The heating treatment to concentrate tomato juice a. Request pdf viscoplastic dam breaks and the bostwick consistometer we present a theoretical and experimental analysis of the dam break of a viscoplastic fluid in a horizontal channel. Consistometer an instrument for measuring consistency. Eth zurich, institute of hydromechanics and water resources management. F 1080, standard test method for determining the consistency of viscous liquids using a consistometer. Please select the items you would like to include by adding them to your enquiry list.
It is used to measure the consistency and flow rate of viscous products, such as jams, dressings, preserves and sauces. Bostwick consistometer, yield stress, viscoplastic fluids, food. Allow the slurry to rest for 30 seconds, trip the release lever of the consistometer and read the bostwick value after exactly 1minute. Csc scientific consistometer, bostwick, model 24925000, each. Consistometers are widely used in evaluating the quality of finished and semifinished food products in the confectionery, canning, meatpacking, fishprocessing, and baking industries and in the production of fats and oils, as well as to monitor the density of bituminous substances, the quality of. Tomato serum was prepared by centrifuging 20 ml of 5brix tomato juice or reconstituted paste for 10 min at 11,000.
Place the consistometer on a level surface and adjust the levelling screws until the bubble in the circular level is centered. The direct or reverse flow styles have respectively positioned reservoirs to calculate the time it takes a specific fluid quantity to flow. The bostwick consistometer is a simple, dependable instrument which determines the consistency of various materials by measuring the distance which a sample flows under its own weight. The unit is constructed of stainless steel and is equipped with two levelling screws and a level. Consistometer requires only 75 ml of sample for measurement.
Stainless steel construction resists corrosion holds up under plant conditions appropriate for laboratory use. This straightforward technology checks samples against consistency, viscosity or flow rate. The bostwick consistometer is a vital piece of quality assurance equipment. Step 1 the bostwick consistometer is designed to sit at a specified angle. Bostwick consistometer viscometer zxcon pce instruments. Place on a steady support and level by means of the leveling screws. Bostwick consistometer to incline or not the laboratory. Modifications of bostwick method to determine tomato. The unit is made from stainless steel which resists corrosion. Designed for conducting quick and accurate bostwick tests of liquids and pastes for compliance with milr81294d and astm f108093, this consistometer features a. The bostwick consistometer is used extensively in the food industry for measuring the consistency, flow rate and viscosity of jams, jellies and other highly.
The bostwick consistometer is one of many instruments designed to make such measurements. Misrepresent an affiliation with any person or organization. Consistometer for accurate and easy flow tests endecotts. The spring loaded gate makes the start of a test instantaneous and precise. Some researches noticed a consistency decreasing during rehydration of tomato concentrates 25. The consistometer provides a single parameter for a variety of flow tests which can be carried out over any period under as near identical conditions as possible. United states department of grading manual for tomato sauce. Designed for conducting quick and accurate bostwick tests of liquids and pastes for compliance with milr81294d and astm f108093, this consistometer features a durable, stainless steel construction. Bostwick consistency was determined using a standard 24 cm bostwick consistometer with 48 x 0. The bostwick consistometer is the preferred choice for measuring consistency, and flow rate in a variety of products. Consistometer 75 ml sample size 240 mm length from davis. Endecotts original bostwick consistometer to measure consistency on any viscous. Paste flow in the trough after 30 seconds is measured in centimeters and is reported as bostwick consistency. Request pdf comparison of two methods to categorize thickened liquids for dysphagia management in a clinical care setting context.
Stainless steel 304 grade bostwick consistometer, grade. The bostwick complies to mill spec r81294d and astm f108093 and is made of stainless steel construction. Modification of bostwick method to determine tomato. The consistometer is manufactured from stainless steel engraved with a series of precise. Meets milr81294b significances and use astm f1080 states the measurement of flow gives results that cannot be predicted with viscosity measurements due to surface tension and density. Comparison of two methods to categorize thickened liquids. The material to be tested should be prepared by holding it at a constant temperature usually 20 degrees c or 68 degrees f for several hours to assure a uniform. The sample is initially retained in a reservoir behind a spring loaded gate prior to testing. Rheological behavior of tomato fiber suspensions produced by high shear and high pressure homogenization and their application in tomato products. Jan 26, 2010 the steps in runnung a csc scientific bostwick consistometer test.
