Glass Capillary Viscometers
Size 400 Nominal constant 1.2 Viscosity range (mm2s-1,cSt) 240 to 1,200
PSL viscometers are constructed from low expansion borosilicate glass and the
precision bore tubing used for the capillary section is held to a close tolerance of ±0.01mm.
Calibration is carried out in the PSL Calibration Laboratory which has shown that it meets the
requirements of ISO 17025, by independent UKAS accreditation. The PSL Calibration Laboratory
maintains its own primary viscosity scale, based upon the internationally agreed value of distilled
water at 20°C of 1.0034mm2/s. Each calibration performed is one step away from this primary
scale, producing very low uncertainties of measurement.
Cannon-Fenske Opaque (Reverse Flow) Viscometers, with UKAS certificate.
ISO 3104, ISO 3105, ASTM D 445, ASTM D 446, ASTM D 2170, BS 188
Suitable for measuring transparent and opaque liquids, nominal overall length 295mm, approximate
sample size 12ml. Calibration data at 40°C with the constant, C, stated at 40°C and 100°C.