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CP-20 Sonic Liquid Concentration Analyzer

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Model CP20 SLA - New Product!


CP20 SLA 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.

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  • Concentration, Dissolved Solids, Wt. %, Vol %, Density, ¡ÆBrix.
  • In-Line Sensor Provides Real Time Analysis.
  • No Scheduled Maintenance Requirements!
  • 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 ¡Æ 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.

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  • Sensor Mounting and Materials

    CP20 Sensor 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 ¡Æ C (660 ¡Æ 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.
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  • 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.

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Application Notes:


SULFURIC ACID OLEUM HYDROCHLORIC ACID
HYDROFLUORIC ACID SODIUM HYDROXIDE NITRIC ACID
FRUIT JUICE CONCENTRATE SODIUM CHLORIDE  


Specifications:
Operational
Display 2 Line by 16 Character
Power 24 VDC, 115 VAC, 230 VAC, 24 VAC Options
Analog Outputs Dual 4 — 20 mA Outputs
Digital I/O RS-232 & RS 485
Relays Three SPDT relays, .1A @ 115VAC, intended for PLC or DCS interface (High, Low and Fault)
Ambient Temp. -20 to 70 ¡Æ C (-5 to 160 ¡Æ F)
Mechanical
Enclosure NEMA 7 Explosion Proof & Water Resistant with window (meets Class 1, Div.2 groups  B, C, D and others)
Weight Varies with sensor style selection, typically less than 25 lbs.
Mounting Standard: 2" 150# ANSI flange.  Other sizes and configurations available
Wetted Materials Standard: 316 Stainless Steel, also available in 304 SS, C20, Hastelloy B & C, Polypropylene, Kynar (PVDF) and other materials.
Performance
Range Sound Velocity: 500 - 3000 meters/sec (any acoustically transparent liquid)
Temperature: -15 to 185 ¡Æ C (5 — 365 ¡Æ F) Standard
Resolution Sound Velocity: ¡¾ 0.01 meters/sec
Temperature: ¡¾ 0.01 ¡Æ C
Repeatability Sound Velocity: ¡¾ 0.10 meter/sec
Temperature: ¡¾ 0.05 ¡Æ C
Response Time 2 Seconds
Accuracy Sound Velocity: ¡¾ 0.20 meter/sec
Temperature: ¡¾ 0.10 ¡Æ C
Concentration: Application Dependent, typical values are ...
Acids and Caustics: ¡¾ 0.05 Wt. %
Salts: ¡¾ 0.1 Wt. %
Organic liquids: ¡¾ 0.1 to 0.2 Wt. %
Oils in water: ¡¾ 0.2 Vol. %
Sugars: ¡¾ 0.1 ¡ÆBrix
Calibration Stability 3+ Years, based on 0.003 mils/year corrosion rate of wetted materials.
Certifications N.I.S.T. traceable certificates available for certain applications.
Setup Factory default, RS232 digital link to PC or laptop.
Software Requires Windows 95, NT or better, 8 Mb RAM preferable.
CP20 Diagram
Note: Specifications are subject to change without notice.
Partial List of Tested Liquids

