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The 20 Best Milk Analyzer

Posted on: August 24, 2020, edit by Jason
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What is milk analyzer?
5 types of milk analyzer working principle
Milk testing machine detection
20 Best Milk Analyzers

milk-analyzer
Milk-analyzer

What is milk analyzer?

1. Definition

Milk analyzer is a high-end instrument specially for the dairy industry, mainly used in the quality control and product development of various dairy products (including high-viscosity yogurt). Main inspections: raw milk, fermented yogurt (the instrument itself is equipped with a high-viscosity pump), colorful milk beverages, UHT (ultra-high temperature sterilized milk), pasteurized milk, etc.

2. Scope of application

The milk analyzer can very accurately detect fat, protein, lactose, total solids, non-fat milk solids, free fatty acids, citric acid, density, sucrose, conductivity, acidity, total sugar, urea, casein, Freezing point and other components and detection of freezing point. It can be applied to the detection of raw milk, fermented milk, yogurt, colorful milk, various liquid milk, flavored milk and various milk beverages. It can be used for the research and development of dairy products, the control of semi-finished products in the production process (reducing the cost of raw materials), the quality control of finished products, and the quality of raw milk.

3. Instrument configuration

  1.  Product documents with unlimited sample quantity
  2. Sample detector
  3. Sample stirrer
  4. the data interface connecting of the printer
  5. RS232 data interface connecting to computer or modem
  6. High-viscosity pump system (used for the determination of high-viscosity samples. When measuring high-viscosity samples, no additional cleaning reagents are required. High-viscosity samples that can be tested include cream, ice cream samples before freezing, fermented milk, and yogurt. In addition, even if the sample is added with stabilizers, preservatives, thickeners, etc., it will not affect the test results.)
  7. Automatic cleaning, zero setting, heating system (sample does not need to be preheated)
  8. Spare parts for 1 year
  9. Computer equipped with special software to collect data

4. Test samples

  1. Raw milk
  2. Fermented yogurt (the instrument itself is equipped with a high-viscosity pump)
  3. Color milk
  4. Milk drinks
  5. UHT, pasteurized milk

5. Physical and chemical indicators

Milk test machine can detect fat in raw milk and various dairy products (some analyzers can detect animal fat and non-animal fat), protein, lactose, total solids, non-fat milk solids, free fatty acids, citric acid, density, sucrose, conductivity, acidity, total sugar, urea, casein, freezing point and other components. At the same time, the temperature of the sample can be controlled.

5 types of milk analyzer working principle

1. Chemical Analysis

In the national standard, there are strict regulations on the indicators and testing of milk and other dairy products. The chemical analysis method is the national standard method. The determination of protein in chemical analysis methods often uses the semi-micro Kjeldahl method. The principle of the semi-micro Kjeldahl method is to heat the test sample with sulfuric acid and catalyst to decompose the protein. The decomposed ammonia combines with sulfuric acid to form ammonium sulfate. Then the ammonia is freed by alkalization distillation, and then absorbed by boric acid. Titrate with a standard hydrochloric acid solution and multiply the conversion factor according to the consumption of acid to obtain the protein content. This method requires that the difference between the two parallel determination results of the same sample should not exceed 1.5% of the average value; for lactose, high pressure liquid chromatography and the Rein-Enon method are used, and the difference between the two parallel determination results should not exceed 5% of the average value.

The chemical method is quite mature and can obtain high accuracy, but it takes a long time to get the result and cannot meet the needs of online measurement and analysis.

2. Mid-infrared spectroscopy

The mid-infrared spectroscopy analysis method is relatively mature, and almost impeccable analytical instruments have already come out. The Milk Scan series of rapid milk composition analyzers produced by the Danish FOSS company is one of them. The mid-infrared spectroscopy method uses the absorption of various components in milk to different wavelengths, and completes the determination of milk components by measuring the absorption coefficient and scattering coefficient. FOSS Milk 133 is an early product of FOSS, using interference filter technology, and its prediction accuracy CV value can reach the level of 5%. The FOSS Milk Scan FT120 milk analyzer, using Fourier technology, has a prediction value of 1% for fat, protein and lactose, and a prediction value of 0.8% for non-fat milk solids and total dry matter.

However, the mid-infrared spectrum analyzer is expensive, large in size, and complicated in operation and maintenance, and is not suitable for on-site operation and flow detection.

3. Ultraviolet absorption spectroscopy

The protein content in milk can also be determined by ultraviolet spectroscopy. The principle of determination is that the aromatic ring residues of the protein and its degradation products in the milk can selectively absorb light of a certain wavelength in the ultraviolet region, and within a certain concentration range, light absorption has a linear relationship with the protein concentration, so by measuring the absorbance of the protein solution, the protein content can be measured.

