Easy access to commonly requested calibrations
As well as providing a wide range of calibration services, NPL has packaged the most commonly requested calibrations into a list of services. These represent standard configurations, calibration methods and a unique order reference code that can be included in quotation requests to allow quicker response from our customer service team.
NPL remains committed to continuing its full range of calibrations and if the exact service you require is not listed below, please contact us for a more bespoke quotation.
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Force transducer calibrations
This table represents the common force transducer calibration configurations. They are UKAS accredited up to 5 MN and can be offered according to BS EN ISO 376:2011 and/or ASTM E74– 18. In the case of BS EN ISO 376:2011 class capabilities these are 00 for forces up to 1.2 MN, 1 for the force range of 1.2 MN to 5 MN and 2 for incremental modes in the force range of 5 MN to 12 MN.
When ordering or enquiring please use the order reference code below and stipulate if you require BS EN ISO 376:2011, ASTM E74 – 18 or both.
Find out more information about our force transducer calibrations
| Maximum force |
Mode |
Forces Applied |
Uncertainty |
Order Reference |
| 2.5 kN |
Both |
Increasing & decreasing |
0.001% |
MF01-2000-CAL-FOR-COMPTENS-INCDEC2K-UKASMRA |
| Increasing only |
MF01-2010-CAL-FOR-COMPTENS-INC2K-UKASMRA |
| Compression |
Increasing & decreasing |
MF01-2030-CAL-FOR-COMP-INCDEC2K-UKASMRA |
| Increasing only |
MF01-2040-CAL-FOR-COMP-INC2K-UKASMRA |
| Tension |
Increasing & decreasing |
MF01-2050-CAL-FOR-TENS-INCDEC2K-UKASMRA
|
| Increasing only |
MF01-2060-CAL-FOR-TENS-INC2K-UKASMRA
|
| 20 kN |
Both |
Increasing & decreasing |
MF01-2070-CAL-FOR-COMPTENS-INCDEC20K-UKASMRA |
| Increasing only |
MF01-2080-CAL-FOR-COMPTENS-INC20K-UKASMRA |
| Compression |
Increasing & decreasing |
MF01-2090-CAL-FOR-COMP-INCDEC20K-UKASMRA |
| Increasing only |
MF01-3000-CAL-FOR-COMP-INC20K-UKASMRA |
| Tension
|
Increasing & decreasing |
MF01-3010-CAL-FOR-TENS-INCDEC20K-UKASMRA |
| Increasing only |
MF01-3020-CAL-FOR-TENS-INC20K-UKASMRA |
| 120 kN |
Both |
Increasing & decreasing |
MF01-3030-CAL-FOR-COMPTENS-INCDEC120K-UKASMRA |
| Increasing only
|
MF01-3040-CAL-FOR-COMPTENS-INC120K-UKASMRA |
| Compression |
Increasing & decreasing |
MF01-3050-CAL-FOR-COMP-INCDEC120K-UKASMRA |
| Increasing only |
MF01-3060-CAL-FOR-COMP-INC120K-UKASMRA |
| Tension |
Increasing & decreasing |
MF01-3070-CAL-FOR-TENS-INCDEC120K-UKASMRA |
| Increasing only |
MF01-3080-CAL-FOR-TENS-INC120K-UKASMRA |
| 1.2 MN |
Both |
Increasing & decreasing |
MF01-3090-CAL-FOR-COMPTENS-INCDEC1M-UKASMRA |
| Increasing only |
MF01-4000-CAL-FOR-COMPTENS-INC1M-UKASMRA |
| Compression |
Increasing & decreasing |
MF01-4010-CAL-FOR-COMP-INCDEC1M-UKASMRA |
| Increasing only
|
MF01-4020-CAL-FOR-COMP-INC1M-UKASMRA |
| Tension
|
Increasing & decreasing
|
MF01-4030-CAL-FOR-TENS-INCDEC1M-UKASMRA |
| Increasing only |
MF01-4040-CAL-FOR-TENS-INC1M-UKASMRA |
| 5 MN |
Both |
Increasing & decreasing |
0.05% |
MF01-4050-CAL-FOR-COMPTENS-INCDEC5M-UKASMRA |
