Easy to use: Professional pH tester adopts a user-friendly design and can be easily operated with only 3 buttons (on/off button, TEMP/CAL button and HOLD button). The on/off button is used to turn the device on or off, the TEMP/CAL button is used to switch between temperature units and pH calibration, and the HOLD button is used to lock the data. Professional service: RAINLEOTI high-precision food pH tester is made of high-quality materials, , and ensures long-term reliable performance. You can meet various pH testing needs by replacing the electrode to maximize your cost savings. Before using the pH meter for testing, the instrument needs to be calibrated. You can use the calibration powder we provide for calibration, or you can use the calibration powder/liquid you purchased for calibration. The purpose of calibration is to make subsequent results more accurate. There is no need to repeat the calibration using multiple calibration powders/liquids with different pH values! Note: When performing a pH test, use a clean utensil to take a small sample of food. The sample should be representative of the food to be tested. After the test, discard the sample as it is not edible.Precision Digital pH Tester: The food pH meter provides precise digital display capabilities with a measurement range of 0.00 to 14.00, a resolution of 0.01 pH, and an accuracy of 0.1 pH. It uses advanced chip technology, is equipped with an automatic temperature compensation (ATC) system and a temperature display system, and an LCD backlight screen to accurate measurements in a variety of complex temperature and light environments. Say goodbye to the outdated pH test paper test method and embrace accurate and convenient pH testing. Fermented Food pH Tester: With a spear sensor and glass bead design, you only need to insert the probe into the sample and wait for the value to stabilize for accurate measurement. This food pH tester is suitable for pH testing of fermented foods such as chili sauce, cheese, sushi rice, jam, and sourdough bread, helping to determine the degree of food fermentation and provide a suitable fermentation environment. Solid-state digital pH tester: The pH tester adopts a puncture electrode design, which is capable of measuring the pH of solid or semi-solid samples containing water, and can also be used for conventional solution testing, a two-in-one design. It is suitable for home fermentation and brewing projects such as wine, beer, salad dressing, bread making, as well as testing of meat, cheese and fruit, and is also suitable for soil pH testing of plant cultivation projects and solid culture medium testing in the laboratory. Whether it is a home or professional testing scenario, it is your perfect tool! Color: As Shown Material: plastic Note: Without 3 button batteries Package Contents: 1 x Detector 3 x Calibration kit 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.