Professional Portable Yogurt pH Meter
The HI-98164 is a rugged, waterproof, Foodcare portable pH meter that measures pH and temperature using the specialized FC2133 yogurt pH electrode. This professional, waterproof meter complies with IP67 standards. The HI-98164 is supplied with all necessary accessories to perform a pH/temperature measurement packaged into a durable thermoformed carrying case that holds the meters, probes and calibration buffers securely in place.
- Quick Connect DIn Connector
- USB Connection for Data Transfer
- Dedicated Help Button
Monitoring pH is crucial in producing consistent, quality yogurt. Yogurt is made by the fermentation of milk with live bacterial cultures. Most yogurts are inoculated with a starter culture consisting of Lactobacillus bulgaricus and Streptococcus thermophilus. Once the live culture is added, the mixture of milk and bacteria is incubated, allowing for fermentation of lactose to lactic acid. The pH of the mixture drops and becomes more acidic due to the lactic acid production; it is this reduction in pH causes the casein protein in milk to coagulate and precipitate, resulting in a yogurt-like texture.
Yogurt producers cease incubation once a specific pH level is reached. Most producers have a desired point between pH 4.0 and 4.6 in which fermentation is stopped by rapid cooling. Within this range of pH there is an ideal amount of lactic acid present for yogurt, giving it the characteristic tartness, aiding in thickening, and acting as a preservative against undesirable strains of bacteria.
Glass Body
The glass body of the FC2133 is chemically resistant and quick to reach thermal equilibrium, allowing for a faster, more stable response when taking pH measurements in samples that are not at ambient temperature.
Conical Glass Tip
The conical shaped tip design allows for penetration into solids, semi-solids, and emulsions for the direct measurement of pH in samples such as yogurt.
Open Junction Reference
The open junction design consists of a solid gel interface (viscolene) between the sample and internal Ag/AgCl reference. This interface not only prevents silver from entering the sample, but also makes it impermeable to clogging, resulting in a fast response and stable reading.
Built-In Temperature Sensor
Errors in calibration and measurement are eliminated with the Automatic Temperature Compensation provided by the integrated temperature sensor.
Besides being supplied with a unique pH electrode made for yogurt, the HI98164 has the Hanna's unique CAL Check™ feature that alerts the user to potential problems during the calibration process. This is a very important for the food processor since it is likely that the probe will be coated with the solids found in the food product being measured. This coating can easily lead to errors in pH measurement. By comparing previous calibration data to the current calibration, the meter will inform the user, with display prompts, when the probe needs to be cleaned, replaced, or if the pH buffer might be contaminated. After calibration, the overall probe condition is displayed on screen as a percentage from 0 to 100% in increments of 10%. The probe condition is affected by both the offset and slope characteristics of the pH electrode, both of which can be found in the GLP data.
Pressing the “AutoHold” virtual key in measurement mode, the meter will freeze and automatically log a stable reading. An “out of calibration range” warning can be enabled that will alert the user when a reading is not within the bracket of calibrated pH values.
The log-on-demand mode allows the user to record and save up to 200 samples. The logged data, along with the associated GLP data, can then be recalled or transferred to a PC with Hanna’s HI920015 micro USB cable and HI92000 software for traceability in record keeping for specific product batches. GLP data includes date, time, calibration buffers, offset, and slope, and is directly accessible by pressing the dedicated GLP key.
A contextual help menu based on the screen that is currently being viewed can be accessed at any time by the press of a dedicated button.
The high contrast, graphic LCD screen is easy to view outdoors in bright sunlight as well as in low-lit areas with the backlight. A combination of dedicated and virtual keys allows for easy, intuitive meter operation in a choice of languages.
The compact, durable HI720161 carrying case is thermoformed to hold all necessary components for taking a field measurement, including the meter and electrode, beakers, buffer solutions and cleaning solutions.
On-Screen Features
Setup screen
Our extensive setup screen features a host of configurable options such as time, date, temperature units and language for help screens and guides.
Calibration
pH calibration features detailed CAL Check™ messages. Users are guided through the calibration procedure with step-by-step on-screen instructions.
GLP
Comprehensive GLP functions are directly accessible by pressing the GLP key. Calibration data, including: date, time, offset, slope and buffers used in the last calibration can be reviewed.
Features
- Ergonomic, rugged, waterproof (IP67) design
- Supplied with FC2133 Foodcare pH/Temperature electrode
- Five-point pH calibration with seven standard buffers and five custom buffers
- CAL Check
- Log-on-demand
- AutoHold
Specifications
| pH Range |
-2.0 to 20.0 pH; -2.00 to 20.00 pH; -2.000 to 20.000 pH |
| pH Resolution |
0.1 pH; 0.01 pH; 0.001 pH |
| pH Accuracy |
±0.1; ±0.002 pH |
| pH Calibration |
up to five point calibration, seven standard buffers available (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) + five custom buffers |
| pH Input impedence |
10¹² Ohms |
| mV Range |
±2000 mV |
| mV Resolution |
0.1 mV |
| mV Accuracy |
±0.2 mV |
| Temperature Range |
-20.0 to 120.0°C (-4.0 to 248.0°F) |
| Temperature Resolution |
0.1°C (0.1°F) |
| Temperature Accuracy |
±0.4°C (±0.8°F) (excluding probe error) |
| Temperature Compensation |
manual or automatic from -20.0 to 120.0°C (-4.0 to 248.0°F) |
| pH Electrode |
FC2133 Foodcare PVDF body, pH electrode with internal temperature sensor, quick connect DIN connector and 1 m (3.3’ cable) |
| Logging Memory |
200 samples (100 pH and 100 mV range) |
| Connectivity |
opto-isolated USB with optional HI 92000 software and micro USB cable |
| GLP |
Yes |
| Battery Type/Life |
1.5V AA batteries (4) / approximately 200 hours of continuous use without backlight (50 hours with backlight) |
| Environment |
0 to 50°C (32 to 122°F); RH 100% |
| Dimensions |
185 x 93 x 35.2 mm (7.3 x 3.6 x 1.4”) |
| Weight |
400 g (14.2 oz.) |
Product Manual
Brand : Hanna Instruments
