In-Line Viscometer 393 Round Flanged Sensor

Handles challenging process applications, like enhanced oil recovery


Cambridge Viscosity’s Model 393 Meets the Requirements of Harsh Platform Applications, Like Enhanced Oil Recovery

Viscosity Range Icon

Viscosity Range: 0.2 to 20,000 centipoise (cP)

Repeatability Icon

Repeatability: 0.5.%

Accuracy Icon

Accuracy: 1.0%

Maximum Temperature Icon

Maximum Temperature: 375°C (707°F)

Pressure Range Icon

Pressure Range: 2,200 psi (151.6 bar)

Wetted Parts Icon

Wetted Parts: 316L or Hastelloy

393 Sensor- Image (HR)

How a Viscometer Sensor Works

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393 Round Flanged Sensor - Ideal for EOR Applications


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%
Repeatability  ± 0.5% of Reading
Temperature Sensor  4 wire internal RTD
Wetted Materials  316L and Hastelloy
Maximum Particle Size  25-360 microns (Range Dependent)
Max Ambient Temperature  375°C (707°F)
Max Operating Pressure  2,200 psi (151.6 bar)
Standard Cable Length  15 feet (4.5 meters)
 Requires ViscoPro electronics

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


• 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


Viscometer Sensor 393 Round Flanged


A Rugged Process Viscometer for Enhanced Oil Recovery Applications

Cambridge Viscosity’s 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 accommodate electrical conduit. The sensor’s self-cleaning feature helps to make it maintenance free in many applications.



  • Accurate & Reliable
  • Easily Installed and Serviced
  • One Moving Part, No Wear Points
  • Low Maintenance
  • Internal Temperature Probe
  • Proven Technology
  • Rugged, Stainless Steel Design
  • Correlates with ASTM D445
  • Mates with 2” ANSI Class



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