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Certified Standards for ASTM Test Methods

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ISO 17025 Certified Viscosity Reference Standards

• 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

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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/IEC 17025 guidelines.

The viscosity 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 ASTM D1480 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.

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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.

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	Kinematic Viscosity Reference Standards
	Approximate Kinematic Viscosity in Centistokes

Catalog Number	Visc Std	20°C 68°F	25°C 77°F	37.8°C 100°F	40°C 104°F	50°C 122°F	60°C 140°F	98.9°C 210°F	100°C 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	0.97	—	—	—	—
355-002-003	S3	4.6	4	3	2.9	2.4	—	1.2	1.2
355-003-005	D5	7	6.1	—	4.2	3.4	—	—	1.5
355-002-006	S6	10	8.7	6	5.7	4.5	—	1.9	1.9
355-003-010	D10	14	12	8	7.5	5.8	—	2.3	2.3
355-004-010	N10	21	17	11	10	7.3	—	2.7	2.7
355-002-020	S20	43	34	20	18	13	—	4	3.9
355-004-035	N35	77	59	35	29	20	—	5.3	5.2
355-002-060	S60	165	121	60	54	35	—	7.7	7.5
355-004-100	N100	372	268	128	114	70	—	13	13
355-002-200	S200	672	468	200	181	107	—	18	17
355-003-500	D500	825	578	—	226	133	—	—	21
355-004-350	N350	1,255	865	371	324	186	—	28	27
355-003-103	D1000	1,689	1,151	—	418	236	—	—	32
355-002-600	S600	2,184	1,472	600	518	286	—	37	36
355-004-103	N1000	4,678	3,089	—	1020	542	350	—	57
355-002-203	S2000	8,323	5,422	2,000	1,719	889	—	87	83.3
355-003-503	D5000	8,800	5,700	2,150	1,850	950	—	—	88
355-003-752	D7500	13,296	8,609	2,681	—	1,365	—	—	118
355-004-403	N4000	17,889	11,470	—	3,448	1,720	850	—	137
355-002-803	S8000	34,931	22,383	8,000	6,710	3,317	—	—	242
355-004-153	N15000	79,423	49,714	—	13,994	6,650	3,000	—	406
355-002-304	S30000	—	84,687	28,079	23,570	11,058	—	—	628

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Saybolt Viscosity Reference Standards

Catalog Number	Viscosity Standard	SUS 100°F	SUS 210°F	SFS 122°C
355-002-020	S20	96.6	—	—
355-004-035	N35	152.1	—	—
355-002-060	S60	281	—	—
355-004-100	N100	592	—	—
355-002-200	S200	955	88.2	—
355-004-350	N350	—	131.5	—
355-002-600	S600	—	174	135.2
355-002-203	S2000	—	405	—

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	Cold-Cranking Simulator Viscosity Standards
	Approximate Dynamic Viscosity in Centipoise

Catalog Number	Viscosity Standard	-5°C 23°F	-10°C 14°F	-15°C 5°F	-20°C -4°F	-25°C -13°F	-30°C -22°F	-35°C -31°F
355-005-010	CL10	—	—	—	—	—	—	1,700
355-005-012	CL12	—	—	—	—	800	1,600	3,200
355-005-014	CL14	—	—	—	—	1,600	3,250	7,000
355-005-016	CL16	—	—	—	—	2,500	5,500	11,000
355-005-019	CL19	—	—	—	1,800	3,500	7,400	17,000
355-005-022	CL22	—	—	1,300	2,500	5,100	11,100	—
355-005-025	CL25	—	—	1,800	3,500	7,400	17,200	—
355-005-028	CL28	—	1,200	2,500	5,000	9,300	—	—
355-005-032	CL32	—	1,800	3,500	7,300	15,900	—	—
355-005-038	CL38	—	2,900	5,800	13,000	—	—	—
355-005-048	CL48	2,300	4,500	9,500	21,000	—	—	—
355-005-060	CL60	3,700	7,400	15,600	—	—	—	—
355-005-074	CL74	6,000	11,600	—	—	—	—	—

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Low Temperature Viscosity Reference Standards

Catalog Number	Viscosity Standard	Viscosities in centipoise at the following temperatures
355-005-027	N27B	-40, -30, -20, -15, -10, 0°F
355-005-115	N115ZB	-20, -15, -10, 0, +10, +20°F

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High Viscosity Standards (for asphalts & polymers)

Catalog Number	Viscosity Standard	20°C 68°F	25°C 77°F	60°C 140°F	60°C 140°F	135°C 275°F
		cP	cP	cP	cSt	cSt
355-004-600	N600	—	1,400	140	160	12
355-004-103	N1000	—	2,000	280	350	—
355-004-203	N2000	—	4,900	380	440	26
355-004-403	N4000	—	11,000	730	850	—
355-004-803	N8000	—	20,000	1,400	1,600	—
355-004-153	N15000	—	41,000	2,600	3,000	—
355-004-304	N30000	130,000	80,000	4,700	5,400	—
355-004-623	N62000	—	200,000	13,000	—	—
355-004-154	N150000	—	420,000	24,000	—	—
355-004-194	N190000	900,000	520,000	33,000	—	—
355-004-454	N450000	—	1,600,000	100,000	—	—
355-004-275	N2700000	—	5,300,000	340,000	—	—

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EquiLab

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