| Increasing only
|
MF01-4060-CAL-FOR-COMPTENS-INC5M-UKASMRA |
| Compression |
Increasing & decreasing |
MF01-4070-CAL-FOR-COMP-INCDEC5M-UKASMRA
|
| Increasing only |
MF01-4080-CAL-FOR-COMP-INC5M-UKASMRA |
| Tension |
Increasing & decreasing |
MF01-4090-CAL-FOR-TENS-INCDEC5M-UKASMRA |
| Increasing only |
MF01-5000-CAL-FOR-TENS-INC5M-UKASMRA |
| 12 MN |
Compression |
Increasing & decreasing |
0.10% (increasing) 0.50% (decreasing) |
MF01-5010-CAL-FOR-COMP-INCDEC12M-NPLCAL |
| Increasing only |
MF01-5020-CAL-FOR-COMP-INC12M-NPLCAL |
| 30 MN |
Increasing & decreasing |
0.25% (increasing) 1.00% (decreasing) |
MF01-5030-CAL-FOR-COMP-INCDEC30M-NPLCAL |
| Increasing only |
MF01-5040-CAL-FOR-COMP-INC30M-NPLCAL |
Strain gauged column certification
UKAS-accredited concrete testing laboratories must have their strain gauged columns (strain cylinders) certified every two years. NPL certifies strain gauged columns in accordance with Annexes A2 and A3 of BS EN 12390-4:2019.
The certification of the strain gauged column includes the measurement of the height, diameter, flatness and parallelism of the end faces. A rotational test to determine the value of strain ratio, for the strain gauged column, is undertaken using NPL’s 3 MN reference compression machine. NPL has the facilities to refurbish the end faces of a strain cylinder if necessary.
When ordering or enquiring please use the order reference code below.
Find out more about our strain gauged column certification service
| Service description |
Order reference |
| Strain gauged column certification |
MF03-1010-CAL-FOR-STRCYL-STANDARD-UKAS |
Extensometer calibration rig calibration
NPL provides UKAS-accredited calibration of extensometer calibration rigs in both compression and tension directions. This conforms to both BS EN ISO 9513:2012 and ASTM E 83-16. The range of measurement is 0 mm to 1000 mm with an expanded uncertainty of
± (31 + 3.1R) nm where R is the extension in mm.
When ordering or enquiring please use the order reference code below.
Find out more about our extensimeter calibration services
| Service description |
Order reference |
| Calibration of an extensometer calibration rig in one direction (tension) |
MF06-1030-CAL-FOR-EXTENS-TENSION-UKAS |
| Calibration of an extensometer calibration rig in one direction (compression) |
MF06-1030-CAL-FOR-EXTENS-COMP-UKAS |
| Calibration of an extensometer calibration rig in both directions |
MF06-1030-CAL-FOR-EXTENS-FULL-UKAS |
| Adjustment and setting up of an extensometer calibration rig (if required) |
MF06-1020-CAL-FOR-EXTENS-ADJUST-UKAS |
Barometer calibrations
Barometers can be calibrated anywhere in the range 800 hPa to 1100 hPa, and we offer common barometer calibration configurations. Barometers are calibrated against a standard barometer with a rising and falling pressures at a series of points. The gas used for the calibration is normally compressed air. The UKAS accredited calibration accuracy for this service is ± 0.05 hPa.
Barometers must have a pressure connection port to enable them to be connected to a closed pneumatic system. Handheld battery-operated barometers can also be calibrated.
