Calibration Equipment and Standards0 pages

Gauge Blocks

An inspection certificate is supplied as standard.
Refer to page IX for details.

Length Standards Brought to You by Mitutoyo

Automatic Gauge Block Interferometer GBI
(Interference fringe analyzing processing)

•Automatic primary-level measuring instrument for gauge
block lengths between 0.1mm and 250mm using optical
interference. GBI is a Twyman-Green interferometer
which employs the method of multiple wavelength
coincidence to calibrate lengths more accurately.
•The GBI automatically detects the distribution of
interference fringes with a CCD camera and processes
the data. Measurement of parallelism and flatness is
provided as well as lengths based on the phase shift
method and the interference fringe analysis software.
•The intensity and wavelength of the He-Ne laser light
sources are highly stable. This allows highly accurate and
repeatable measurement.
•Both the refractive index of air and the thermal expansion
of gauge blocks are automatically compensated for by
computer which is linked to a thermometer, hygrometer
and barometer.

SPECIFICATIONS
Metric
Range

0.1mm - 250mm

Number of gauge blocks
Measuring Uncertainty
can be mounted
(Coverage range factor k = 2) thatmeasuring table on
the
0.025µm+0.2x10 -6 L
L = Gauge block length (mm)

12

Light sources

Operating conditions

632.8nm frequency20±0.5°C
stabilized He-Ne laser Under mild temperature change
543.5nm frequency- without direct exposure to cold
stabilized He-Ne laser
or warm air

Gauge Block Comparator GBCD-100A
SERIES 565 - Automatic Comparator with Dual Gage Heads
•GBCD-100A measures the length of rectangular
gauge blocks in the size range 0.5mm to 100mm. It
automatically compares a test block with an appropriate
reference gauge block.
•The compensation result is not affected by the warp of
thinner gauge blocks due to the use of upper and lower
gaging heads (dual-head system).
•Measurement configuration: 1 cycle of automatic
comparison measurement with a standard gauge block.

E

•Compensation master for gauge block comparator

SPECIFICATIONS
Metric
Range

Resolution

Accuracy in narrow range
(20°C)

±(0.03+0.3L/1000)µm*
0.5mm - 100mm 0.00001mm (0.01µm) L = Gauge block length
(mm)

Type
Mu-Checker

Upper gage head
Measuring force
1N (100gf)

Special bridge-type block
Contact point
Carbide contact point
of radius of 20mm

516-145-E2

Lower gaging head
Operating conditions
Measuring force
Contact point
Carbide contact point of
Temperature: 20°C ±1°C
Mu-Checker
0.6N (60gf)
radius 5mm
Humidity: 58%RH ±15%RH
* Uncertainty of measurement at the 95% confidence level (not including the calibration error of the reference gauge block).
Note: To denote your AC power cable add the following suffixes to the order No.: A for UL/CSA, D for CEE, DC for CCC, E for BS,
K for KC, No suffix is required for JIS/100V
Type

E-31

Mitutoyo operates a policy of continuous improvement that aims to provide the customer with the benefit of the latest technological advances.
Therefore the company reserves the right to change any or all aspects of any product specification without notice.