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Pyrex® cloud and pour point jar, graduated O.D. × H 35 mm × 121 mm
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For ASTM D-97, D-1500, D-2500
Specifications:
| Application | Petroleum & Fuel Testing |
| Storage Temperature | Ambient |
| Product Type | Laboratory Glassware |
| Product Brand | Corning |
| Product Grade | Analytical grade |
The Pyrex® Cloud and Pour Point Jar is a specialized borosilicate glass vessel used in petroleum testing laboratories to determine the cloud point and pour point of lubricating oils, diesel fuels, and other petroleum-based products. These tests are essential in assessing a fuel's performance at low temperatures.
Manufactured from high-quality Pyrex® borosilicate glass, the jar offers excellent chemical resistance, thermal durability, and optical clarity for precise temperature measurements. A single etched line positioned 51 mm above the base provides a consistent fill reference point in accordance with ASTM testing standards.
Key Features & Benefits
✅ Pyrex® Borosilicate Glass Construction
- Exceptional resistance to thermal shock
- Chemically inert to petroleum oils and solvents
- Durable and reusable in laboratory environments
✅ Standardized Dimensions
- Sized to meet requirements of ASTM D97, D1500, and D2500
- Outer Diameter: 35 mm, Height: 121 mm
- Ensures compatibility with cloud and pour point test equipment
✅ Single Graduation Line
- 51 mm reference line from bottom for consistent sample volume
- Simplifies setup and ensures repeatable measurements
✅ High Clarity for Visual Observation
- Transparent glass supports accurate visual inspection of cloud formation or flow cessation
- Ideal for temperature-based evaluations of fluid properties
✅ Safe for Petroleum Testing
- Designed for ambient and chilled temperature conditions
- Not suitable for vacuum use
Applications
| Use Case | Details |
|---|---|
| Cloud Point Testing | Determines the temperature at which wax crystals begin to form in oils |
| Pour Point Testing | Identifies the lowest temperature at which petroleum oil remains pourable |
| Color Testing | Referenced in ASTM D1500 for color comparison using visual methods |
| Petroleum Product Analysis | Used in R&D, QA/QC, and regulatory testing of lubricants and fuels |
| Low Temperature Fluid Evaluation | Assess behavior of oils under refrigeration or arctic conditions |
Technical Specifications
| Property | Details |
|---|---|
| Material | Pyrex® Borosilicate Glass |
| Outer Diameter (O.D.) | 35 mm |
| Height (H) | 121 mm |
| Graduation | 51 mm from bottom (single line) |
| Standards Compliance | ASTM D97, D1500, D2500 |
| Application | Petroleum oil cloud/pour point testing |
| Vacuum Use | Not recommended |
| Reusability | Yes – reusable with proper handling |
| Clarity | High – suitable for visual inspections |
The Pyrex® Cloud and Pour Point Jar is a critical component in petroleum product testing, delivering the dimensional precision and material quality required for compliance with ASTM D97, D1500, and D2500 methods. With its durable borosilicate glass construction, precise 51 mm fill line, and compatibility with standard testing protocols, it provides reliable and repeatable results for professionals working in fuel analysis, quality control, and lubricant research.
This jar is a must-have for labs conducting low-temperature evaluations of fuel and lubricant behavior.