| ASTM No. | 21F |
| Unit Scale | Fahrenheit |
| Temperature Range (Low) | 174°F |
| Temperature Range (High) | 188°F |
| Liquid Type | Mercury |
| Subdivisions | 0.2 |
| Length | 275 mm |
| Immersion | Total |
| Thermometer Application | Viscosity; Saybolt Viscosity |
| Certification | ISO 17025 Certified |
| Certified Points | 180°F; 187°F |
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