The ViscoScope System
© Marimex Industries Corp. 2009
The ViscoScope System measures the viscosity of liquids continually and precisely in-line. The measurement system consists of a sensor, transmitter and the transmission cable. Safety barriers are added, if the sensor is being used in a hazardous area.
The sensor does not employ any moving parts and is maintenance free. The viscosity is obtained using the constant amplitude torsional oscillation principle. The power required, to maintain the small amplitude and constant shear rate at the resonance frequency of the sensor, is a measure for the viscosity in mPa·s x gr/cm3 (η x ρ).
Sensor
The sensor can be mounted in any direction into a reactor, tank, pipe or sample cell. To obtain consistent results, the sensor has to be fully inserted into the liquid. Sensors are manufactured for various viscosity and temperature ranges. To bridge areas of no flow, a non-active extension can be employed. Such a non-active extension is an integral part of the sensor construction and placed between the flange and the probe. A PT100 temperature sensor is integrated in the viscosity sensor for measuring the process temperature.
Transmitter
The transmitter drives the sensor. A fast, closed loop PID controller maintains the amplitude at the resonance frequency of the sensor. The transmitter is built to fit the 19“ rack standard. Many housing
configurations are available for it. Standardanalog and serial outputs are available to transmit the results.
Transmission cable / safety barriers
A transmission cable connects the sensor and the transmitter. If the sensor is being mounted in a hazardous area, safety barriers are placed additionally between the transmitter and the sensor. The transmission cable and the safety barriers form part of the calibration. The distance between the transmitter and the sensor can be a maximum of 1,000 meters.
The sensor can be mounted in any direction into a reactor or pipe
