U Grade Viscosity Oils Range

UKAS Laboratory Details

PRA Coatings Technology Centre is a calibration laboratory (Number 0804) accredited to ISO/IEC 17025 by the United Kingdom Accreditation Service (UKAS - see PRA’s UKAS details). The oils and certificates we supply all bear the UKAS accreditation mark.

The full range of PRA Viscosity Calibration Standards is listed below. If you require an oil with a viscosity outside the range listed, please contact us.

Oils are available in:

You will find information that will help you to select the most appropriate oil for calibrating flow cups or characterising viscometers in our Oils Selection Guide.

See also Notes on Units and our page on Accuracy and Uncertainty of Calibration.

Oil No.Previously
supplied as		Dynamic Viscosity
(Poise) at 25°C		Kinematic Viscosity
(Stokes) at 25°C		Viscosity [1]
(Krebs Units) at 25°C
U 0100 41 000.235 000.269 –
U 0200 1, 21 000.565 000.655 –
U 0400 2, 22 000.750 000.865 –
U 0600 3, 23 001.000 001.150 –
U 0800 4, 24 001.500 001.720 –
U 1000 5, 25 002.000 002.290 –
U 1200 6, 26 002.500 002.840 054
U 1400 7, 27 003.000 003.410 058
U 1600 8, 28 003.500 003.980 061
U 1800 9, 29 004.000 004.530 063
U 2000 10, 30 005.000 005.660 068
U 2200 11, 31 007.000 007.900 076
U 2400 12, 32 010.000 011.300 086
U 2600 13, 33 015.000 016.800 098
U 2800 14, 34 025.000 028.100 115
U 3000 15, 35 040.000 044.900 133
U 3100 15A 050.000 056.200 140
U 3200 16 060.000 067.400 –
U 3400 17 080.000 089.900 –
U 3600 18 100.000 112.000 –
U 3800 19 150.000 168.000 –
U 4000 20 200.000 225.000 –

Notes

  1. Please note that the values given in Krebs Units are outside the scope of our accreditation.