Ultraviolet absorption spectroscopy has the advantages of fastness, simplicity, high sensitivity, and re-linearity. However, because non-protein substances may also cause light absorption in the ultraviolet part, and the interference of light scattering, there is low analysis accuracy.

4. Near infrared spectroscopy

Near-infrared spectroscopy analysis technology uses spectroscopy to analyze the composition and structure of substances. It has the advantages of fast, low cost, no damage to the chemical properties of the sample, and environmental protection. In recent years, it has been used in the field of analysis and testing, especially in the field of online analysis and industrial control. In the fields of agriculture, food industry, petroleum industry, pharmaceutical industry and clinical medicine, near-infrared spectroscopy technology has been successfully applied. The conventional analysis of near-infrared spectroscopy is similar to ultraviolet-visible spectroscopy, which is divided into transmission spectrum and diffuse reflectance spectrum.

In practice, different analysis techniques are used according to different sample properties. The absorption of different components of milk at different wavelengths is often used to establish multiple linear regression models. For example, fat has strong absorption peaks at 1212nm, 1392nm, 1729nm, 1763nm and 2144nm.

In the diffuse reflection test, protein has quite abundant absorption peaks at 1460nm~1570nm, 2050nm~2070nm and 2180nm. In China, some research institutes measured the diffuse reflectance spectrum of milk powder on the model 8620 milk powder analyzer of Pertone, and used 55 high-calcium milk powder samples to establish a model using multiple linear regression algorithms. The correlate coefficient of protein modeling is 0.96 and SEC is 0.196%.

At present, many foreign companies have developed milk powder analyzers based on near-infrared spectroscopy. However, due to the lack of representative models, the measurement accuracy of these products is not satisfactory. This is also a problem that the near-infrared spectroscopy needs to solve.

5. Ultrasonic testing methods

Ultrasonic detection technology uses the interaction between high-frequency waves and substances to obtain the physical and chemical properties of the measured substance. Ultrasound can be divided into longitudinal wave, transverse wave, surface wave and plate wave according to its wave type. In liquids such as milk, there can only be longitudinal waves, while the other three do not exist.

When ultrasonic waves pass through a medium, there are roughly three forms: compression waves, surface waves and shear waves. In the application, compared with the other two forms, the compression wave is the most important, which is the propagation form of the longitudinal wave. The transmission of compression waves in the medium is carried out through the compression and expansion of the medium; but the oscillation of this medium particle with the original position as the origin under the action of the sound wave still obeys Hooke's law, that is, the structure of the medium has no fundamental damage occurred during the transmission of sound waves.

Among the various components of milk, fat and other macromolecular substances have a greater impact on the attenuation of ultrasound, while protein and lactose have a greater impact on the speed of ultrasound. The components in milk can be divided into fat and non-fat milk solids. According to the contribution of the two major components to the ultrasonic attenuation and velocity, a model can be established to measure the percentage of each component, and based on the statistical relationship, the content of other components can be calculated. In this way, the percentages of various ingredients can be obtained. In recent years, great progress has been made in the field of ultrasonic milk composition measurement at home and abroad. The prediction accuracy can reach 5%, which can basically meet the requirements of online measurement and flow detection.

Ultrasonic measurement methods have many advantages over the optical methods mentioned above. The ultrasonic method has low requirements for the measurement environment, so the ultrasonic analyzer is very suitable for flow detection. Compared with optical devices, the ultrasonic probe has a lower price, which makes the cost of the ultrasonic milk composition analyzer lower, which is very suitable for small users. Coupled with the small amount of sample required for analysis, the instrument can be made small in volume and suitable for portable use.

Note: This article takes the ultrasonic milk detector as the main object of description.

Milk testing machine detection

1. Standard inspection items: range accuracy (positive and negative) 

  1. Fat: 0.01% -25% (option 45 %), 0.1%
  2. Non-fat milk solids: 3% -45%, 0.15%
  3. Density: 1015–1160 kg/m3, 0.3 kg/m3
  4. Protein: 2% -28%, 0.15%
  5. Lactose: 0.01% -24%, 0.2%
  6. Watering: 0% -70%, 3%
  7. Milk temperature: 1 °C –40 °C, 1 °C
  8. Freezing point: 0.400 –0.700 °C, 0.001 °C
  9. Ash content: 0.4 –1.5%, 0.05%
  10. PH: 0-14
  11. Conductivity: 2-12mS/cm

2. Performance Index

  • Scope of milk analysis
    • Fat              0% ~ 20%
    • Total dry matter    0% ~ 55%
    • Protein           0% ~ 15%
    • Lactose           0% ~ 15%
  • Reproducibility (coefficient of deviation)
    • Fat                      0.01% m/m
    • Protein                  0.01% m/m
    • Lactose                  0.02% m/m
    • Total solid content         0.05% m/m
    • Freezing point             0.001°
  • Accuracy (standard error)
    • Fat                  <0.06% relative to "Rose Gottlieb" method
    • Protein               <0.06% relative to "Kjeldahl" method
    • Lactose               <0.06% relative to high performance liquid chromatography
    • Total solid content      <0.1% relative to gravimetric method
    • Freezing point          0.005°

20 Best Milk Analyzers

France

  1. DairySpec FT by Bentley Instruments
    DairySpec FT is designed for a wide range of dairy laboratories and processing facilities that require high-precision instruments to analyze dairy ingredients, including fat, protein and lactose.

