In-Line Viscometer 393 Round Flanged

round flanged viscometer

The Model SPL393 in-line viscometer sensor provides continuous measurement of temperature and viscosity. The sensor can be used with our VISCOpro electronics to meet any viscosity management application, including harsh Enhanced Oil Recovery (EOR) conditions.

Our patented technology is based on a simple and reliable electromagnetic concept. Two coils pull a piston back and forth within a constantly refreshed sample of process fluid. Proprietary circuitry analyzes the piston’s travel time to measure absolute viscosity. A built in temperature detector (RTD) senses the actual temperature in the measurement chamber.

Measurements can be made in any of the 13 different 20:1 viscosity ranges that are available covering a span of 0.2 to 20,000 cP.

The sensor is designed with a 2” ANSI class 900/1500 RTJ flange and is easily installed in pipelines ranging from 2" and larger in size. Custom Tees are available. The back of the sensor is fitted with a 3/4“-18 NPT fitting to accomodate electrical conduit. The sensor’s self-cleaning feature helps to make it maintenance free in many applications.

Key Features:

• Acurate and reliable  • Rugged stainless steel design  • Easily installed and serviced  • One moving part, no wear points  • Proven technology  • Internal temperature probe  • Mates with 2" ANSI Class 900/1500 RTJ flange

Correlates with ASTM D445, D7483.


• Approved for Class 1, Div. 1, Group C & D
•Approved for Ex d IIC T6 Gb, -20°C<Tamb<40°C
•Approved for Ex d IIC T5 Gb, -20°C<Tamb<60°C
•Approved for Ex d IIC T4 Gb, -20°C<Tamb<95°C
• Approved for Ex d IIC T3 Gb, -20°C<Tamb<160°C
• Approved for Ex d IIC T2 Gb, -20°C<Tamb<190°C
• Approved for Ex d IIC T1 Gb, -20°C<Tamb<375°C



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PowerRequires VISCOpro electronics

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% full scale
Repeatability ± 0.8% of Reading
Temperature Sensor 4 wire internal RTD
Wetted Materials 316L and 430 Stainless Steel
Maximum Particle Size 25-360 microns (Range Dependent)
Max Ambient Temperature 375°F (190°C)
Max Operating Pressure 2,200 psi (151.6 bar)
Power Requires VISCOpro electronics

*+/-5% of full scale 500-10,000 and 1,000-20,000cP ranges

393 Sensor: In The News

New Rugged Viscometer Withstands Harsh EOR Conditions