• Viscosity Standards (ASTM)

Viscosity Standards (ASTM)


  • Manufactured and certified according to ASTM D2162, the primary method for viscosity reference standards
  • Supplied with an ISO/IEC 17025 Certification Report
  • Fully compliant to ASTM and related test procedures
  • Custom standards available

Koehler viscosity reference standards are used for calibration and verification of kinematic and dynamic viscosity test equipment, both manual and automatic. All viscosity standards are based upon the National Institute of Standards and Technology (NIST) value of 1.0034 cSt (Centistokes) for water at 20°C (68°F). All standards are traceable to National Standards and are manufactured and certified according to ASTM D2162, the internationally recognized primary method for viscosity reference standards, under ISO/IEC17025 guidelines. Standards are calibrated to a precision of ±0.2% for the viscosity and kinematic viscosity. Nominal or approximate values are listed in the following tables. With each standard, actual certified values for kinematic viscosity (cSt), dynamic viscosity (cP), and density (g/mL) according to ASTMD1480 are provided at each temperature point of calibration along with uncertainty measurements. Each standard is calibrated at a minimum of five temperatures and supplied in a 500mL quantity in an amber-colored bottle complete with full certification and a Material Data Safety Sheet (MSDS).In addition to the many viscosity standards described in this catalog, we can supply custom viscosity standards made specifically to meet your individual needs including high volume supply used for Statistical Quality Check and Statistical Process Control (SQC/SPC) applications.

Important Information About Viscosity Standards

All Koehler certified viscosity standards are Newtonian fluids manufactured from high stability base oils and polybutenes. The standards have an expiration date on the label at least twelve months or longer from the date of purchase. With time, changes resulting from slow oxidation or loss of volatiles may occur. These changes can be minimized by storing the standard in the closed bottle at ambient laboratory temperatures and out of sunlight. The expiration date on the label is part of Koehler’s program of total quality control and is intended to ensure that the standard will be utilized while the certified viscosity data remains valid.

Viscosity Table
Catalog Visc. 20°C 25°C 37.8°C 40°C 50°C 60°C 80°C 98.9°C 100°C
Number Std. 68°F 77°F 100°F 104°F 122°F 140°F 176°F 210°F 212°F
355-004-004 N.4 0.47 0.45 0.41 0.4 — — — — —
355-004-008 N.8 0.95 0.89 0.77 0.75 — — — — —
355-004-001 N1.0 1.3 1.2 1.0 0.97 — — — — —
355-004-002 N2 2.9 2.6 2.1 2.0 1.7 — 1.1 0.95 0.93
355-002-003 S3 4.6 4.0 3.0 2.9 2.4 — 1.5 1.2 1.2
355-003-005 D5 7.0 6.1 — 4.2 3.4 — — — 1.5
355-002-006 S6 10 8.7 6.0 5.7 4.5 — 2.4 1.9 1.9
355-003-010 D10 14 12 8.0 7.5 5.8 — — 2.3 2.3
355-004-007 N7.5 14 12 8.0 7.5 5.8 — 3.1 2.3 2.3
355-004-010 N10 21 17 11 10 7.3 — 3.5 2.7 2.7
355-004-014 N14 30 25 15 14 10 — 5.0 3.5 3.4
355-002-020 S20 43 34 20 18 13 — 5.6 4.0 3.9
355-004-026 N26 57 46 27 25 18 — 7.9 5.3 5.2
355-004-035 N35 77 59 35 29 20 — 8.5 5.3 5.2
355-004-044 N44 110 86 48 44 30 — 12 7.7 7.5
355-002-060 S60 165 121 60 54 35 — 12 7.7 7.5
355-004-075 N75 200 150 82 75 50 — 19 12 12
355-004-100 N100 372 268 128 114 70 — 19 13 13
355-004-140 N140 400 300 160 140 90 — 31 19 18
355-002-200 S200 672 468 200 181 107 — 40 18 17
355-004-250 N250 770 570 280 250 160 — 51 30 29
355-003-500 D500 825 578 — 226 133 — — — 21
355-004-350 N350 1255 865 371 324 186 — 60 28 27
355-004-415 N415 1400 990 470 420 250 — 77 43 41
355-003-103 D1000 1689 1151 — 418 236 — — — 32
355-002-600 S600 2184 1472 600 518 286 — 92 37 36
355-004-750 N750 2600 1900 850 750 440 — 130 68 66
355-004-103 N1000 4678 3089 — 1020 542 350 150 — 57
355-004-142 N1400 5100 3600 — 1400 820 510 220 — 120
355-002-203 S2000 8323 5422 2000 1719 889 — 160 87 83.3
355-003-503 D5000 8800 5700 2150 1850 950 — — — 88
355-004-252 N2500 10400 7000 — 2500 1300 750 290 — 140
355-003-752 D7500 13296 8609 2681 — 1365 — — — 118
355-004-403 N4000 17889 11470 — 3448 1720 850 290 — 137
355-004-512 N5100 28000 18000 — 5100 2500 1300 420 — 170
355-002-803 S8000 34931 22383 8000 6710 3317 — 530 — 242
355-004-102 N10200 58000 36000 — 10200 4900 2500 775 — 300
355-004-153 N15000 79423 49714 — 13994 6650 3000 980 — 406
355-004-183 N18000 103000 64000 — 18000 8500 4300 1320 — 500
355-002-304 S30000 — 84687 28079 23570 11058 — 1700 — 628
Saybolt Viscosity Table
Catalog Visc. SUS SUS SFS
Number Std. 100°F 210°F 122°F
355-002-020 S20 96.6 — —
355-004-026 N26 130 — —
355-004-035 N35 152.1 — —
355-004-044 N44 220 — —
355-002-060 S60 281 — —
355-004-100 N100 592 — —
355-004-140 N140 720 — —
355-002-200 S200 955 88.2 —
355-004-250 N250 1300 —
355-004-350 N350 — 131.5 —
355-004-415 N415 2180 200 —
355-002-600 S600 — 174 135.2
355-002-203 S2000 — 405 —