Milk analyzers


Milkotester LTD is high-tech Company for production of measuring devices for the dairy industry, under the trade name MASTER. Milkotester produces series of portable ultrasonic milk analyzers for fast analysis of FAT, solids-non- fat (SNF), protein, lactose, added water, freezing point, ph, salts, conductivity, milk sample temperature and density of one of the same sample directly after milking, in milk collecting centers and during processing. Also, Milkotester offers thermostatic devices for antibiotic and inhibitor tests.

What are the advantages of Ultrasonic method?

Ultrasonic technology overcomes some major deficiencies of the Infrared method. Due to the ultrasonic technology:

  1. Milk analyzers measure directly cold milk samples starting from 5°C.
  2. No periodical calibration needed
  3. Milk analyzers‘ accuracy is independent from the milk acidity
  4. Possibility to analyze all types of milk

How and where can I use the milk analyzers MASTER?

Thanks to the milk analyzers Master, the milk analyses passed from the laboratories to the farms, milk collecting centers, and small milk producers. With 12 V power adapters the milk analyses can be moved in milk collecting vehicle.
Possessing high accuracy and measurement speed, minimal power consumption without usage of consumables, milk analyzers Master are attractive for the dairy industry, easy to operate, low cost maintenance and affordable price.
Milk analyzers Master are suitable for usage not only for control in big laboratories. Devices are appropriate for mini dairies to guarantee the important economical parameters as FAT and protein, where the accurate results allow fast corrections of the production for optimal end results. Milk analyzers Master are a solution to analyze the milk composition used in: analysis of milk for payment in order to ensure equitable payment to dairy farmers, milk standardization to improve the quality, control process and economy in the dairies, improving of the milk-giving herd to optimize the practices of feeding and breeding.

What are the advantages of milk analyzers Master when compared to other ultrasonic milk analyzers?

Milk analyzers Master

                 –    Milk sample temperature from 1 to 42°C

–    Ambient temperature range 5 – 35°C

–    Fat Measuring Range 0.01 – 40%

–    Calibration, possible to be done in each laboratory

       Other ultrasonic milk analyzers

–    Milk sample temperature only from15 to 30°C

–    Ambient temperature range only 15 – 30°C

–    Fat measuring range only 0,5 – 10%

–    Can be calibrated only from the producing company

What are the advantages of Milk analyzers Master when compared to the traditional chemical methods?

Characteristics Parameters Value of ownership Measurement

and analysis time


Stability and


Technology, sample handling  and  reagents




FAT, SNF Protein, Lactose, Salts, Freezing point, Added water,

milk temperature Density, ph, conductivity

Low cost per analysis and quick adjustment in production for optimal production economy . Automatic


Approximately 60, 40, 30 sec.

Simple construction no human errors.

For non-skilled users.

Ultrasonic technology. No sample treatment – analysis of cold samples. No reagents




Only FAT Labor and long testing time => delay inproduction adjustment Manual


Over 15 min.

Includes many accessories in testing and human handling.

For skilled laboratory staff

Approved reference method. Chemicals, centrifuging, water bath. Hazardous chemicals – e.g. sulfuric acid

In what way milk analyzer Master helps preventing the most frequent falsifications in milk?

  1. Mixing different types of milk and offering it as more valuable kind.
  2. Increasing the volume of the milk – adding whey, water, fat detraction or other liquids.
  3. Adding unusual substances (soda bicarbonate , flour or farina) . The aim of this is to cover the adding of water or to stop turning the milk foxy.

What has to be done in case I need to print out the measurement results?

In order to print out the results connect the milk analyzer to the power supply using cables for 12V delivered in the set.

Connect the printer with the milk analyzer using the RS 232 cable which is also in the set and switch on both devices.

There are three led indicators on the printer. First shows – printer is switched on, second lights if there is an error, which can be removed by restart of the printer and third – indicating the quantity of the printer paper.

After each measurement the printer will automatically print the data.

Why there are variations in the results, when analyzing water (instead of milk)

Example from measurements:
Fat = 0.08%
Fat = 0.03%
Fat = 0.06%

What is the reason?
When analyzing water (instead of milk) results for FAT are close to zero, then Freezing point and Added water are completely wrong , therefore are not shown on the display.
There are variations in the results out of measuring range. We recommend making assessments with real milk samples only.

