The advanced environmental tester stands for precision, user-friendliness, and GLP compliance (Good Laboratory Practice). With a high-resolution LCD display, the environmental tester provides a clear and concise presentation of measurement values. GLP compliance is ensured through automatic data recording and traceable documentation. It allows measurement of pH or redox value and temperature with external sensors. 

A Permanent Measurement Verification (PMV) indicates to the operator, using a color bar, where the measurement value is located within the calibration range, providing insight into whether the measurement is in the correct range.

The graphically guided calibration makes the process simple and user-friendly. User and sample management enable easy navigation and adjustment of measurement parameters on the environmental tester. Sample information can be stored to facilitate the management and identification of measurements. A generous internal data storage saves extensive records without the need for external storage. The USB-C port on the environmental tester ensures fast data transfer and charging. A powerful LiPo battery allows hours of measurements before needing to be recharged. 

Overall, this environmental tester represents a significant step in the development of handheld and laboratory instruments. The high accuracy of ± 0.002 pH + 2 Digits, graphically guided calibration, GLP compliance, user and sample management, and data storage make it an indispensable tool for scientists, researchers, and laboratory technicians relying on precise pH measurements. It not only enhances the accuracy and efficiency of experiments but also streamlines daily work in industry, quality assurance, and the laboratory.