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CMCs General Physics (33)
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Dimensional metrology (33)
End standards (9)
Surface texture standards (6)
Diameter standards (5)
Flatness standard (3)
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2-D, 3-D instruments (2)
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Thailand (33)
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Thailand, NIMT (National Institute of Metrology (Thailand))
Complete CMCs in Length for Thailand (.PDF file)
Surface texture standards. Roughness standard, ISO 5436-1 type C, D: Rz (ISO 4287), 0.025 µm to 32 µm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[18, 17Rz], Rz in µm, values range from 18 nm to 5.4E+02 nm
Stylus instrument
Rz (ISO 4287): ISO 4287, ISO 4288, ISO 11562
Approved on 28 April 2010
Internal NMI service identifier: NIMT/08060-10601
 
2-D, 3-D instruments. CMM: error of indicated [size; location; shape], up to 1200 x 1000 x 700 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.52, 1.4E-03L], L in mm
Comparison with gauge blocks
CMM size: < 1200 mm x 1000 mm x 700 mm
Approved on 26 January 2012
 
2-D, 3-D instruments. CMM: error of indicated [size; location; shape], up to 1200 x 1000 x 700 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.52, 2.0E-03L], L in mm
Comparison with step gauges
CMM size: < 1200 mm x 1000 mm x 700 mm
Approved on 26 January 2012
 
End standards. Step gauge: face spacing, 0 mm to 1020 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.26, 1.4E-03L], L in mm
CMM with laser interferometer
Step gauge size: < 1020 mm
Approved on 26 January 2012
 
End standards. Caliper checker: face spacing, 0 mm to 1020 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.30, 2.7E-03L], L in mm
CMM with laser interferometer
Caliper checker size: < 1020 mm
Approved on 26 January 2012
 
CMM artefacts. Ball plate: 2D center coordinates, up to 620 x 620 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.27, 1.9E-03L], L in mm
CMM with laser interferometer using swing round method
Ball plate size: < 620 mm x 620 mm
Approved on 26 January 2012
 
Surface texture standards. Depth standard, (ISO 5436-1, type A), depth d, 0.01 µm to 10 µm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[2.4, 5.4d], d in µm
Interference microscope and stylus instrument (for pre-measurement)
Groove depth: ISO 5436-1
Approved on 26 January 2012
 
Surface texture standards. Depth standard, (ISO 5436-1, type A), depth d, 0.3 µm to 50 µm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[75, 7.3d], d in µm
Non-contact optical profiler
Groove depth: ISO 5436-1
Approved on 26 January 2012
 
Line standard. Precision line scale: line spacing, 0 mm to 500 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[41, 0.1L], L in mm
Line scale interferometer
Glass scale: low coefficient of thermal expansion (8E-08 K-1)
Approved on 10 April 2018
 
Line standard. Precision line scale: line spacing, 0 mm to 1000 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.11, 2.9E-03L], L in mm
Line scale interferometer
Glass scale: working standard
Approved on 26 January 2012
 
Surface texture standards. Spacing standard (e.g. ISO 5436-1 Type C): wavelength parameterss, 0.1 µm to 1000 µm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.58, 0.02Sm], Sm in µm, values range from 0.58 µm to 20.0 µm
Stylus instrument
Rsm, Sm: ISO 5436-1
Approved on 10 April 2018
Internal NMI service identifier: NIMT/08061-10501
 
Diameter standards. External cylinder (Plug, Pin, Wire) : External Diameter, 0.1 mm to 300 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: Q[0.23, 1.0E-03D], D in mm, range from 0.23 µm to 0.38 µm
1-D measuring machine (direct method)
Approved on 10 April 2018
Internal NMI service identifier: NIMT/08041-10501-10703
 
End standards. Gauge block: central length L, 0.5 mm to 125 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[26, 0.35L], L in mm, values range from 26.0 nm to 50.9 nm
Interferometry exact fractions
Material: steel
Approved on 10 April 2018
Internal NMI service identifier: NIMT/08020-10101
 
End standards. Gauge block: central length L, 0.5 mm to 125 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[26, 0.29L], L in mm, values range from 26.0 nm to 44.6 nm
Interferometry exact fractions
Material: ceramic
Approved on 10 April 2018
Internal NMI service identifier: NIMT/08020-10101
 
End standards. Gauge block: central length L, 0.5 mm to 125 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[26, 0.18L], L in mm, values range from 26.0 nm to 34.4 nm
Interferometry exact fractions
Material: tungsten carbide
Approved on 10 April 2018
Internal NMI service identifier: NIMT/08020-10101
 
End standards. Gauge block: central length L, 0.5 mm to 125 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[26, 0.27L], L in mm, values range from 26.0 nm to 42.6 nm
Interferometry exact fractions
Material: chromium carbide
Approved on 10 April 2018
Internal NMI service identifier: NIMT/08020-10101
 
End standards. Gauge block: central length L, 0.5 mm to 125 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[50, 0.50L], L in mm, values range from 50 nm to 1.2E+02 nm
Mechanical comparison
Material: steel, tungsten carbide and chromium carbide
Approved on 28 April 2010
Internal NMI service identifier: NIMT/08020-10301
 
End standards. Gauge block: central length L, 0.5 mm to 125 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[70, 0.50L], L in mm, values range from 70 nm to 1.4E+02 nm
Mechanical comparison
Material: ceramic
Approved on 28 April 2010
Internal NMI service identifier: NIMT/08020-10301
 
End standards. Gauge block: central length L, 150 mm to 1000 mm
Absolute expanded uncertainty (k = 2, level of confidence 95%) in nm: Q[50, 0.80L], L in mm, values range from 1.3E+02 nm to 8.5E+02 nm
Mechanical comparison
Material: steel
Approved on 28 April 2010
Internal NMI service identifier: NIMT/08020-10501, 08020-10502, 08020-10503
 
Diameter standards. External cylinder (plain plug gauge): diameter, 0.1 mm to 1 mm
Absolute expanded uncertainty (k = 2, level of confidence 95 %) in µm: 0.24
1-d comparator and 2 contacting probes
Approved on 28 April 2010
Internal NMI service identifier: NIMT/08040-10501