In-line Viscometer 311 Sanitary

Sanitary Viscometer 311

Quick, Tool-less Disconnect for
Process Applications that Require Periodic Cleaning

The Model SPC/L311 is an in-line or tank vessel viscometer that is installed in process fluids to provide continuous temperature and viscosity tracking. Our technology is based on simple and reliable electromagnetic concept. Two coils move the piston back and forth magnetically at a constant force. 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 SPC/L311 has a quick connect disconnect Tri-Clover® flange. Typical systems include a tee, Tri-Clamp® and an application specific gasket.

Measurements can be made in 13 different 20:1 viscosity ranges within an overall span of 0.2 to 20,000 cP or the equivalent cSt. Maximum flow rate over the sensor head is 10ft/sec (3 m/sec).

*NOTE: ALL ATEX SENSORS ARE SPL ONLY (L = hard wired, C = connector).

Key Features:

• Acurate and reliable  • Rugged stainless steel design  • Easily installed and serviced  • One moving part, no wear seals  • Proven technology  • Internal temperature probe • Mates directly to a 2" Tri-Clover® (or equivalent) clamp fitting

Correlates with ASTM D445.


• Approved for Class 1, Div. 1, Group C & D
• Approved for EEx d IIC T2, -20C<Tamb<190C


SPL 311 drawing.png


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 Stainless Steel
Maximum Particle Size 25-360 microns (Range Dependent)
Max Ambient Temperature 375°F (190°C)
Max Operating Pressure 1,000 psi (70.3 bar)
Standard Cable Length 15 feet (4.57 meters)
Power Requires VISCOpro electronics