Find out more about our pressure calibrations
| Instrument |
Pressure range |
Protocol |
Order reference |
| Digital pressure indicator |
900 - 1050 hPa |
Regular 4-point test |
MP02-1010-CAL-FOR-BARO-DIGIT4PT-UKAS |
| Extended 9-point test |
MP02-1020-CAL-FOR-BARO-DIGIT9PT-UKAS |
Gas-operated pressure balance calibration
NPL provides a UKAS accredited calibration service pneumatically (gas) operated pressure balances. This table provides a list of the most common instrument calibration configurations. Uncertainties for the measurements are dependent on the pressure range. The best uncertainty level for the pressures in the calibration range is provided below.
Find out more about the method and uncertainties for our pressure calibrations
| Instrument |
Pressure range |
Best uncertainty |
Order reference |
| Budenberg 239 |
3.5 to 100 kPa |
0.0023 % |
MP03-1010-CAL-FOR-PRES-BUD239-UKASMRA |
| Budenberg 351 |
MP03-1010-CAL-FOR-PRES-BUD351-UKASMRA |
| Budenberg 240 |
60 to 700 kPa |
0.0021 % |
MP03-1020-CAL-FOR-PRES-BUD240-UKASMRA |
| Budenberg 352 |
MP03-1020-CAL-FOR-PRES-BUD352-UKASMRA |
| Budenberg 246 |
0.7 to 7.0 MPa |
0.0025 % + 0.25 ppm/MPa |
MP03-1030-CAL-FOR-PRES-BUD246-UKASMRA |
| Budenberg 346 |
MP03-1030-CAL-FOR-PRES-BUD346-UKASMRA |
| Budenberg 456 |
MP03-1030-CAL-FOR-PRES-BUD456-UKASMRA |
| Budenberg 354 |
0.1 to 4.0 MPa |
MP03-1060-CAL-FOR-PRES-BUD354-UKASMRA |
| Budenberg 454 |
MP03-1060-CAL-FOR-PRES-BUD454-UKASMRA |
| D&H Gauge |
0.1 to 4.0 MPa |
MP03-1110-CAL-FOR-PRES-DH4M-UKASMRA |
| 0.2 to 7.0 MPa |
MP03-1130-CAL-FOR-PRES-DH7M-UKASMRA |
| 0.7 to 21.0 MPa |
0.0025 % + 1.1 ppm/MPa |
MP03-1140-CAL-FOR-PRES-DH7M-UKASMRA |
| Ruska 2465 (Gauge & Absolute) |
0.1 to 7 MPa |
0.0025 % + 0.25 ppm/MPa |
MP03-1230-CAL-FOR-PRES-R2465GA7M-UKASMRA |
| 3.5 to 175 kPa |
0.0023 % |
MP03-1280-CAL-FOR-PRES-R2465GA175K-UKASMRA |
| 16 to 700 kPa |
0.0021 %
|
MP03-1320-CAL-FOR-PRES-R2465GA700K-UKASMRA |
| Ruska 2465 (Gauge or Absolute) |
0.1 to 7 MPa |
0.0025 % + 0.25 ppm/MPa |
MP03-1240-CAL-FOR-PRES-R2465T7M-UKASMRA |
| 3.5 to 175 kPa |
0.0023 % |
MP03-1290-CAL-FOR-PRES-R2465T175K-UKASMRA |
| 16 to 700 kPa |
0.0021 % |
MP03-1330-CAL-FOR-PRES-R2465T700K-UKASMRA |
Oil-operated pressure balance calibration
NPL provides a UKAS accredited calibration service hydraulically (oil) operated pressure balances. This table provides a list of the most common instrument calibration configurations. Uncertainties for the measurements are dependent on the pressure range. The best uncertainty level for the pressures in the calibration range is provided below.
