Measurement Standards	Reference Documents	Best Measurement  Capability	Range	Calibrated Instruments
Automatic Gauge Block Interferometer	Instruction Manual of TESA Interferometer	from 0.024 to 0.038 µm	0.5 – 100 mm	Gauge Blocks
Standard Gauge Blocks; TESA UPC Comparator	Instruction Manual of TESA Comparator	from 0.05 to 0.10 µm	0.5 – 100 mm	Gauge Blocks
Standard Gauge Blocks and / or Length Bars; Federal Comparator	Instruction Manual of Federal Comparator	from 0.04 to 0.3 µm	25 - 600 mm	Gauge Blocks and Length Bars
Standard Gauge Blocks and / or Length Bars; Matrix Level Comparator	BCS The Calibration of Length Bars	from 0.6 to 1.2 µm	600 – 1200 mm	Gauge Blocks and Length Bars