As Per IS : ASTM: C-403

For fast evaluation of the initial setting of concrete.

It can be used on light- weight concrete, special roof deck mixes and concrete additives.  

Specification:

Consists of a needle having face area 3/10 sq. cm. and graduated at a distance of 25 cm.

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 position when released.

Scale range is 0-50 kg/cm when the penetration resistance reaches a value of 35 kg/ cm2 the concrete is assumed initially set.

Supplied complete in wooden carrying case.