ASTM S19F Non-Mercury Thermometer, 120 to 134F, NIST

ASTM S19F Non-Mercury Thermometer: Precision and Safety for Saybolt Viscosity

Experience precise temperature measurement with the ASTM S19F Non-Mercury Thermometer, meticulously designed for Saybolt Viscosity applications. While mirroring the physical and performance excellence of traditional ASTM thermometers, this model utilizes an advanced, safe blue indicating liquid, making it an environmentally responsible choice. This liquid is biodegradable, non-toxic, and non-hazardous, ensuring both user and environmental safety without compromising accuracy. The dark blue liquid stands out clearly against the thermometer’s white-backed stem, allowing for quick and unambiguous readings.

Key Features & Benefits:

• Mercury-Free Design: Eliminates the hazards associated with mercury, offering a safer alternative for laboratories and industrial settings.
• Clear Visibility: The vibrant blue liquid against a white background ensures excellent readability, minimizing errors in data collection.
• Robust Construction: Manufactured with high-quality glass, this thermometer is built for durability in demanding environments.

Certified Accuracy with NIST Traceability:

Each ASTM S19F thermometer comes equipped with a comprehensive NIST Traceable Certificate of Calibration. This is not just a standard certificate; it confirms that the thermometer has undergone a rigorous five-point calibration process in an ISO/IEC 17025 accredited laboratory. This accreditation is your guarantee that the calibration procedures are performed to the highest international standards, ensuring reliability and compliance.

The calibration process involves direct comparison in a highly stable liquid bath against a Precision Reference Thermometer (PRT) and a Standard Platinum Resistance Thermometer (SPRT), along with their respective displays. Before testing, every thermometer is thoroughly inspected for any manufacturing defects such as cracks or liquid-column separations that could compromise accuracy. Measurements are precisely taken at five critical temperature points across the specified range, providing a thorough validation of its performance.

Technical Specifications:

• ASTM Number: S19F (While not yet officially reviewed by ASTM for this specific application, its characteristics align perfectly with ASTM standards).
• Temperature Range: 120 to 134°F (49 to 57°C) – Ideal for specific Saybolt Viscosity tests.
• Immersion: Total – Designed to be immersed completely in the medium for accurate readings, as required by the Saybolt test method.
• Application: Specifically engineered for Saybolt Viscosity measurements, crucial in determining the flow properties of petroleum products and lubricants.
• Division: 0.2 degrees – Offers fine-grained resolution for precise temperature monitoring.
• Type: Non-Mercury – Safe and environmentally friendly.
• Length: 11 inches (280mm) – Standard length for laboratory applications.

Maintenance and Protection:

To maintain the integrity of the fluid column and ensure long-term accuracy, always store Non-Mercury Thermometers vertically in a dedicated storage rack. This prevents fluid column separation, which can lead to inaccurate readings and potential recalibration needs.

For enhanced protection and thermal stability in challenging environments like ovens or exposed settings, consider using a Thermometer Well. This accessory provides a protective enclosure for the glass thermometer, shielding it from physical damage and minimizing thermal fluctuations during measurements.