Length Comparators

LENGHT COMPARATOR

เครื่องมือทดสอบหาค่าการยืดหดตัวของคอนกรีต (Length Comparators)

Digital Lenght Comparator is used to determine the length changes on different type of cement prisms. The apparatus +consists of length measuring frame and measuring device. Digital dial gauge is 0.001 mm x 12.5 mm. Reference rod and moulds should be ordered separately according to test to perform.

Used to measure the length variations of mortar specimens after autoclave soundness tests. The top beam is adjustable to suit the specimen’s length. It also measures the linear shrinkage of specimens having different dimensions like:

– 40 x 40 x 160 mm EN 12617-4, EN 12808-4, ASTM C348, UNI 6687, NF P15-433, DIN 1164

– 25 x 25 x 250 mm ASTM C490

– 70.7 x 70.7 x 282.8 mm NF P18-427

– 75 x 75 x 254 mm BS 1881, 6073

– 50 x 50 x 200 mm EN 1367-04

Test Method  ASTM C 151, C 490 ; AASHTO M 210 , T 107

• MD-CM801 Digital Length Comparator Digital dial gauge is 12.5 mm. x 0.001 mm.
• MD-CM802 Reference rod, Invar, for 40 x 40 x 160 mm. EN 12617-4, EN 12808-4, ASTM C348, UNI 6687, NF P15-433, DIN 1164
• MD-CM803 Reference rod, Invar, for 25 x 25 x 250 mm ASTM C490
• MD-CM804 Reference rod, Invar, for 70.7 x 70.7 x 282.8 mm NF P18-427
• MD-CM805 Reference rod, Invar, for 75 x 75 x 254 mm BS 1881, 6073
• MD-CM806 Reference rod, Invar, for 50 x 50 x 200 mm EN 1367-04