Find out more about the method and uncertainties for our pressure calibrations
| Instrument |
Pressure Range |
Best Uncertainty |
Order Reference |
| Budenberg 280 |
7.2 to 140 MPa |
0.0031% + 0.24 ppm/MPa |
MP04-1040-CAL-FOR-HYDR-BUD280T140M-UKASMRA |
| Budenberg 380 |
MP04-1040-CAL-FOR-HYDR-BUD380T140M-UKASMRA |
| Budenberg 480
|
MP04-1040-CAL-FOR-HYDR-BUD480T140M-UKASMRA |
| Budenberg 354 |
0.5 to 6.5 MPa |
MP04-1070-CAL-FOR-HYDR-BUD354T6M-UKASMRA |
| Budenberg 454
|
MP04-1070-CAL-FOR-HYDR-BUD454T6M-UKASMRA |
| Budenberg 368 |
1.2 to 21.1 MPa |
MP04-1080-CAL-FOR-HYDR-BUD368T21M-UKASMRA |
| Budenberg 368 |
4 to 145 MPa |
MP04-1080-CAL-FOR-HYDR-BUD368T145M-UKASMRA |
| Budenberg 280 |
0.5 to 7.6 MPa |
MP04-1100-CAL-FOR-HYDR-BUD280T7M-UKASMRA |
| Budenberg 380 |
MP04-1100-CAL-FOR-HYDR-BUD380T7M-UKASMRA |
| Budenberg 480 |
MP04-1100-CAL-FOR-HYDR-BUD480T7M-UKASMRA |
| Budenberg 280 |
0.6 to 7.0 MPa |
0.0031% + 0.24 ppm/MPa |
MP04-1420-CAL-FOR-HYDR-BUD280T7M-UKASMRA |
| Budenberg 380 |
MP04-1420-CAL-FOR-HYDR-BUD380T7M-UKASMRA |
| Budenberg 480 |
MP04-1420-CAL-FOR-HYDR-BUD480T7M-UKASMRA |
| Budenberg 280 |
6.0 to 70 MPa |
MP04-1420-CAL-FOR-HYDR-BUD280T70M-UKASMRA |
| Budenberg 380 |
MP04-1420-CAL-FOR-HYDR-BUD380T70M-UKASMRA |
| Budenberg 480 |
MP04-1420-CAL-FOR-HYDR-BUD480T70M-UKASMRA |
| D&H (0.1 MPa/kg) |
0.5 to 10 MPa |
MP04-1120-CAL-FOR-HYDR-DH10M-UKASMRA |
| D&H (0.5 MPa/kg) |
0.5 to 50 MPa |
MP04-1140-CAL-FOR-HYDR-DH50M-UKASMRA |
| D&H (1 MPa/kg) |
1 to 100 MPa |
MP04-1150-CAL-FOR-HYDR-DH100M-UKASMRA |
| D&H (2 MPa/kg) |
2 to 200 MPa |
MP04-1160-CAL-FOR-HYDR-DH200M-UKASMRA |
| D&H (200 psi/kg) |
2 to 140 MPa |
MP04-1170-CAL-FOR-HYDR-DH140M-UKASMRA |
| D&H (250 psi/kg) |
2 to 172 MPa |
MP04-1180-CAL-FOR-HYDR-DH172M-UKASMRA |
| D&H (5 MPa/Kg) |
5 to 200 MPa |
0.0038% + 0.24 ppm/MPa |
MP04-1190-CAL-FOR-HYDR-DH500M-UKASMRA |
| Ruska 2485 (1.96 mm²) |
7.0 to 200 MPa |
.0038% + 0.24 ppm/MPa |
MP04-1340-CAL-FOR-HYDR-R2485T500M-UKAS |
| Ruska 2485 (142mm²) |
0.5 to 7.0 MPa |
0.0031% + 0.24 ppm/MPa |
MP04-1350-CAL-FOR-HYDR-R2485T7M-UKASMRA |
| Ruska 2485 (14.2mm²) |
0.7 to 70 MPa |
MP04-1360-CAL-FOR-HYDR-R2485T70M-UKAS |
| Ruska 2485 (19.6mm²) |
0.5 to 50 MPa |
MP04-1370-CAL-FOR-HYDR-R2485T50M-UKAS |
| Ruska 2485 (196mm²) |
0.5 to 5.0 MPa |
MP04-1380-CAL-FOR-HYDR-R2485T5M-UKAS |
| Ruska 2485 (2.38 mm²) |
27 to 414 MPa |
.0038% + 0.24 ppm/MPa |
MP04-1390-CAL-FOR-HYDR-R2485T414M-UKAS |
| Ruska 2485 (7.11mm²) |
5.0 to 140 MPa |
0.0031% + 0.24 ppm/MPa |
MP04-1400-CAL-FOR-HYDR-R2485T140M-UKAS |
| Ruska 2485 (9.82mm²) |
1.0 to 100 MPa |
MP04-1410-CAL-FOR-HYDR-R2485T100M-UKAS |
Mass calibration
NPL provides a UKAS accredited calibration service for masses from 0.05 mg up to 50 kg. This table provides a list of the most common weight calibration configurations which covers reference weights as well as E1, E2 and F1 classes of calibration weights.
