CENTEC COMBITEC - Liquid Product Analyser

Combitec SD

A Combined Sensor to Accurately Measure
the Density and Concentration of Liquids
in Precision Process Applications

Highly reliable, Easy to clean, Accurate, Long life,
Very low maintenance requirement

Operating Principles:
Density: Electro-Magnetic Oscillation Monitoring
Density Measuring Range: 0 - 3 g/cm3 (Specific Gravity: 0 to 3)
Accuracy: +/- 0.0001 g/cm3, Reproducibility: 0.00001g/cm3

Concentration: Ultrasonic Velocity Measurement.
Sound Measuring Velocity: 400 - 3000 m/s,
Accuracy ± 0.05 m/s, Reproducibility ± 0.01 m/s.

Temperature Compensation: PT1000
Operating Temperature: -25°C - +125°C
Pressure range: max. 16 bar g.

Materials in product contact: 1.4404 (316L) s/steel, Hastelloy C276

Process connections: Varivent© Clamp - DN40 (1.5") - DN150 (6");
DIN, ANSI and others on request
Inputs and Outputs: Various analogue and digital I/O, incl. Profibus
Enclosure rating IP 65. Supply 24V DC,

The Combitec SD is a highly precise means of determining the Density and Sound Velocity of liquids, even under extreme process conditions. The density measurement is achieved through the use of an electromagnetic oscillating “U”-shaped tube. As the process medium flows through the “U”-shaped tube, the oscillation frequency is measured. The oscillation frequency is affected by any changes in density and measured accordingly.
Like density measurements, Sound Velocity is a material and concentration dependent quantity which can be used for determining the concentration of a liquid. The propagation time of a piezo-ceramic generated sound pulse is measured between the prongs of a fork shaped measuring head installed directly in the process. As this propagation time changes, the sound velocity and resulting concentration changes are measured.