How the bostwick consistometer works the food safety company. The consistometer is a bench top device used for accurately checking laboratory or production samples against consistency, viscosity or flow rate standards. The consistometer must be clean and dry for each determination. The trough must also be at a temperature close to 20 deg.
A longer version of the bostwick consistometer, suitable for testing thinner liquids. Bostwick consistometer to determine the consistency of tomato paste andor tomato puree with a concentration of 12. Bostwick consistometer viscometer zxcon extended pce. It uses little bench space and is yet probably the simplest, most accurate method of conducting a variety of flow associated tests. Consistometers were shipped domestically and to our sister plant in australia. Determines consistency of almost any viscous substance by measuring the distance a material flows under its own weight during a given time intervalcalibrated with clear markings, the capillary viscometers support visual viscosity measurements of liquids.
For some liquids you may need a longer bostwick consistometer to obtain good results. Rotational viscometers putting a new spin on viscosity. The bostwick consistometer is a stainless steel trough with a reservoir and gate at one end. Locate the two twist screws in the rear of the instrument as illustrated in i. To address continually changing raw material properties, the ketchup production process would benefit from 2 specific implementations. Bostwick consistometer and otms were the most valid of them which showed a good correlation with rvalues equal to 0. Learn about what viscosity is from the tomato experts at neil jones food company. In the shallow, slow ap proximation, the fluid flow is controlled by the vertical shear stress and the side walls of the channel play no role. The bostwick consistometer is a simple, dependable instrument which determines sample consistency by measuring the distance which a sample of material flows under its own weight. Consistometer checks against consistency, viscosity, and flow rate standards. Therefore, a study was undertaken to determine how the composition of the prepared pulp exerts its influ ence on the bostwick measurement before and during con centration. Sidetoside level may be adjusted by means of the builtin spirit level. The normal way to use the consistometer is to measure the distance a sample flows in a given time interval. Pour into the reservoir of the bostwick consistometer until it is filled higher than its top level.
Zxcon is a consistometer viscometer used to measure flow rate, viscosity or consistency by bostwick method. Tomato paste is filled into a reservoir and released into trough by opening the gate. The consistometer or bostwick consistometer is manufactured from 316 food grade stainless steel engraved with a series of precise graduations at 0. Jun 27, 20 learn about what viscosity is from the tomato experts at neil jones food company. To clean it after a test, simply wash it out with water. Adjust endtoend level of bostwick consistometer by means of the spirit level placed in trough of instrument. The steps in runnung a csc scientific bostwick consistometer test. Zxcon extended is an extralong consistometer viscometer used to measure flow rate, viscosity or consistency by bostwick method. One chamber is also provided for keeping the liquid in that. The bostwick consistometer and the iddsi flow test. Also, the consistency of tomato puree having a concentration of less than 12.
Bostwick consistometer the bostwick consistometer is the preferred choice for measuring consistency and flow rate in a variety of products. Bostwick consistometers the food industry professionals preferred choice for measuring consistency and flow rate of any viscous product such as dressings, jams, preserves, soups and sauces. You can use the bostwick on any viscous material like sauces, salad dressings, paints, chemicals or cosmetics. The bostwick consistometer remains an integral part of assessing the consistency of tomato products in the factory. Mix sample by gently stirring and pour immediately into reservoir chamber of the consistometer. This apparatus is used to measure the condensity of any liquid. The bostwick consistometer is used all over the world to check the quality of sauces and condiments. Its applications are generally found in the food industry. Available from arrow scientific, the bostwick consistometers are compact benchtop instruments designed to precisely check laboratory or production samples against consistency, viscosity or flow rate standards bostwick can be used on any viscous material, including sauces, salad dressings, paints, chemicals or cosmetics to measure the distance a material flows under its own weight in a. Consistometer definition is a device for measuring consistency or flow characteristics of a viscous or plastic substance as a lubricating grease or a starch suspension. Levelling screws and spirit level enable accurate set up. Viscoplastic dam breaks and the bostwick consistometer.
