Measurand / artefact

Measurand level
or range

Expanded uncertainty

Central length / Gauge blocks
(interferometric measurement)

0,5 mm up to 200 mm

Q[20; 0,18 L] in nm;
L in mm

Length difference / Pairs of gauge blocks
(interferometric measurement)

0,5 mm up to 100 mm

10 to 14 nm

Central length / Gauge blocks
(interferometric measurement)

100 mm up to 1000 mm

Q[22; 0,066 L] in nm;
L in mm

Thermal expansion / Gauge blocks
(interferometric measurement)

60 mm up to 1000 mm

Q[2,4/L; 2,2; 0,46α]
in 10^{-9 .} K^-1; L in m;
α in 10^{-9 .} K^-1

Thermal expansion / Gauge blocks
(mechanical measurement)

60 mm up to 100 mm

1,6 ... 1,1 ^. 10^{-7 .} K^-1

Central length / Gauge blocks
(mechanical measurement)

200 mm up to 1000 mm

Q[30; 0,12L] in nm;
L in mm

Thermal expansion / Gauge blocks
(mechanical measurement)

125 mm up to 1000 mm

12 ... 3,6 ^. 10^{-8 .} K^-1

Special measurments

200 mm up to 4 000 mm

on request