Innovative Oil Condition Monitoring

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eralytics all-new ERALAB OCM

Cost savings and improved operational efficiency: Unplanned downtime due to machine breakdowns can affect production schedules and profitability. Oil condition monitoring helps predict and prevent such breakdowns, reducing unplanned maintenance and the associated costs. Regular in-service oil analysis enables a predictive maintenance approach where repairs or replacements are scheduled during planned downtime, minimizing operational disruption and maximizing overall efficiency. By maintaining optimal oil condition, companies can significantly extend the life and performance of their machines.

With the ERALAB OCM, eralytics offers a range of new, versatile, and combinable products to meet the above-mentioned challenges for a comprehensive oil analysis in the laboratory as well as on-site.

The RDE-OES spectrometer ERAOIL, the kinematic viscometer ERAVISC X, the particle counter ERACOUNT XS and the FTIR spectrometer ERASPEC OIL mark the beginning of the next era of oil condition monitoring.

The key to modern oil-analysis is our RDE-OES spectrometer ERAOIL measuring contaminations, and additives in lubricating oils inside engines, transmissions, hydraulic systems, and gears boxes. Its unique design includes a built-in PC, touchscreen, sharpening device, and ventilation system. The ERAOIL RDE-OES spectrometer measures up to 32 elements in 30 seconds with sub-ppm LOD.

With the portable FTIR spectrometer ERASPEC OIL, detailed lubricant and diesel fuel analyses are carried out fully automatically in seconds. It is the analyzer of choice for monitoring degradation, additive depletion, and contaminations. In addition to direct trending and spectral subtraction analysis according to ASTM, DIN and JOAP methods, ERASPEC OIL allows for the fast and simple determination of TAN and TBN.

The compact and most robust kinematic viscometer ERAVISC X with its revolutionary capillary viscosity cell is a real game changer for high-precision kinematic viscosity testing at any temperature between 15 °C and 100 °C. Latest Peltier Technology allows for automated, high precision viscosity index measurement within 60 seconds. The unique design of the ERAVISC X additionally includes eralytics’ x-oscillating metal U-tube density meter module that allows for simultaneous ASTM D4052 density testing with 5-digit precision.

Our latest analyzer for oil condition monitoring, the world smallest ISO 4406 particle counter ERACOUNT XS is the analyzer of choice for fastest particle measurements with laboratory precision directly in the field. At the push of a button, the laser-based analyzer measures and displays the ISO 4406 particle size channels ≥ 4 µm(c), ≥ 6 µm(c) and ≥ 14 µm(c) – all within 60 seconds using only 10 mL of sample. If connected to one of eralytics’ other OCM analyzers the ERACOUNT XS even offers detailed counting and scaling of all eight ISO 4406 particle size channels. The instrument is calibrated according to the international standard ISO 11171 and traceable to NIST standards.

Shaker Speed Bias on Crude Oils from ASTM D6377-2020

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Recently Parkes Scientific, along with eralytics worked to gather preliminary data showing the extreme bias that can result from insufficient shaking even when strictly following ASTM D6377-2020. These findings were presented to the CCQTA September 2020 meetings during the General Forum.


A condensed version of the issue is that ASTM D6377 specifies only a minimum of 1.5 c/s (cycles per second) of agitation to reach equilibrium. The application note that eralytics' created shows data indicating that the reproducibility of the method (R = 4.26 kPa) can be greatly exceeded. This appears to be consistently common for compositions of products with high density and high viscosities. Biases up to 7.7 kPa have been recorded. Biases in excess of 12 kPa have been reported but not formally recorded.


Below are the conclusions from the application note.

  • A higher shaking speed leads to a higher VPCR.
  • The difference between a VPCR result obtained with a shaking speed of 1.5 c/s and 4.5 c/s can be as large as 7.7 kPa (1.12 psi).
  • Applying shaking speeds of 4.5 c/s or above eventually lead to the formation of a thermodynamic equilibrium vapor pressure.
  • A VPCR result obtained at higher shaking speed (4.5 c/s or above) is closer to (or at) the actual thermodynamic equilibrium vapor pressure, meaning this result is more accurate.
  • The measurement time for ASTM D6377 can be reduced significantly by increasing the shaking speed.
  • For ERAVAP a shaking speed of 4.5 c/s (= “36” in the method parameters) was found to be the optimum setting for ASTM D6377 measurements.
Resources and Links
Updates to this Post
  • November 26, 2020: Links added to CCQTA advisory.

ASTM E1-2014 Liquid-In-Glass Thermometer Listing

ASTM E1-2014 is the Standard Specification for ASTM Liquid-in-Glass Thermometers. It defines 201 thermometers which are below. You can find links to the variations of these thermometers that we offer by clicking on the corresponding ASTM No. link. You can click on the column headers to sort the table.

