Description
Specifications Table
Product Name – Viscosity standards (cSt) reads; 210 at 20 °C, 160 at 25 °C, 83 at 37.78 °C, 75 at 40 °C and 50 at 50 °C Viscosity standard
Quantity/Pack Size – 500 ml
Form – Liquid
Grade – Certified Reference Material (CRM)
Application – Viscometer calibration, rheology testing, quality assurance
Product Overview
This premium viscosity standard is engineered for laboratories requiring exacting precision in fluid viscosity measurements. Certified with kinematic viscosity values at critical temperature points—210 cSt at 20°C, 160 cSt at 25°C, 83 cSt at 37.78°C, 75 cSt at 40°C, and 50 cSt at 50°C—this standard ensures traceability to NIST (National Institute of Standards and Technology) for uncompromised accuracy. The fluid is formulated with ultra-stable base oils to resist thermal degradation, oxidation, and evaporation, guaranteeing long-term consistency in calibration procedures. Its low volatility and negligible shear-thinning behavior make it suitable for both capillary and rotational viscometers, including Cannon-Fenske, Ubbelohde, and Brookfield-type instruments. The 500 ml pack size provides an optimal balance between cost efficiency and sufficient volume for repeated calibrations without frequent replenishment. Each batch undergoes rigorous homogeneity and stability testing to eliminate variability, while the tamper-evident packaging preserves integrity during storage and transit. Whether used in pharmaceutical QC labs, petroleum testing facilities, or academic research settings, this viscosity standard delivers repeatable, defensible data for compliance with ISO 9001, ASTM D445, and other global standards. The included Certificate of Analysis (CoA) documents the exact viscosity-temperature relationship, uncertainty values, and expiration date for full regulatory compliance.
FAQs
1. What is the shelf life of this viscosity standard, and how should it be stored?
The standard remains stable for 24 months from the date of manufacture when stored unopened in its original container at temperatures between 15°C to 25°C. Avoid exposure to direct sunlight or freezing conditions, as extreme temperatures can alter viscosity properties. Once opened, use within 6 months for optimal accuracy.
2. Can this standard be used with automated viscometers, or is it limited to manual instruments?
It is fully compatible with both automated and manual viscometers, including those with temperature-controlled baths or Peltier systems. The fluid’s low volatility ensures minimal evaporation during prolonged automated testing cycles, while its Newtonian behavior prevents shear-rate dependencies that could affect readings.
3. How does the temperature coefficient of this standard compare to mineral oil-based alternatives?
This standard exhibits a more predictable temperature-viscosity relationship than generic mineral oil blends, with a coefficient of approximately 0.6% per °C change. The certified values at 5 distinct temperatures (20°C to 50°C) allow for precise interpolation, reducing errors in temperature compensation calculations.
4. Is this standard suitable for calibrating viscometers used in food or pharmaceutical applications?
While the fluid itself is not food-grade, it is chemically inert and non-reactive, making it safe for calibrating instruments that will later test food or pharmaceutical products. However, ensure thorough cleaning of the viscometer with appropriate solvents (e.g., acetone or IPA) post-calibration to avoid cross-contamination.
5. What documentation is provided to verify the standard’s traceability and accuracy?
Each unit includes a Certificate of Analysis (CoA) with batch-specific data: certified viscosity values at all 5 temperatures, expanded uncertainty (±0.35% typical), traceability to NIST SRM 2885, and the expiration date. The CoA also lists the density at 20°C (for dynamic viscosity calculations) and the refractive index for additional verification.
