In-Line Viscometer 374 Flow-Thru Sanitary Connection

flow-thru sanitary viscometer

The Model SPL374 is a flow-thru sanitary viscometer that is installed in laboratory and process fluid lines to provide continuous temperature and viscosity tracking. Our technology is based on a simple and reliable electromagnetic concept. Two coils move a piston back and forth magnetically at a constant force. A proprietary circuitry analyzes the piston’s two-way travel time to measure absolute viscosity.

A deflector, positioned over the piston, moves fluid into the measurement chamber. This feature, coupled with the constant piston motion, keeps the sample fresh and mechanically scrubs the chamber. A built-in temperature detector (RTD) senses actual temperature in the measurement chamber.

The Model SPL374 viscometer installs directly into a 1/2” process line using sanitary tubing connections. The sensor requires less than 5mL of sample to accurately determine the viscosity of a solution.

This small sample viscometer also has an integrated heater for tight temperature control. Sample can be measured in flow conditions up to 1 ft/sec.

Measurements can be made in 13 different viscosity ranges within an overall span of 0.2 to 20,000 cP. This sensor allows for readings to also be displayed in cSt.

Key Features:

• Acurate and reliable  • Rugged stainless steel construction • Easily installed and serviced  •Proven technology  • Integrated heater for temperature control • Optional Cooling Jacket •1/2" quick release sanitary fittings •Access port for easy servicing

Complies with ASTM D7483. Correlates with ASTM D445.


small sample sanitary viscometer


Viscosity 0.2 to 20,000 centipoise (cP)
Piston Ranges 0.2-2cP, 0.25-5cP, 0.5-10cP, 1-20cP,
2.5-50cP, 5-100cP, 10-200cP, 25-500cP,
50-1,000cP, 100-2,000cP, 250-5,000cP,
500-10,000cP, 1,000-20,000cP
Viscosity Accuracy ± 1.0% of full scale with VISCOpro 2000
Repeatability ± 0.8% of Reading
Temperature Sensor 4 wire internal Platinum RTD
Wetted Materials 316L and 430 Stainless Steel
Maximum Particle Size 25-360 microns (Range Dependent)
Max Ambient Temperature 212°F (100°C)
Max Operating Pressure 1,000 psi (70.3 bar)
Standard Cable Length 15 feet (4.57 meters)
Power Requires VISCOpro electronics
 Heater  24VDC/60w
 System Volume  <6mL

374 Sensor: In The News