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ASTM S21F Non-Mercury Liquid-in-Glass Thermometer, 174 to 188°F, with NIST-Traceable Certificate of Calibration
Experience precise temperature measurements with the ASTM S21F Non-Mercury Thermometer. While its physical and performance characteristics mirror those of standard ASTM thermometers for its intended application, it has not yet undergone the official ASTM review and acceptance process. This thermometer is an excellent, environmentally friendly alternative, utilizing a safe, biodegradable, non-toxic, and non-hazardous blue indicating liquid. The dark blue liquid provides a high-contrast, easily readable measurement against the white-backed stem.
Key Features and Benefits:
- Safe and Eco-Friendly: Uses a non-hazardous, biodegradable blue liquid, making it a safer choice for any laboratory or industrial setting compared to traditional mercury thermometers.
- High Visibility: The vibrant blue indicating fluid against the white-backed glass stem ensures clear and effortless readings, reducing the chance of measurement errors.
- NIST-Traceable Calibration: Each thermometer includes a NIST-Traceable Certificate of Calibration from an ISO/IEC 17025 accredited laboratory. This five-point calibration guarantees that your measurements are accurate and reliable, performed in a controlled environment using high-precision reference standards like Precision Reference Thermometers (PRTs) and Standard Platinum Resistance Thermometers (SPRTs).
- Quality Assurance: Before calibration, every thermometer is meticulously inspected for any physical defects, such as cracks or liquid-column separations, to ensure it meets stringent quality standards.
- Durable Construction: Built for longevity and reliability in professional environments.
Product Specifications:
- ASTM Number: S21F
- Temperature Range: 174 to 188°F
- Divisions: 0.2°F
- Immersion: Total
- Primary Application: Saybolt Viscosity testing
- Type: Non-Mercury, Liquid-in-Glass
- Length: 11in (280mm)
Proper Storage and Use: To maintain the integrity and accuracy of the thermometer and prevent fluid column separation, always store it vertically in a dedicated storage rack when not in use. For applications in ovens or other exposed environments, consider using a Thermometer Well to provide additional protection and enhance thermal stabilization for more consistent readings.
