The PLATO MONITOR is an inline measuring system for determining °Plato during production. Depending on the version, the device utilizes the functionality of RHOTEC (density measurement) or SONATEC (sound velocity measurement) . Designed for applications requiring maximum sensitivity and very high accuracy, it offers simple operation and maintenance-free performance .
 European patent application: 1 439 438 B1


 Application
 The PLATO MONITOR is a variant of RHOTEC or SONATEC and enables Plato measurement during the production of:

 
 Beer
 
 Cider



 What does the Plato Monitor measure?

 
 °Plato in process ( inline measurement )

 The °Plato determination is carried out before fermentation.


 Measuring principle – depending on the design
 1) RHOTEC variant (density measurement)

 
 The medium flows through a thin, U-shaped tube in the sensor.
 
 Electromagnets stimulate the tube to vibrate at its resonant frequency .
 
 An internal reference oscillator records the vibration behavior.
 
 Even the smallest changes in density affect the signal and are detected precisely.

 2) SONATEC variant (sound velocity measurement)

 
 A piezoelectric element generates a sound pulse in the ultrasound transmitter .
 
 The pulse travels perpendicular to the product flow towards an ultrasound receiver and is detected there.
 
 The speed of sound is determined from the known distance between transmitter and receiver and the measured travel time .



 Evaluation / product-specific assignment
 The relationship between concentration and density , or speed of sound, can be described by a mathematical polynomial . Centec uses polynomials for a large number of products for this purpose.


 Temperature compensation
 Temperature drifts of the measurement signal are automatically compensated via an internal Pt1000 sensor .


 Your advantages at a glance

 
 Most accurate technology for determining Plato 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



 Technical data
 Measuring range: 0 - 30 °Plato
 RHOTEC accuracy: ± 0.03 °Plato
 SONATEC accuracy: ± 0.07 °Plato
 Measuring temperature range: -3 to +25 °C
 Response time: ≤ 1 s
 Operating pressure: max. 16 bar
 Operating temperature: -25 to +125 °C
 Temperature sensor: Pt1000
 Material: 1.4404/1.4435/AISI 316L; Hastelloy; tantalum; others on request
 Connections: compatible with Varivent© inline housings DN40 - DN150; others available on request
 Input (transmitter version): 6 x digital (24 VDC)
 Output (transmitter version): 3 x digital (24 VDC) & 2 x analog (4 - 20 mA)
 Profibus DP (Transmitter Version): Option
 Profibus DP (sensor without local display): Standard
 Protection rating: IP65
 Power supply: 24 VDC


 contact
 To select the appropriate variant (RHOTEC/SONATEC) and integrate it into your line, please use the contact form below.


 Modular design & extensions
 RHOTEC – Density & Concentration
 SONATEC – Sound & Concentration
 COMBITEC – Concentration analysis (3-component)
 Sensors & Measurement Technology