ASTM S21C Non-Mercury Thermometer, 79 to 87C, NIST

ASTM S21C Non-Mercury Thermometer, 79 to 87C, NIST

The ASTM S21C Non-Mercury Thermometer is an advanced liquid-in-glass thermometer specifically designed for precise Saybolt Viscosity measurements. Engineered with the same rigorous physical and performance standards as traditional ASTM thermometers, this model offers a safe and environmentally responsible alternative.

It utilizes a proprietary, vibrant blue indicating liquid that is fully biodegradable, non-toxic, and non-hazardous, ensuring safety in laboratory environments. The dark blue liquid stands out clearly against the white-backed stem, providing exceptional readability and minimizing visual fatigue during critical measurements.

Each thermometer comes complete with a NIST Traceable Certificate of Calibration. This certificate confirms a comprehensive five-point calibration performed by an ISO/IEC accredited laboratory. Such accreditation guarantees that all calibration procedures adhere to the highest international standards, conducted within a qualified and controlled environment. Our calibration process involves direct comparison against a Precision Reference Thermometer (PRT) and Standard Platinum Resistance Thermometer (SPRT) in a high-stability liquid bath. Before testing, every thermometer undergoes a meticulous inspection for any structural imperfections, such as cracks or liquid-column separations, ensuring reliability from the outset.

Key Specifications:

• ASTM Number: S21C
• Temperature Range: 79 to 87°C (174.2 to 188.6°F)
• Immersion: Total – designed for full immersion to ensure maximum accuracy in the medium being measured.
• Application: Ideal for Saybolt Viscosity testing, crucial in petroleum and asphalt industries.
• Division: 0.1°C – providing fine resolution for accurate readings.
• Type: Non-Mercury – offering a safer, eco-friendly solution without compromising precision.
• Length: 11 inches (280mm) – a standard length for compatibility with most laboratory setups.
• Accuracy: Calibrated to meet or exceed ASTM E1 specifications for this range, ensuring reliable and repeatable results.
• Environmental Impact: Designed to be a sustainable choice, reducing mercury use in laboratories.

Storage and Care Recommendations: To maintain the integrity of the fluid column and prevent separations, always store Non-Mercury Thermometers vertically using a dedicated storage rack. For enhanced protection and thermal stabilization when used in ovens, baths, or other exposed environments, consider utilizing a Thermometer Well. This accessory shields the glass and helps ensure the most stable temperature readings.

This thermometer is an indispensable tool for professionals requiring high-precision, environmentally conscious temperature measurement for Saybolt Viscosity applications.