For orders covering partial sets, additional weights or requiring multiple individual weights please stipulate multiples of the order reference relating to individual weights. For a complete set of 30 weights spanning 20 kg to 1 mg, a separate code can be used.
Find out more about the method and uncertainties for our mass calibrations
| Accuracy |
Type |
Order reference |
| Reference |
20 kg to 1 mg weight set (30 items) |
MM01-1030-CAL-FOR-MASS-REFSET-UKASMRA |
| Individual weight (20 kg) |
MM01-1030-CAL-FOR-MASS-REFWT1-UKASMRA |
| Individual weight (>100 g – 10 kg) |
MM01-1030-CAL-FOR-MASS-REFWT2-UKASMRA |
| Individual weight (>10 g – 100 g) |
MM01-1030-CAL-FOR-MASS-REFWT3-UKASMRA |
| Individual weight (0.05 mg – 10 g) |
MM01-1030-CAL-FOR-MASS-REFWT4-UKASMRA |
| E1
|
20 kg to 1 mg weight set (30 items) |
MM01-1000-CAL-FOR-MASS-E1SET-UKASMRA |
| Individual weight (20 kg) |
MM01-1000-CAL-FOR-MASS-E1WT1-UKASMRA |
| Individual weight (>100 g – 10 kg) |
MM01-1000-CAL-FOR-MASS-E1WT2-UKASMRA |
| Individual weight (>10 g – 100 g) |
MM01-1000-CAL-FOR-MASS-E1WT3-UKASMRA |
| Individual weight (0.05 mg – 10 g) |
MM01-1000-CAL-FOR-MASS-E1WT4-UKASMRA |
| E2 |
20 kg to 1 mg weight set (30 items) |
MM01-1010-CAL-FOR-MASS-E2SET-UKASMRA |
| Individual weight (20 kg) |
MM01-1000-CAL-FOR-MASS-E2WT1-UKASMRA |
| Individual weight (>100 g – 10 kg) |
MM01-1000-CAL-FOR-MASS-E2WT2-UKASMRA |
| Individual weight (>10 g – 100 g) |
MM01-1000-CAL-FOR-MASS-E2WT3-UKASMRA |
| Individual weight (0.05 mg – 10 g) |
MM01-1000-CAL-FOR-MASS-E2WT4-UKASMRA |
| F1 |
20 kg to 1 mg weight set (30 items) |
MM01-1020-CAL-FOR-MASS-F1SET-UKASMRA |
| Individual weight (20 kg)
|
MM01-1020-CAL-FOR-MASS-F1WT1-UKASMRA |
| Individual weight (>100 g – 10 kg) |
MM01-1020-CAL-FOR-MASS-F1WT2-UKASMRA |
| Individual weight (>10 g – 100 g) |
MM01-1020-CAL-FOR-MASS-F1WT3-UKASMRA |
| Individual weight (0.05 mg – 10 g) |
MM01-1020-CAL-FOR-MASS-F1WT4-UKASMRA |
If you would like to order any of these services, or require further information, please contact us and quote the order reference codes from the tables above.