Certified Standards for ASTM Test Methods
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


Click on the image to view a larger photo of the standards.

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.

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.

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

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

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

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

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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