On-line Sonic Liquid Analyzers. The CP-20 SLA (Sonic Liquid Analyzer) is used to measure the strength, amount or concentration of acids, bases, salt solutions, emulsions, oils in water, alcohols, sugar solutions, non-aqueous liquid mixtures, polymers, and many others. The only absolute requirement is that the liquid be acoustically transparent.
Extreme Calibration Stability, Guaranteed for 3 Years!
Typical Accuracy Better Than 0.10 Weight %!
Factory Calibrated for Easy Installation and Start-up!
Industry Standard Dual 4-20 Outputs and Alarms.
Robust NEMA 7 Enclosure With Display.
Automatic Temperature Compensation.
Internal 8000 Point Data Logger.
All Welded, Seal-less Sensors Available.
Easy Re-configuration and Powerful Diagnostics via Laptop/PC.
For more detailed information see the following:
Selecting an Inferential Analyzer
The Model CP20 can often be used with great benefits in applications historically reserved for other inferential process analyzer technologies such as conductivity meters, densitometers, or refractometers. A conductivity meter is used inferentially when a conductivity of 126 mS is observed for a liquid known to consist of common salt, and is at a temperature of 20 ° C and therefore a salt concentration of 10 percent by weight is inferred because 126 mS is the published value for 10 Wt. % common salt. Similarly, we have NuSonics Div. has a database of values of sound velocity for hundreds of chemicals and liquids which is used to calibrate the CP20 to provide the analysis value.
Inferential analyzers work best either in binary liquids or in liquids in which only one ingredient is changing.
Sensor Mounting and Materials
An assortment of sensors are available for use with the CP20. These include tri-clover or flange mount insertion sensors, inline spool pieces or filler flange wafer sensors, and low volume small line flow through sensors. These sensors are available in a variety of materials including 316 or 304L stainless steel, Hastelloy B, C, Alloy 20, PVDF (Kynar), and polypropylene. Certain sensors are suitable for CIP or no-metal-contact processes. Options are available for sensors operational to 350 ° C (660 ° F), 2000 PSIG, and the harshest of chemical environments. The Model CP20 is preferably attached directly to the sensor, but may be separated from the sensor by use of interconnecting cables installed in conduit. In most cases, the CP20 can be used with existing NuSonics sensors.
What's New in the Model CP20
The Model CP20 takes advantage of the recent development of low cost, high speed digital signal processors. Previous versions of Sonic Liquid Analyzers transmitted a single pulse of sound, and a timing circuit measured its transit time. The frequency of the transmitted sound was determined by the physical dimensions of the transmitting acoustic crystal. The model CP20 uses a novel continuous pulse approach. The transmitting crystal is excited by a sine wave signal, and the received sine wave is digitized. The excitation sine wave frequency can be easily varied. Continuous excitation of the crystal results in higher decibel levels transmitted. By automatically varying the frequency, chemicals or liquids which absorb sound at some specific frequency or processes can now be successfully measured.
The Model CP20 also takes advantage of the common availability of laptop and personal computers. These devices can function as a high quality user-friendly interface utilizing a powerful factory provided software package. The software contains easy to use procedures for checking the calibration and printing reports to meet the documentation needs of many certification programs. The Model CP20 also incorporates an 8000 point data logger. The software allows many forms of manipulating this data, from graphing it to using it for calibration adjustment or new application setup.
Hydrocarbons / Sulfuric Acid / Water (Alkylation Acid) / Potassium Hydroxide / Potassium / Fluoride / Water
NON-AQUEOUS SOLUTIONS AND SLURRIES
Acetic anhydride in Acetic acid Acrylic acid in Monomer Acrylic latexes Acrylic polymer in Toluene / butanol Alkyd resin Ammonia in Nitroaniline Aniline Antimony trioxide slurry in Ethylene glycol Carbon tetrachloride Cellulose acetate in Acetic acid Cellulose acetate in Acetone Cephalosporin in Methylene chloride Cephalothin slurry in Alcohol Coal tar pitch Coal / mineral oil slurry Coke tar Copolymer in Hexane Creosote Cyclohexanone in Cyclohexane Diatomaceous earth in Heptane
Diethylhexyl phthalate in Adipate polyester Epoxy polymer in Organic solvent Epoxy resins Ethanol in Caustic Ethylene glycol in Terephthalic acid Ethylene oxide Ethylenediamine in Toluene Film developer Formamine Freon in Oil Homopolymer in Hexane Homopolymer/copolymer in Iso-octane Methanol in Methyl acetate Methyl methacrylate in Ethyl acrylate Modacrylic polymer in Dimethyl formamide NORDEL in Hexane Oleum Organic peroxides
Orthene in Methylene chloride p,p-Bisphenol A in Phenol Phenolic resin Polycarbonate in Methylene-chloride Polyester resin in Monomer Polyester resin solids in Styrene Polyethylene Polymers in: Xylene Toluene Alpha-methylstryrene Ethyl acrylate Iso-octane Cyclohexane Polymer solids in Hexane Polymerization rate, M.W. Polyolefin lubricants Polyphenylene oxide in Toluene Polysiloxane rubber Polystyrene in Styrene Polystyrene solids in Polyglycol
Polysulfide Polyurethane in Tetrahydrofuran Polyvinyl acetate in Methanol Polyvinyl chloride Resin in Toluene Resin in Toluene / Heptane Rubber in: Methylene chloride Xylene Styrene Saran Silicone oils Silicone polymers Siloxane rubber Soybean oil in Hexane Soybean oil hydrogenation Spin bath liquor Styrene in Ethylbenzene Succinic acid in Succinic anhydride Sulfur chloride in Sulfur dichloride Sulfur Trioxide in Fluosulfonic acid Terephthalic acid
FOOD PRODUCTS
Apple juice / Concentrate Beer (wort plato) Beet sugar Butter Caffeine Catsup Cheese slurry Coffee extract
Cooking oils Corn starch slurry Corn syrup Fructose Fruit juice concentrate Gelatine Glucose Glucose monohydrate
Grape juice / Concentrate Ice cream Jelly Liquid protein Margarine oils Milk products Molasses Orange juice
Theory of Operation - Sonic Concentration Analyzers
Sonic Concentration Analyzers determine liquid concentration, density, % solids, weight %, volume %, °Brix and others by measuring sound velocity. The sound velocity of any liquid or mixture is a repeatable and measurable physical property. The relationship between sound velocity, liquid composition and temperature is different for every liquid. Once the relationship between sound velocity and the desired variable is known, sound velocity can be used to accurately monitor changes in liquid composition. The results of this measurement are often the only means to obtain real time high accuracy concentration or density output. The precision of our concentration analyzers make them an excellent choice for process and laboratory measurement.
