Length Comparator
Product Details:
It is used for measuring the drying shrinkage of concrete autoclave expansion of portland cement and potential expansive reactivity of cement aggregate combinations in mortar bars during storage, on self drying.
 
The apparatus comprises the following :

•  One frame consisting of one base plate, two pillars and a cross-bar. The cross-bar is adjustable up and down on the pillars.
•  One dial gauge, least count 0.002 mm, travel 5 mm which can be fixed to the crossbar. The plunger of the dial gauge has a concave spherical seating which sits over the reference studs of specimen bars while taking observation.
  
•  One reference bar of stainless steel with insulated handle.