The Alcohol Monitor is an inline alcohol measurement system for determining the alcohol content (ethanol) during ongoing processes. Depending on the model, the system utilizes either RHOTEC (density measurement) or SONATEC (sound velocity measurement). It is designed for applications requiring maximum sensitivity and the highest accuracy.
Application:
The alcohol monitor enables the measurement of alcohol (ethanol) in mixtures of water and ethanol. Alcohol measurement is performed during the production of beer and beer-based mixed drinks.
Measurement principle (depending on the version)
- RHOTEC – Density Measurement:
The product flows through a thin, U-shaped tube inside the sensor. Electromagnets excite the tube to oscillate at its resonant frequency. An internal reference oscillator detects the oscillation behaviour. Even the smallest changes in density affect the signal and are precisely detected.
- SONATEC – Sound Velocity Measurement:
A piezoelectric element in the ultrasonic transmitter generates a sound pulse. This pulse travels perpendicular to the product flow to the ultrasonic receiver, where it is detected. The sound velocity is determined from the known distance and the measured travel time.
Evaluation (Concentration Reference):
The relationship between concentration and density or speed of sound is described by a mathematical polynomial. Centec utilizes decades of experience and its own laboratory facilities for many products.
Temperature compensation:
Temperature drifts of the measurement signal are automatically compensated by an internal Pt1000 sensor.
Highlights
- Most accurate technology for determining alcohol in the manufacturing process
- Patented compact design, local display available (depending on version)
- Hygienic design and full CIP capability
- Easy to use and maintenance-free
- European patent application: 1 439 438 B1
Raymond Karsten
Instek Control (Pty) Ltd
Tel. +27 12 998 6326
info@instek.co.za
www.instek.co.za
