High Pressure Viscosity Sensors

The high pressure viscosity sensors 440 and 443 are ...

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Cambridge Viscosity


The high pressure viscosity sensors 440 and 443 are used in various applications including PVT oil research, EOR, core analysis, and supercritical fluid research. Fluid flows through a 1/4 inch high pressure port for measurement in which the fluid may be measured under low flow or static conditions. A Cambridge Viscosity system measures viscosity, temperature, and temperature compensated viscosity. It provides data via a RS-232, RS-485 or 4-20 mA signal.

Both viscosity sensors install into a high-pressure, pump-through type system. Both ends mate to HiP HF4 fittings with a 9/16-28 thread. The 440 high pressure viscometer sensor is rated for continuous operation up to 20,000 psi and is static tested to 30,000 psi while the 443 sensor is rated up to 30,000 psi.

Our industry leading viscosity technology is based on a simple and reliable electromagnetic concept, which is utilized in every Cambridge Viscosity sensor. Two coils move the piston back and forth magnetically at a constant force. Proprietary circuitry analyzes the pistons two-way travel time to measure absolute viscosity. A built-in temperature detector (RTD) senses the temperature of the sampling chamber.

Test Methods

ASTM D7483 a ASTM D445

Features and Benefits

  • Minimizes waste
  • Increases productivity
  • Self-cleaning
  • Less than 2ml of sample required
  • Mercury free
  • Measures gas and gas condensates in addition to fluid sample
  • Pressure rated from 20,000 psi with the 440 sensor; can go up to 30,000 psi with 443 sensor
  • Viscosity in cP or cSt ; temperature in C or F
  • 4-20 mA, RS-232 and/or RS-485 data output


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