Instrument
Measurement of sulfuric acid concentration using the Sonic Concentration Monitor.
Industries
Fertilizers, chemical manufacture, petroleum refining, rayon, sulfuric acid manufacture.
Introduction
The conversion of sulfur dioxide gas to sulfuric acid has increased in recent years due to the enforcement of stringent anti-pollution laws. The supply increase has resulted in a profit squeeze, meaning that producers of sulfuric acid must incorporate all possible cost reduction techniques into the manufacturing process. The Sonic Concentration Monitor, which uses the velocity of sound as the measured parameter, aids in highly accurate automated manufacturing, greatly reducing production costs by keeping operating points at their optimum values. Savings are illustrated under the heading PAYBACK.
Test Conditions
Sulfuric acid is produced chiefly in concentrations of 93% to 98%. Consequently, reagent grade sulfuric acid in concentrations from 77% to 100% by weight have been tested for sound velocity at temperatures between 20° C and 60° C and at ambient pressure.
Results
Figure 1 shows the average intrinsic error of analysis when using the Sonic Concentration Monitor. The error is below ±0.1% acid for concentrations above 80% and below ±0.02% for concentrations above 90%. Figure 2 gives the sound velocity vs. concentration curves at 10° C intervals. Note that the curves are the same shape with the slope increasing with concentration. Figure 3 is a graph of the temperature coefficient as a function of concentration.
The coefficient and reference process temperature are entered as a polynomial into NuSonics' Models 86 or 88 process monitor in order to temperature-correct the concentration reading when the process temperature departs from the reference point.
Discussion
The intrinsic error of any instrument used to measure concentration is inversely proportional to the slope of the measured variable vs. concentration. The density curve flattens out above 95%, and the conductivity curve flattens below 94%. Consequently the errors of analysis of densitometers and conductivity sensors are large in these respective regions and it is in these regions that the Sonic Concentration Monitor offers greatest benefit. Figure 2 clearly illustrates that the sound velocity curve has a steep slope throughout the range of concentrations provided by industry, resulting in the remarkable accuracies displayed in Figure 1. The Sonic Concentration Monitor is also more accurate than refractometers and not subject to fouling.
Payback
As an illustration of cost savings due to accurate analysis, consider a plant which substitutes a NuSonics' monitor for another type sensor, thereby (conservatively) improving analysis by 0.4%. On a daily basis a plant producing 770 tons per day at $28 per ton would save:
0.4% x 770 tons / day x $80 / ton = $246 day
At this rate, the plant could easily afford to pay for a monitor within a few months. The increase in profits in subsequent years is obvious dependability mean higher profitability in any plant where the concentration.
Conclusion
The Sonic Concentration Monitor is the most accurate real time output instrument in the 80% to 100% sulfuric acid range. It is the only instrument that can be used over the entire range of commercial concentration with remarkable accuracy. In addition, the Sonic Concentration Monitor has no moving parts and its accuracy is not degraded by fouling as are densitometers, conductivity sensors, and refractometers. Its accuracy and dependability mean higher profitability in any plant where the concentration of H2SO4 must be carefully measured and/or controlled.
Model 87 is a lab adaptation widely accepted process composition analyzer, used in both industry and research for over twenty years. Employing acoustic technology, the Model 87 continuously samples the sound velocity and temperature of a liquid and produces a concentration output based on those measurements.
Displays Concentration in a Variety of Units
Instantaneous Measurement- Faster, Easier, and More Repeatable Than Titration
Up to 0.02% by Weight Accuracy
No Moving Parts and Virtually No Maintenance
Measure Acids, Bases, Organics, Polymers and Many Others
Specifications:
Power Requirements:
115V AC (+/-10%) or 230V AC (+/- 10%) 50 to 60 Hz
Power Consumption:
35 Watts
Output Signal:
Concentration: 4-20 mA into 600 ohms max
Temperature: 4-20 mA into 600 ohms max
Attenuation: 0-10V DC into 10000 ohms
Fault/High/Low Relay: Form C Relay 1.5 A @ 115V AC, 1.0 A @ 230V AC
현재위치 : 
개
Sulfuric acid is produced chiefly in concentrations of 93% to 98%. Consequently, reagent grade sulfuric acid in concentrations from 77% to 100% by weight have been tested for sound velocity at temperatures between 20° C and 60° C and at ambient pressure. 
As an illustration of cost savings due to accurate analysis, consider a plant which substitutes a NuSonics' monitor for another type sensor, thereby (conservatively) improving analysis by 0.4%. On a daily basis a plant producing 770 tons per day at $28 per ton would save:
