Hanna Instruments pHep4 pH tester and temperature meter HI98127
This advanced pH and temperature tester has been specially developed for laboratory and field use and boasts a robust, waterproof design. Thanks to the large display and intuitive functions, the tester is particularly popular in food analysis, environmental monitoring and water and wastewater technology. In contrast to the [Hanna Instruments Checker pH Tester HI98100], this measuring device is characterized by a replaceable electrode with a unique textile diaphragm that can be easily pulled out when dirty. This special feature saves users costs in the long term, as the tester does not need to be completely replaced, but simply fitted with a new electrode.
Performance features and advantages
Experts consider this tester to be a reliable alternative to conventional desktop devices. It records pH values in the range from -2.0 to 16.0 and automatically compensates for temperature fluctuations. This makes measurements considerably more accurate under changing environmental and sample conditions. A stable measured value is signaled by the integrated hourglass symbol, saving time when reading. Here are some key highlights:
- Waterproof and floatable construction
- Separate display for pH value and temperature
- BEPS function (Battery Error Prevention System) detects low battery voltage
- HOLD function to freeze the measured value
- Practical replacement of the pH electrode for longer operating times
- Automatic switch-off after 8 minutes of non-use
- Stability indicator for reliable results
The compact format (163 x 40 x 26 mm) and a weight of just 100 g make this device easy to transport. At the same time, 4 x 1.5 V batteries provide around 300 hours of runtime. Especially in laboratory situations with frequent calibration, one and two-point calibrations with defined standard buffers avoid inconsistent measured values. Thanks to a pH resolution of 0.1 and an accuracy of ±0.1, even subtle deviations are detected at an early stage, which can be crucial in professional use.
Applications and practical uses
The measuring device is suitable for numerous scenarios where fast and reliable pH determination is required:
- Process monitoring in wastewater technology: For regular monitoring of pH fluctuations and compliance with limit values.
- Quality testing in food processing plants: For the exact determination of acidity, for example in the production of cheese, wine or yogurt.
- Swimming pool and aquarium care: To ensure the correct pH value for healthy water quality.
- Research and development: In the laboratory for pH analysis of samples of various types, e.g. culture media or chemical reactions.
The robust design makes the device particularly suitable for harsh environmental conditions or mobile field service. The tester can also be used comfortably in high humidity.
Certifications and standards
As the device is designed for professional use, it complies with the current industrial requirements and standards for laboratory devices. Hanna Instruments ensures that its pH meters are a good match for ISO quality control in terms of accuracy and long-term stability. In many cases, separate DIN or CE certification is project-related. Users can nevertheless rely on the manufacturer's thorough quality assurance.
Frequently asked questions
How often do you need to calibrate
?
For daily use, it is recommended to calibrate at least once a day with two buffer solutions (e.g. pH 4.01 and pH 7.01). For less frequent use, weekly calibration is sufficient.
What can I do if the electrode gets dirty frequently?
The device has a removable textile diaphragm, which can be uncovered a little if necessary to remove dirt. If the diaphragm is completely used up, the entire HI73127 electrode can be replaced.
Do I need an additional temperature sensor?
No, the integrated thermometer covers a measuring range of -5.0 to 60 °C. This means there is no need for an external temperature sensor.
Which care products are important
In addition to buffer solutions for regular calibrations, a storage solution (HI70300) is recommended for the electrode. This maintains sensitivity for longer and reduces measurement errors.
Conclusion
The Hanna Instruments pHep4 pH tester and temperature meter HI98127 combines modern measurement technology with a durable and practical design. The automatic temperature compensation, simple calibration and replaceable textile diaphragm provide professionals such as laboratory staff, chemists or food technologists with an efficient, cost-conscious solution. This compact device can be used in both stationary and mobile applications and impresses with its high accuracy and fast response time. Thanks to the replaceable electrode, long-term operation is also guaranteed. This makes the measuring device ideal for anyone who needs reliable pH data and wants to benefit from convenient handling at the same time.