ASTM No. IP No. Temp. Range Application Subdivisions Immersion
1C -20 to 150°C Partial Immersion 76 mm
1F 0 to 302°F Partial Immersion 76 mm
2C 62C -5 to 300°C Partial Immersion 76 mm
2F 62F 20 to 580°F Partial Immersion 76 mm
3C 73C -5 to 400°C Partial Immersion 76 mm
3F 73F 20 to 760°F Partial Immersion 76 mm
5C 1C -38 to 50°C Cloud and Pour 108 mm
5F 1F -36 to 120°F Cloud and Pour 108 mm
6C 2C -80 to 20°C Cloud and Pour 76 mm
6F 2F -112 to 70°F Cloud and Pour 76 mm
7C 5C -2 to 300°C Distillation Total
7F 30 to 580°F Distillation Total
8C 6C -2 to 400°C Distillation Total
8F 30 to 760°F Distillation Total
9C 15C -5 to 110°C Pensky-Martens 0.5° 57 mm
9F 15F 20 to 230°F Pensky-Martens 57 mm
10C 16C 90 to 370°C Pensky-Martens 57 mm
10F 16F 200 to 700°F Pensky-Martens 57 mm
11C 28C -6 to 400°C Open Flash 25 mm
11F 28F 20 to 760°F Open Flash 25 mm
12C 64C -20 to 102°C Density Wide Range (Gravity) 0.2° Total
12F 64F -5 to 215°F Density Wide Range (Gravity) 0.5° Total
13C 47C 155 to 170°C Loss On Heat 0.5° Total
14C 17C 38 to 82°C Paraffin Wax Melting Point 0.1° 79 mm
14F 17F 100 to 180°F Paraffin Wax Melting Point 0.2° 79 mm
15C 60C -2 to 80°C Softening Point 0.2° Total
15F 30 to 180°F Softening Point 0.5° Total
16C 61C 30 to 200°C Softening Point 0.5° Total
16F 85 to 392°F Softening Point Total
17C 19 to 27°C Saybolt Viscosity 0.1° Total
17F 66 to 80°F Saybolt Viscosity 0.2° Total
18C 23C 34 to 42°C Saybolt Viscosity 0.1° Total
18F 23F 94 to 108°F Saybolt Viscosity 0.2° Total
19C 49 to 57°C Saybolt Viscosity 0.1° Total
19F 120 to 134°F Saybolt Viscosity 0.2° Total
20C 57 to 65°C Saybolt Viscosity 0.1° Total
20F 134 to 148°F Saybolt Viscosity 0.2° Total
21C 79 to 87°C Saybolt Viscosity 0.1° Total
21F 174 to 188°F Saybolt Viscosity 0.2° Total
22C 24C 95 to 103°C Saybolt Viscosity 0.1° Total
22F 24F 204 to 218°F Saybolt Viscosity 0.2° Total
23C 18 to 28°C Engler Viscosity 0.2° 90 mm
24C 39 to 54°C Engler Viscosity 0.2° 90 mm
25C 95 to 105°C Engler Viscosity 0.2° 90 mm
26C 130 to 140°C Stability Test Of Soluble Nitrocellulose 0.1° Total
27C 147 to 182°C Turpentine Distillation 0.5° 76 mm
28C 31C 36.6 to 39.4°C Kinematic Viscosity 0.05° Total
28F 97.5 to 102.5°F Kinematic Viscosity 0.1° Total
29C 34C 52.6 to 55.4°C Kinematic Viscosity 0.05° Total
29F 127.5 to 132.5°F Kinematic Viscosity 0.1° Total
30F 207.5 to 212.5°F Kinematic Viscosity 0.1° Total
33C 20C -38 to 42°C Aniline Point 0.2° 50 mm
33F -36.5 to 107.5°F Aniline Point 0.5° 50 mm
34C 21C 25 to 105°C Aniline Point 0.2° 50 mm
34F 77 to 221°F Aniline Point 0.5° 50 mm
35C 59C 90 to 170°C Aniline Point 0.2° 50 mm
35F 194 to 338°F Aniline Point 0.5° 50 mm
36C -2 to 65°C Titer Test 0.2° 45 mm
37C 77C -2 to 52°C Solvents Distillation 0.2° 100 mm
38C 78C 24 to 78°C Solvents Distillation 0.2° 100 mm
39C 79C 48 to 102°C Solvents Distillation 0.2° 100 mm
40C 80C 72 to 126°C Solvents Distillation 0.2° 100 mm
41C 81C 98 to 152°C Solvents Distillation 0.2° 100 mm
42C 82C 95 to 255°C Solvents Distillation 0.5° 100 mm
43C 65C -51.6 to -34°C Kinematic Viscosity 0.1° Total
43F 65F -61 to -29°F Kinematic Viscosity 0.2° Total
44C 29C 18.5 to 21.5°C Kinematic Viscosity 0.05° Total
