Most viscometer sensors require a large tee or housing to accept their sample volume requirements. This is fine in larger diameter process lines, say 2” and above, but it becomes an engineering hurdle when space is a premium and overall system volumes are limited, such as in dip coating applications for medical devices or optical lenses. There are in-line viscosity solutions available for small diameter process lines and low volume systems.
This week we are going to focus on our model 372 flow-through viscosity sensor. The 372 sensor is FM approved for Class 1, Div. 1, Group C & D, EEx d IIC T2-T6 with ATEX and was recently issued CRN# 0F07232.2 by Alberta Boilers Safety Association (ABSA).
The inlet and outlet connections are ¼” NPT and the internal volume is only 3ml, making it ideal for small volume, recirculating, coating loops. It can measure viscosities lower than 0.2cP and up to 20,000cP (mPas) and is insensitive to flow, vibration, gases or particles. It can also be fitted with a temperature control jacket to minimize variations between process and laboratory QC checks. The calculated uptime is +97% and the recommended calibration interval is +1 year.
Some other interesting specifications:
- All 316L stainless steel construction or other alloys
- Rated up to 5000 PSI (345 bar)
- Repeatability is 0.5% of reading
- Temperature up to 375°C (707°F)
The model 372 viscosity sensor is used with VISCOpro 2100, VISCOpro 2000 and VISCOlab electronics.
There are other small volume viscometers available, but the 372 is the model designed for precision customers producing Daniel Charts for refrigeration, controlling specialty coatings such as scratch resistance, anti-fog, coloring on lenses or lubricity for syringes, catheters or stents.
For more info, contact sales@cambridgeviscosity.com
