Description
Milk’s pH must be measured in order to check for contaminants, spoiling, and symptoms of mastitis infection. While there are many factors that can impact the composition of milk, producers can learn more about potential compositional changes by employing pH measurements. A milk processing factory frequently does pH measurements at numerous locations.
The pH level of fresh milk is 6.7. When the milk’s pH value drops below pH 6.7, it usually means that it has been spoiled by bacterial deterioration. Lactic acid bacteria (LAB) from the Lactobacillaceae family are what cause milk’s lactose to break down into lactic acid. Eventually, when the pH of the milk becomes sufficiently acidic, coagulation or curdling will take place, along with the distinctive taste and odor of “sour” milk.
Milk that has a pH value more than 6.7 may have come from cows who have mastitis infections, according to some studies. Mastitis is a constant problem when dairy cows are being milked. Histamine and other substances are released by the cow’s immune system in reaction to infection. As a result, the endothelium and epithelial cell layers become more permeable, allowing blood components to travel through a paracellular channel. Blood plasma has a mild alkaline pH, thus milk will have a higher pH than usual as a result. A pH test provides a rapid technique to screen for infection. Normally, milk producers can do a somatic cell count to diagnose a mastitis infection.
Producers can improve their processing methods by understanding the pH of raw milk. For instance, even little deviations from pH 6.7 can have an impact on the amount of time needed for pasteurization and the stability of the milk following treatment in operations that use Ultra High Temperature (UHT) processing.
The FC1013 amplified pH electrode with PVDF body is used by the HI99162. Numerous characteristics of this customized electrode enhance pH testing for milk producers. Without the use of a separate temperature probe, temperature compensated pH measurements are possible thanks to an inbuilt temperature sensor. A steady calibration and measurement are guaranteed by the contact of the vast surface area of the bulb with the milk sample.
The reference junction is a crucial component of every pH electrode. The electrode’s reference connection facilitates the passage of ions from the reference cell into the sample under test. The completion of an electrical circuit, which ultimately determines the pH value, depends on this flow. Any obstruction at the junction will prevent the circuit from being completed, leading to readings that are unpredictable or constantly drifting.
The FC1013 probe makes use of a secondary reference chamber with a ceramic outer connection, which enables aqueous silver-free electrolyte to pass slowly through the porous ceramic frit and provide precise readings for aqueous samples.
The FC1013’s robust PVDF body ensures that pH measurements can be made safely on the dairy farm or production line. The electrode’s components can also survive a larger temperature range, which improves precision during processes like pasteurization, which calls for heating to temperatures about 72°C (161°F).
PVDF Body
The FC1013’s food-grade PVDF body is sturdy and chemically resistant for precise, portable measurements.
Spheric Glass Tip
The sensor bulb and aqueous milk sample have the best interaction when they are in touch with a big surface area.
Built-In Temperature Sensor
With the Automatic Temperature Compensation offered by the integrated temperature sensor, errors in calibration and measurement are eliminated.
Features at-a-glance
Waterproof – The HI99162 is a waterproof meter rated IP67 for immersion in up to one meter of water for 30 minutes.
Automatic Calibration – One or two-point calibration is automatic to two selectable buffer sets.
Automatic Temperature Compensation – An integrated temperature sensor allows for automatic temperature compensation of pH measurements.
Multi-Level LCD Display – The split-level LCD displays both pH and temperature readings, along with indicators for reading stability, battery percentage, and calibration instructions.
On-Screen Tutorial – Clear tutorial messages and directions are available on-screen to quickly and easily guide users through setup and calibration.
Battery Error Prevention System – The meter will automatically shut off if there isn’t enough power to obtain an accurate measurement.
Battery Life Indicator – The battery percent level is displayed at start up alerting the user to the remaining battery power that is available.
More Information
| SKU |
HI99162 |
| Product Name |
Portable Milk pH Meter – HI99162 |
| Quote Required |
Yes |
| pH Range |
-2.00 to 16.00 pH; -2.0 to 16.0 pH |
| pH Resolution |
0.01 pH; 0.1 pH |
| pH Accuracy |
±0.02 pH; ±0.1 pH |
| pH Calibration |
automatic, at one or two points with two sets of buffers (standard 4.01, 7.01,10.01 or NIST 4.01, 6.86, 9.18) |
| pH Temperature Compensation |
automatic ‐5.0 to 105.0 °C/23.0 to 221.0 °F |
| pH CAL Check (electrode diagnostics) |
probe condition indicator |
| mV Range |
±825 mV (pH‐mV) |
| mV Resolution |
1 mV (pH‐mV) |
| mV Accuracy |
±1 mV (pH‐mV) |
| Temperature Range |
-5.0 to 105.0°C / 23.0 to 221.0°F |
| Temperature Resolution |
0.1°C / 0.1°F |
| Temperature Accuracy |
±0.5°C (up to 60°C); ±1.0°C (outside) / ±1°F (up to 140°F); ±2.0°F (outside) |
| pH Electrode |
FC1013 pre-amplified pH probe with internal temperature sensor, quick connect DIN connector and 1 m (3.3’) cable (included) |
| Automatic Shut-Off |
user selectable |
| Battery Type/Life |
1.5V (3) AAA / approximately 1400 hours of continuous use |
| IP Protection |
IP67 |
| Environment |
0 to 50°C (32 to 122°F); RH max 100% |
| Dimensions |
154 x 63 x 30 mm (6.1 x 2.5 x 1.2”) |
| Weight |
196 g (6.91 oz.) |
| Ordering Information |
HI99162 is supplied with FC1013 pH probe with internal temperature sensor, HI70004 pH 4.01 buffer sachet (20 mL), HI70007 pH 7.01 buffer sachet (20 mL), HI700640 electrode cleaning solution for milk deposits sachets (2 x 20 mL), batteries, calibration certificate for meter and probe, instruction manual, and rugged thermoformed carrying case. |