The consistometer or bostwick consistometer is manufactured from 316 food grade stainless steel engraved with a. While using little bench space, it provides a simple, accurate method of conducting a variety of flow associated tests. Today the specifications are met at levels of 6% to 8% tomato solids by tomato varieties that produce much more viscous pastes. Ideal for predetermining product formulas to standardize production lots. To make this measurement, a sample is removed from the product line and placed into the sample chamber. Flow observed in the bostwick consistometer was evaluated as a gravity cur rent. How to conduct a bostwick consistometer test youtube. Use the bostwick consistometer on any viscous material such as sauces, salad dressings, paints, chemicals or cosmetics, to measure the distance a material flows in a given time interval. The consistency of a sample is measured by its resistance to flow under specific conditions, for a specified time. Consistometer article about consistometer by the free. Comparison of two methods to categorize thickened liquids for. Bostwick consistometer was recommended by mohr for daily analysis of tomato products because of its simplicity and low cost gold, 1983, hayes et al. Consistometer general information the consistometer is a low cost, durable, instrument for accurately checking laboratory or production samples against consistency, viscosity or flow rate standards. In our inhouse training session we do blind product tests and clearly define the differences between brand of ketchup and mustard.
The bostwick consistometer is also used to determine the consistence of baby foods, salad dressings and other tomato products. Nov 11, 2014 the bostwick consistometer is used all over the world to check the quality of sauces and condiments. Bostwick degree and rheological properties applied rheology. The bostwick consistometer is the preferred choice for measuring consistency and flow rate in a variety of products. In terms of standardising the output of such products, the bostwick consistometer is invaluable. Csc bostwick consistometer accurately determines sample consistency. Relationship between inline viscosity and bostwick. Pyrex beaker ii 1 stainless steel kitchen fork iii 1 30oc water bath.
Designed for conducting quick and accurate bostwick tests of thinner liquids and pastes for compliance with milr81294d and astm f108093, this consistometer features a durable, stainless steel construction. Bostwick consistometer ubc math university of british columbia. Both types are always in stock and we ship anywhere in the world. It should not be confused with other types of consistometer, such as those employed in heavy industries for testing the relative thickening times of mud or cement at varying temperatures. This is available in standard length 24cmsand extra long 30cms. The instrument must be adjusted to ensure that it is at this. Consistometer, bostwick consistomter, consistency measurement. Comments about coleparmer consistometer, 75 ml sample size, 240 mm length. This bostwick consistometer is made of stainless steel 304 with a graduation of 24cm at an interval of 0. We manufacture and supply the well known bostwick consistometer to food manufacturers around the world. Consistometer definition of consistometer by merriamwebster. Bostwick consistometer was rec ommended by mohr for daily analysis of tomato products because of its simplicity and low cost gold, 1983. Bostwick consistency was determined with a special extra long 50 cm bostwick consistometer constructed from plexiglass as described marsh et al. Bostwick consistometers now available from arrow scientific.
You can use the bostwick on any viscous material such as sauces, salad dressings, paints, chemicals or cosmetics. Engage in any other conduct that restricts or inhibits anyones use of. The economical, accurate method of checking viscosity. For example, however, the value given by the bostwick consistometer sample collection and preparation. The food industry professionals preferred choice for measuring consistency and flow rate of any viscous product such as dressings, jams, preserves, soups and sauces. Csc bostwick consistometer the bostwick consistometer is built for ease of operation and heavy duty use.
We are a singlesource food, dairy and beverage plant supplier with a diverse product line, so you can find everything you need with just one quick click. The temperature of the product in the consistometer should be as close as practicable to 20 degrees celsius 68 f. Close the gate and hook the trigger release over the top. Transfer sample to the dry sample chamber of the bostwick consistometer. Csc scientific consistometer, bostwick, model 24925000, eachdetermines consistency of almost any viscous substance by measuring the distance a material flows under its own weight during a given time interval. The bostwick consistometer is an instrument designed to make such a measurement. Bostwick consistometer at rs 50000 piece borivali east. Bostwick consistometer was recommended by mohr for daily analysis of tomato products because of its simplicity and low cost 4. Australia received the instrument quickly and without any issues.
This is a testament to the value placed on bostwick consistometer tests by the top food manufacturers. Bostwick consistometer example of data collection sample. The instrument must be adjusted to ensure that it is at this angle. The leveling screws and spirit level insure that the setup is proper. Why choose nelsonjameson as your supply source nelsonjameson can help improve your plant efficiencies and bottom line. The bostwick consistometer is still the preferred choice for measuring consistency, flow rate and viscosity in a variety of products. Trip the release lever of the consistometer and read the bostwick value after exactly 1minute. May 07, 20 the bostwick consistometer is a simple, dependable instrument which determines the consistency of various materials by measuring the distance which a sample flows under its own weight. The consistometer or bostwick consistometer is manufactured from stainless steel engraved with a series of precise graduations at 0.