What is the difference between Master LM2/Master Pro P1 and P2, look the same in appearance?

Main difference between both models is the cleaning system.  LM2 P1 and Master Pro P1 are with one peristaltic pump for measuring system, while LM2 P2 and Master Pro P2 are with two peristaltic pumps – one for the measuring system and another for the cleaning system, allowing P2 to be automatically cleaned without operator intervention.

What is the normal power supply of the milk analyzer?

In normal mode, the analyzer is powered by adapter with 12 V output. If the device is powered from another source, such as car battery must be ensured correct power supply of the switching adapter. If any doubts about the proper operation of the device please, check the power supply with multimeter.

The analyzer is switched on, but there is no information on display. How I can check the condition of the working of the various modules?

There are several possible reasons if there is no information on the display after the analyzer is switched on:

  1. There is no available power supply(can be checked without opening of the milk analyzer box)
  2. Broken LCD module or no connection with the Main PCB. In this case: please check the cables and the connectors between LCD and Main PCB and adjusting the coupling between them. This procedure is performed with the power off and open box of the device.
  3. Broken Main PCB module. After you turn on the power at normal condition the Main PCB starts the pump in order to drain any sample residues. Note that this happens (you should here the noise of the running pump). Possible reason for that can be a problem of the Main PCB or peristaltic pump. This can be checked without opening of the milk analyzer box. If this step is successfully completed, further information about the condition of the analyzer is the beep that sounds. If the analyzer beeps it means that the Main PCB works and then you must check the connections with the LCD module.
  4. If there is no any sound, then you must open the analyzer and to turn it on. Check the both LED indicators if some of them lights continuously for more than 2-3 seconds without changing of the light intensity, switch off the analyzer immediately  and send it to the nearest available service center. If the tests are successful and device still doesn’t work the damage is in the LCD module.

What kind of information should I send in the case of a potential problem with the analyzer?

In order to receive quick reply from the service center you must send the following information:

  1. Contact person/company name where you have bought the device from. How long have you used the device?
  2. Please mention the model of the device.
  3. Serial number.
  4. When did you buy the analyzer?
  5. How long the device worked properly?
  6. Did you calibrate the device or it works with factory calibration?
  7. Did you make correction or repairing of the analyzer?
  8. Please, describe the problem of the analyzer in detail. If we have not got detailed information, will be difficult for us to assist you quickly.
  9. Description of the problem. Please describe when and how the problem appeared:
    1. Immediately after delivery e.g. the problem appeared after you switch the device on for the first time
    2. The analyzer worked properly for a certain time (please, mention the period) and after that the problem appeared
    3. Please mention your options regarding the status of the individual modules in case of the described above indications.

We have problem when we connect the milk analyzer Master to the PC – what is the reason?

During the producing process the connection between Milk analyzer Master and PC is mandatory, e.g. operating with the analyzer is not possible without working USB 2.0 connection. Possible causes of communication problems are as follows:

  1. Cable used for connection is different from the mentioned cable in the Operation manual. The operator must use the original cable, supplied from the company producer. The cable must be connected to the port marked as “PC” at the rear side of the milk analyzer.
  2. The other permanent program is available (or virus) that blocks the connection. Please ask your system administrator for assistance.
  3. It is recommended to connect the USB cable to the milk analyzer before switching the device on. This avoids interruptions in the connection.

The analyzer doesn’t work. On the display appears following message:

Error 10  or  Empty Sensor


Possible reason and removal of the problem:

The sucked milk quantity is insufficient or there is air in the sample – please, check for air bubbles in the sample. Please check whether the milk sample reduces in the sample mug – if no, there is problem of  the device suction system.

The sample temperature is high


Possible reason and removal of the problem:

Sucked sample is overheated. Milk sample temperature must be in the maximum permissible range.

The temperature of box is high


Possible reason and removal of the problem:

Milk analyzer temperature exceeded the limits. Enable the option FAST START”(please see the SETTINGS in MENU mode – FAST START )

 Error 11


Possible reason and removal of the problem:

Sensor is damaged – the sensor must be changed. Please, contact Milkotester for assistance.