44F 29F 66.5 to 71.5°F Kinematic Viscosity 0.1° Total
45C 30C 23.6 to 26.4°C Kinematic Viscosity 0.05° Total
45F 30F 74.5 to 79.5°F Kinematic Viscosity 0.1° Total
46C 66C 48.6 to 51.4°C Kinematic Viscosity 0.05° Total
46F 66F 119.5 to 124.5°F Kinematic Viscosity 0.1° Total
47C 35C 58.6 to 61.4°C Kinematic Viscosity 0.05° Total
47F 35F 137.5 to 142.5°F Kinematic Viscosity 0.1° Total
48C 90C 80.6 to 83.4°C Kinematic Viscosity 0.05° Total
48F 90F 177.5 to 182.5°F Kinematic Viscosity 0.1° Total
49C 20 to 70°C Stormer Viscosity 0.2° 65 mm
50F 54 to 101°F Gas Calorimeter 0.1° Total
51F 69 to 116°F Gas Calorimeter 0.1° Total
52C -10 to 5°C Butadine Boiling Point 0.1° Total
54C 18C 20 to 100.6°C Congealing Point 0.2° Total
54F 18F 68 to 213°F Congealing Point 0.5° Total
56C 19 to 35°C Bomb Calorimeter 0.02° Total
56F 66 to 95°F Bomb Calorimeter 0.05° Total
57C -20 to 50°C Tag Closed Tester 0.5° 57 mm
57F -4 to 122°F Tag Closed Tester 57 mm
58C -34 to 49°C Tank Gauging – Refill 0.5° Total
58F -30 to 120°F Tank Gauging – Refill Total
59C -18 to 82°C Tank Gauging – Refill 0.5° Total
59F 0 to 180°F Tank Gauging – Refill Total
60C 77 to 260°C Tank Gauging – Refill Total
60F 170 to 500°F Tank Gauging – Refill Total
61C 63C 32 to 127°C Petrolatum Melting Point 0.2° 79 mm
61F 90 to 260°F Petrolatum Melting Point 0.5° 79 mm
62C -38 to 2°C Precision 0.1° Total
62F -36 to 35°F Precision 0.2° Total
63C -8 to 32°C Precision 0.1° Total
63F 18 to 89°F Precision 0.2° Total
64C 25 to 55°C Precision 0.1° Total
64F 77 to 131°F Precision 0.2° Total
65C 50 to 80°C Precision 0.1° Total
65F 122 to 176°F Precision 0.2° Total
66C 75 to 105°C Precision 0.1° Total
66F 167 to 221°F Precision 0.2° Total
67C 95 to 155°C Precision 0.2° Total
67F 203 to 311°F Precision 0.5° Total
68C 145 to 205°C Precision 0.2° Total
68F 293 to 401°F Precision 0.5° Total
69C 195 to 305°C Precision 0.5° Total
69F 383 to 581°F Precision Total
70C 295 to 405°C Precision 0.5° Total
70F 563 to 761°F Precision Total
71C 72C -37 to 21°C Oil In Wax 0.5° 76 mm
71F 72F -35 to 70°F Oil In Wax 76 mm
72C 67C -19.4 to -16.6°C Kinematic Viscosity 0.05° Total
72F 67F -2.5 to 2.5°F Kinematic Viscosity 0.1° Total
73C 68C -41.4 to -38.6°C Kinematic Viscosity 0.05° Total
73F 68F -42.5 to -37.5°F Kinematic Viscosity 0.1° Total
74C 69C -55.4 to -52.6°C Kinematic Viscosity 0.05° Total
74F 69F -67.5 to -62.5°F Kinematic Viscosity 0.1° Total
75F -35 to 35°F Coolant Freezing Point 0.5° 100 mm
76F -65 to 5°F Coolant Freezing Point 0.5° 100 mm
77F 245 to 265°F Saybolt Viscosity 0.5° Total
78F 295 to 315°F Saybolt Viscosity 0.5° Total
79F 345 to 365°F Saybolt Viscosity 0.5° Total
80F 395 to 415°F Saybolt Viscosity 0.5° Total
81F 445 to 465°F Saybolt Viscosity 0.5° Total
82C -15 to 105°C Fuel Rating 30 mm
82F 0 to 220°F Fuel Rating 30 mm
83C 15 to 70°C Fuel Rating 40 mm
83F 60 to 160°F Fuel Rating 40 mm
84C 25 to 80°C Fuel Rating 249 mm
84F 75 to 175°F Fuel Rating 249 mm
85C 40 to 150°C Fuel Rating 181 mm
85F 100 to 300°F Fuel Rating 181 mm
86C 95 to 175°C Fuel Rating 35 mm
86F 200 to 350°F Fuel Rating 35 mm
87C 150 to 205°C Fuel Rating 40 mm
87F 300 to 400°F Fuel Rating 40 mm