BINARY AQUEOUS SOLUTIONS AND SLURRIES
Acetaldehyde
Acetic acid
Acetic anhydride
Acetone
Activated carbon slurry
Acrylonitrile butadiene copolymer
Adipic acid
Alkanolamine oleate
Alum
Alumina fines
Alumina hydrate slurry
Aluminum chlorhydrate
Aluminumsulfate
Amines
Ammonia
Ammonium bisulfite
Ammonium carbonate
Ammonium chloride
Ammonium hydroxide
Ammonium molybdenate
Ammonium nitrate
Ammonium persulfate
Ammonium sulfate
Bauxite slurry
Bayer liquor (aluminumprod.)
Bismuth octoate
Black liquor
Boric acid in Sodium sulfate solution
Boric acid
Brine
Butadiene rubberslurry
Butanol
Calcium carbonate
Calcium chloride
Calcium hydroxide
Calcium nitrate
Calcium sulfate
Caprolactam
Chlorine dioxide
Chlorine salts
Citric acid
Clay slurries
Cleaning concentrates
Cobalt acetate
Coolant oil emulsions
Copolymer latices
Copper sulfate
Corn starch
Cupric chloride
Cupriethylene diamine
Cyanides
Defoamers
Detergent solutions
Diammonium phosphate
Dibutyl phthalate
Diethanolamine
Dimethyl formamide
Emulsified rosin
Ethanol
Ethylene dichloride
Ethylene glycol
2-Ethylhexanoic acid
Ferric chloride
Ferrous sulfate in Sulfuric acid
Finish solutions
Flocculant
Fluorosulfonic acid
Fly ash slurry
Formaldehyde
Formic acid
Glycerin
Graphitesolids
Gypsum
Hexamethylenediamine
Hydrochloric acid
Hydrofluoric acid
Hydrogen peroxide
Hydrosulfite
Indigo solids in Caustic
Ion exchange resins
Isophthalic acid
Isopropyl alcohol
Isopropylamine
Latex
Lithium bromide
Lithium hydroxide
Magnesium bisulfite
Magnesium sulfate
Magnesium sulfite
Methanol (Methylalcohol)
Methyl deithanolamine
Methyl ethyl keytone
Methylene chloride
Mica slurry
n-Methyl pyrrolidone
Nitric acid
Nylon finishes
Nylon salt
Oleum
Oil / water emulsions
Ore-leaching solutions
PVCsuspension
Paints
Paper-coating latices
Phenol
Phosphate slurry
Phosphoric acid
Polyglycol / potassium hydroxide
Polymer (floor- wax)emulsion
Polystyrene
Polyvinyl acetate
Polyvinyl alcohol
Potassium - butylphosphate
Potassium carbonate
Potassium chloride
Potassium hydroxide
Potassium permanganate
Propanediol
Propylene glycol
Rayon spin bath liquor
Red liquor
Rolling Oils
Salicylic acid slurry
Saline solutions
Silver nitrate
Sodium bichromate
Sodium borate
Sodium carbonate
Sodium chlorate
Sodium chloride
Sodium formate
Sodium hydroxide
Sodium hypochlorite
Sodium lauryl sulfate
Sodium nitrate
Sodium silicate
Sodium sulfate
Sodium sulfide
Sodium thiocyanate
Sorbic acid
Spent sulfite liquor
Styrene butadiene rubber
Sulfite liquor
Sulfuric acid
Surfactants
t-Butyl alcohol
Taconite slurry
Terathane waste acid
Terephthalic acid slurry
Tetrahydrofuran
Thixotropic pigments
Titanium oxide
Toluene
Urea
Urea formaldehyde resin
Vinyl / butyl acetate
TRINARY AQUEOUS SOLUTIONS
Copper Sulfate / Sulfuric Acid / WaterCupric Chloride / Hydrochloric Acid / Water 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
Palm oil
Pectin
Soft drinks
Sucrose (dilute)
Sucrose syrup
Tea extract
Vegetable oils
Wines

PETROLEUM PRODUCTS / INTERFACE DETECTION
#2 Fuel oil
Alkylation acid
Asphalt
Bunker ¡°C¡±
Coal / fuel oil slurry
Coal / kerosene slurry
Crude oil
Diesel fuel
Standard Low sulfur Fuel Oils
Gasoline
Regular Unleaded
Premium Jet fuel

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Theory of Operation - Sonic Concentration Analyzers

Sonic Concentration Analyzers determine liquid concentration, density, % solids, weight %, volume %, ¡ÆBrix 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

Intrinsic Error of Analysis 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¡Æ C and 60¡Æ 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 ¡¾0.1% acid for concentrations above 80% and below ¡¾0.02% for concentrations above 90%. Figure 2 gives the sound velocity vs. concentration curves at 10¡Æ 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

Sound Velocity/Temperature Coefficient vs. Concentration 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.

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Model 87 Laboratory Analyzer


Model 87 Laboratory Analyzer 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
  • Link: RS-232, 50-19, 200 baud
Compensation Range: 0-100¡Æ C (other ranges available to 400¡Æ C)
Display: Liquid Crystal (LCD) 2-Line x 16 character
Dimensions:
  • Transmitter:
    8.2" (20.8 cm) height
    8.3" (21.1 cm) width
    15.0" (38.1 cm) depth

  • Base:
    11.5" (29.2 cm) width
    16.5" (41.9 cm) depth

  • Transmitter and Base:
    14.8" (37.6 cm) height
    21.8 lbs. (9.9 kg) weight
TRANSDUCERS
Operating Temperature: -40¡Æto 150¡Æ C (-4¡Æ 0 to 302¡Æ  F); option to 400¡Æ  C
Materials: 316 Stainless Steel (standard), Carpenter 20, Hastelloy B &  C, Titanium, Zirconium, KYNAR, high-density polypropylene
Cable length: 8 feet (standard)
Repeatability: Typically +/- 0.005 to +/- 0.1 weight percent
Note: Specifications are subject to change without notice.