For fast evaluation of the initial setting of concrete. It can be used on light weight concrete, special roof deck mixes and concrete additives.
Consists of a needle having face area 3/10 sq. cm. and graduated at a distance of 25cm. The needles point is an integral part of barrel which houses a calibrated spring. The spring is confined in a sleeve. The resistance offered by the concrete mortar is shown on the direct reading scale with a marker ring which holds its 2 position when released. 2 Scale range is 0-50kg/cm when the 2 penetration resistance reaches a 2 value of 35kg/cm the concrete is assumed initially set. Supplied complete in carrying case.