means of a “tandem H-frame” where a lesser diameter (2L or 5L) test measure is suspended alongside a greater diameter (10L or 20L) test measure.