ASTM S66C Non-Mercury Thermometer, 75 to 105C, NIST

ASTM S66C Non-Mercury Thermometer: Precision Measurement with Enhanced Safety

Introducing the ASTM S66C Non-Mercury Thermometer, a high-precision instrument engineered for accurate temperature measurement in sensitive applications. This total immersion thermometer boasts a measurement range of 75 to 105°C with fine 0.1°C graduations, making it ideal for exacting laboratory and industrial procedures where minute temperature variations are critical. Its robust design and total length of 15.7 inches (400mm) ensure reliable performance in diverse environments.

Designed to meet stringent ASTM E1, E77, and E2251 requirements, this non-mercury thermometer offers a safe, environmentally responsible alternative to traditional mercury-filled instruments. It utilizes a proprietary blue indicating fluid that is entirely biodegradable, non-toxic, and non-hazardous, eliminating the risks associated with mercury contamination and disposal. The vivid dark blue fluid stands out clearly against the white-backed stem, providing superior readability and reducing the potential for reading errors. Its suitability for specialized tests, such as Saybolt Viscosity Testing, further underscores its versatility and precision.

Each ASTM S66C Non-Mercury Thermometer includes a NIST Traceable Certificate of Calibration. This essential document verifies that the thermometer has undergone a rigorous five-point calibration process in an ISO/IEC accredited laboratory. This accreditation guarantees that the calibration adheres to the highest industry standards, performed in a controlled environment. Calibration involves direct comparison against a Precision Reference Thermometer (PRT) and Standard Platinum Resistance Thermometer (SPRT) in a high-stability liquid bath. Before calibration, each thermometer is meticulously inspected for any physical defects like cracks or liquid-column separations, ensuring its integrity and accuracy. Measurements are taken at five distinct temperature points across its specified range to confirm consistent performance.

Key Specifications:

• ASTM Number: S66C
• Temperature Range: 75 to 105°C
• Immersion Type: Total Immersion
• Application Focus: Precision Temperature Measurement, including Saybolt Viscosity Testing
• Graduation: 0.1°C
• Thermometer Type: Non-Mercury (Biodegradable, Non-Toxic Blue Fluid)
• Overall Length: 15.7 inches (400mm)
• Calibration: NIST Traceable Certificate of Calibration (5-point, ISO/IEC accredited)
• Fluid Visibility: Dark blue against white-backed stem for enhanced readability

Maintenance and Best Practices: To maintain the integrity of the fluid column and ensure long-term accuracy, always store Non-Mercury Thermometers vertically. Utilizing a dedicated storage rack is highly recommended. For applications in ovens or other exposed settings, a Thermometer Well can provide critical protection and thermal stabilization, prolonging the life and accuracy of your glass laboratory thermometer.