ASTM S18F Non-Mercury Thermometer, 94 to 108F, NIST

Introducing the ASTM S18F Non-Mercury Thermometer: Precision and Safety Combined

For accurate temperature measurements without the hazards of mercury, the ASTM S18F Non-Mercury Thermometer is an indispensable tool. Engineered for precise control and safety, this total immersion thermometer is specifically designed for Saybolt viscosity testing, yet versatile enough for a broad range of other laboratory applications within its specified temperature range.

Key Features and Benefits:

• Expanded Temperature Range & Precision: With a focused measurement range from 94 to 108°F and fine 0.2°F graduations, this thermometer delivers the high resolution critical for demanding tests like Saybolt viscosity. This narrow, precise range ensures optimal accuracy where it matters most.
• Total Immersion Design: Manufactured for total immersion, it provides the most accurate temperature readings by ensuring the entire liquid column is at the temperature of the substance being measured, eliminating errors due to emergent stem effects.
• Safe, Non-Toxic Indicating Fluid: This thermometer utilizes a proprietary, biodegradable, non-toxic, and non-hazardous blue liquid instead of mercury. This innovative formulation eliminates environmental and health concerns associated with traditional mercury thermometers, making it a responsible and safe choice for any lab. The vibrant dark blue color contrasts sharply with the white-backed stem, ensuring easy and unambiguous readings, even in varied lighting conditions.
• Robust Construction & Durability: Measuring a convenient 11 inches (280mm) in total length, the robust glass construction is built for longevity in demanding laboratory environments.
• ASTM Compliance: Rest assured of its quality and performance, as it proudly meets ASTM E1, E77, and E2251 requirements, confirming its suitability for a variety of standardized test methods.

NIST Traceable Calibration for Unquestionable Accuracy:

Every ASTM S18F thermometer comes complete with a NIST Traceable Certificate of Calibration. This is not just any certificate; it signifies that the calibration has been rigorously performed by an ISO/IEC accredited laboratory. This accreditation is your guarantee of unparalleled accuracy and reliability.

The meticulous calibration process involves:

• Direct Comparison: The glass thermometer is calibrated using direct comparison in a high-stability liquid bath against a certified Precision Reference Thermometer (PRT) and Standard Platinum Resistance Thermometer (SPRT).
• Comprehensive Inspection: Prior to testing, each thermometer undergoes a thorough visual inspection for any cracks or liquid-column separations, ensuring its integrity.
• Five-Point Calibration: Measurements are precisely performed at five critical temperature points across its range, providing a comprehensive and verified calibration curve.

Application & Care:

Primarily specified for Saybolt Viscosity testing, this thermometer is also ideal for any application requiring high-precision temperature monitoring within its range where mercury-free solutions are preferred.

Crucial Storage Tip: To prevent fluid column separation and maintain optimal performance, always store non-mercury thermometers vertically, ideally within a dedicated storage rack. For enhanced protection and thermal stabilization when used in ovens or other exposed environments, consider utilizing a thermometer well.

Technical Specifications:

• ASTM Number: S18F
• Temperature Range: 94 to 108°F
• Immersion: Total
• Application: Saybolt Viscosity
• Division: 0.2°F
• Type: Non-Mercury
• Length: 11 inches (280mm)