Mahr Metrology India Pvt. Ltd. Manufactures Precise Gage Block Comparator. Mahr Metrology India Pvt. Ltd. Is an ISO9001:2008 and ISO 17025:2005 certified company that also manufactures products like Testing And Measuring Instruments, Stands, Sensors & Indicators, Micrometers, Pumps, Metering & Dosing Pumps, Ball Bearings, Measuring Instruments, Motor Controllers, Calipers Precise Gage Block Comparator is designed for the measurement of gage blocks by comparison. The Precise Gage Block Comparator comes with a unique "Floating Measuring Frame" assures true point-to-point measurement. The Precise Gage Block Comparator has single sensor design for the lowest possible electronic noise and precise counterbalancing for control of measurement forces.