RHOSONICS In-line Concentration Analysis With Ultrasound Presented By: Willem Van B. De Jong

RHOSONICS PRODUCTS

ULTRASONIC IN-LINE ANALYSIS MAIN ADVANGTAGES Based on wave propagation (movement of molecules) Independent of conductivity Independent of density Independent of transparency

RHOSONICS: MAIN FEATURES Completely non-destructive No moving parts Absolute measurement (time) In-line Very high accuracy

PULSE-ECHO (REFLECTION) & TRANSMISSION PRINCIPLE

THE RHOSONICS LIQUID ANALYZER The Model 8100 The MCS-1-cell transmission system The MP-130 measuring probe The MP-54 measuring probe

MODEL 8100 – BENCH TOP MODEL

THE FLOW-THROUGH CELL

MP-130-EX REFLECTION PROBE Explosion proof 2” and larger In-line Temp. compensation

8100 WITH MP-54 SENSOR Sanitary CIP-able For Beer & drinks Inline Temp. compensation

MEASUREMENT OF SOUND VELOCITY Principles Block diagram Time measurement Speed calculation Calculation of concentration from c, T

BLOCK DIAGRAM OF MODEL 8100

TIME MEASUREMENT: BY DIGITIZED WAVEFORM ANALYSIS

MAGNIFIED WAVEFORM

SPEED CALCULATION

THE TRANSLATION OF ULTRASOUND Calculation of concentration Sound speed curves of some liquids

CALCULATION OF CONCENTRATION Polynomial for % w/w, density, etc:

APPLIED TO HYDROCARBON LIQUIDS Sound speeds of some hydrocarbons Composition of some C10…C60 samples Sound speed curves of these samples

USED FOR Conversion processes In-line density SOUND SPEEDS OF HYDROCARBONS

CALIBRATION METHOD Gather sound speed data: Sound 25 temperatures Sound 3 to 5 concentrations Calculation of polynomial data (R) Enter data into model 8100 Each set is called a “recipe”

EXAMPLE 2: NITRIC ACID

EXAMPLE 3: SULPHURIC ACID

EXAMPLE 4: ACETIC ACID

EXPECTED RESOLUTION AC. ACID: Change in c per %: 9.2 m/s/% Change in c per ºC: 3.65 m/s/ºC C accuracy: m/s T accuracy: ºC Resulting in resolution of 100 PPM

EXAMPLE 5: AMMONIUM HYDROX.

MAINTENANCE Functional checks Calibration Cell replacement Editing liquid parameters

TYPICAL ADVANTAGES No moving parts No drift In-line Highly accurate

FUNCTIONAL CHECKS Sample check Pure water check (checks both c & T) Calibration of temperature circuit Negligible drift of sound speed circuit

CALIBRATION INSTRUMENT ELECTRONICS Calibration of analog circuits: mA outputs PT100 inputs PROBE PT100 verification with water check

CELL REPLACEMENT NEW CELL - ENTRY OF NEW PARAMETERS: Path length Dead time Temperature offset ADVANTAGES: Sensor is pre-calibrated Independent of liquid

EDITING LIQUID PARAMETERS Liquid name Liquid number Polynomial constants Field calibration factors

RHOSONICS ANALYSIS INSTRUMENTS YOUR PARTNER FOR ULTRASONIC IN-LINE CONCENTRATION ANALYSIS