88C 10 to 200°C Vegetable Oil Flash 57 mm
88F 50 to 392°F Vegetable Oil Flash 57 mm
89C -20 to 10°C Solidification Point 0.1° 76 mm
90C 0 to 30°C Solidification Point 0.1° 76 mm
91C 20 to 50°C Solidification Point 0.1° 76 mm
92C 40 to 70°C Solidification Point 0.1° 76 mm
93C 60 to 90°C Solidification Point 0.1° 76 mm
94C 80 to 110°C Solidification Point 0.1° 76 mm
95C 100 to 130°C Solidification Point 0.1° 76 mm
96C 120 to 150°C Solidification Point 0.1° 76 mm
97C -18 to 49°C Tank Gauging – Refill 0.5° Total
97F 0 to 120°F Tank Gauging – Refill Total
98C 16 to 82°C Tank Gauging – Refill 0.5° Total
98F 60 to 180°F Tank Gauging – Refill Total
99C -50 to 5°C Weathering Test 0.2° 35 mm
99F -58 to 41°F Weathering Test 0.5° 35 mm
100C 145 to 205°C Solidification Point 0.2° 76 mm
101C 195 to 305°C Solidification Point 0.5° 76 mm
102C 83C 123 to 177°C Solvents Distillation 0.2° 100 mm
103C 84C 148 to 202°C Solvents Distillation 0.2° 100 mm
104C 85C 173 to 227°C Solvents Distillation 0.2° 100 mm
105C 86C 198 to 252°C Solvents Distillation 0.2° 100 mm
106C 87C 223 to 277°C Solvents Distillation 0.2° 100 mm
107C 88C 248 to 302°C Solvents Distillation 0.2° 100 mm
108F 270 to 290°F Saybolt Viscosity 0.5° Total
109F 320 to 340°F Saybolt Viscosity 0.5° Total
110C 93C 133.6 to 136.4°C Kinematic Viscosity 0.05° Total
110F 272.5 to 277.5°F Kinematic Viscosity 0.1° Total
111C 170 to 250°C Tar Acid Distillation 0.2° 100 mm
112C 4 to 6°C Solidification Point Of Benzene 0.02° Total
113C 89C -1 to 175°C Bituminous Materials Softening Point 0.5° Total
113F 89F 30 to 350°F Bituminous Materials Softening Point Total
114C 14C -80 to 20°C Aviation Fuels Freezing Point 0.5° Total
116C 18.9 to 25.1°C Bomb Calorimeter 0.01° Total
117C 23.9 to 30.1°C Bomb Calorimeter 0.01° Total
118C 28.6 to 31.4°C Kinematic Viscosity 0.05° Total
118F 83.5 to 88.5°C Kinematic Viscosity 0.1° Total
119C -35.5 to -30°C Coolant Freezing Point 0.05° Total
119F -37 to -22°F Coolant Freezing Point 0.1° Total
120C 92C 38.6 to 41.4°C Kinematic Viscosity 0.05° Total
121C 32C 98.6 to 101.4°C Kinematic Viscosity 0.05° Total
122C 94C -45 to -35°C Brookfield Viscosity 0.1° Total
123C 95C -35 to -25°C Brookfield Viscosity 0.1° Total
124C 96C -25 to -15°C Brookfield Viscosity 0.1° Total
125C 97C -15 to -5°C Brookfield Viscosity 0.1° Total
126C 71C -27.4 to -24.6°C Kinematic Viscosity 0.05° Total
126F 71F -17.5 to -12.5°F Kinematic Viscosity 0.1° Total
127C 99C -21.4 to -18.6°C Kinematic Viscosity 0.05° Total
128C 33C -1.4 to 1.4°C Kinematic Viscosity 0.05° Total
128F 33F 29.5 to 34.5°F Kinematic Viscosity 0.1° Total
129C 36C 91.6 to 94.4°C Kinematic Viscosity 0.05° Total
129F 36F 197.5 to 202.5°F Kinematic Viscosity 0.1° Total
130C -7 to 110°C Tank Gauging – Refill 0.5° Total
130F 20 to 220°F Tank Gauging – Refill Total
132C 148.6 to 151.4°C Kinematic Viscosity 0.05° Total
133C -38 to 2°C Partial Immersion 0.1° 76 mm
134C 144 to 156°C Sludge 0.2° 100 mm
135C 38 to 93°C Fuel Rating 40 mm
135F 100 to 200°F Fuel Rating 40 mm
136C -20 to 60°C Aviation Fuel Density 0.2° Total
136F -5 to 140°C Aviation Fuel Density 0.5° Total
137C 80 to 100°C Oxidation Cell Test 0.1° 76 mm