United States

  1. HI98162 by Hanna Instruments
    HI98162 is a rugged, waterproof Foodcare portable pH meter, which can be used to measure pH and temperature with the FC1013 probe dedicated to dairy products. This professional waterproof meter meets the IP67 standard.
  2. Master ECO by Milkotest       $795
    MASTER ECO is a high quality milk analyzer for measurement of the main milk parameters. Correct analysis of the components is carried out for 60sec (40sec/30sec)
  3. AfiLab™ by Afimilk
    AfiLab analysis adds a new dimension to dairy farming. Yielded data is used to optimize feeding, and for following-up and alerting about nutrition disorders.
  4. Ajanta                $1,080
    Simultaneous Fat and SNF Analysis. Simple Easy to Use, Economical. No Acid or other Chemical required. Fast and Accurate. Measurement Time - 40 seconds. Easy to clean - Single cell. Suitable for Cow/Buffalo/Mixed Milk
  5. Contemp              $1,100
    With this Ultrasonic Milk Analyzer, we present a comprehensive solution for you to check the total quality and composition of milk. This testing equipment integrated with advanced technology is widely used in dairy farms for the measurements of essential parameters directly after milking, at collecting as well as during processing.

Switzerland        

  1. LactoScope FTIR from Perten Instruments
    LactoScope FTIR complies with ISO9622/IDF141 and uses AOAC approved methods to analyze fat, protein, lactose and total solids in milk and milk derivatives.

Denmark       

  1. FOSS's BacSomatic™
    Before using raw milk in a convenient instrument with rapid bacteria and somatic cell counts, please understand the hygienic quality of raw milk. Small and convenient instruments for bacterial count and somatic cell count provide a quick alternative to manual detection or semi-automatic methods that require reagent handling.

Japan

  1. Milktest's MILK DOCTOR
    Milk Doctor is a handheld device that can quickly detect antibiotic residues in milk, thereby improving production quality control.

United Kingdom

  1. AMBIC's AMS/200, AMS/300
    The Ambic MilkSampler is an invaluable herd management tool – it is ideal for checking the constituents of milk and somatic cell counts of individual cows or goats.

Poland        

  1. K500-Dairy by POLANES
    The sensor is a subsystem of milking unit KOMPAS 500 with an analysis function of milk volume, protein, fat, lactose measurement and conductivity in real time.

Greece

  1. MILKPLAN
    The Milkplan MP Ηome Cheese Pro family traditional cheese-making line is an integrated cheese-making solution with a cheese production capacity of up to 500 liters.

India

  1. Ekobenny      Rs 38,350
    A well-renowned organization in the industry to provide patrons the best quality array of Ekobenny Milk Analyzer.
  2. Nuline LAB     Rs 35,000
    One of the leading manufacturer and supplier of Nuline LAB Milk Analyser, and one of the best milk analyzer manufactures in India. They obligated to meet the quality standards as per the customer demand.
  3. EKOMILK       Rs 32,000
    A leading Manufacturer of ekomilk milk analyzer and automatic milk collection unit from Ambala, India.
  4. MEI           Rs 48,500
    It is suitable for milk collection centers, cooperative societies, and Dairy Laboratories where there is a big work load, fast and cost effective analysis is needed.

Pakistan

  1. Sharp Corporation
    Milk Analyzer by Sharp Corporation (Dawn Scientific Company), a premier Business to Business marketplace and largest online business directory.

Russia

  1. Sibagropartner           $599
    This analyzer is the most popular among milk quality laboratories. The analyzer combines affordable price, high accuracy and performance. In addition, it is additionally equipped with a built-in pH meter to determine the acidity of the milk.

Turkey

  1. Sinan-Son                 $750
    Milk analyzers - Master Series are high quality instruments up to measure the thirteen components of the milk. Correct analysis of the components is carried out for 60sec (40sec). Built-in keypad for entering data (liters, number of supplier).

China

  1. CXTH
    The pump can work better now by using upgraded pump drive system and electric pulsation suppression technology. The detector also can work with better wavelength precision and stability.

Conclusion

The milk analyzer can easily detect the physical characteristics and composition of various dairy products. The detection methods are different and the results will be not consistent. The milk analyzer price of different models, brands and configurations varies greatly

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