The BANTE2 series pH/ORP/Temperature Meters are suitable for on-site measurement of liquid pH, ion potential (mV), oxidation-reduction potential (ORP), and temperature values. This series includes two models: BANTE220 and BANTE221. Two-point button auto-calibration: The BANTE2 series features a two-point button calibration function. During calibration, the instrument automatically prompts the type of standard buffer solution required. Simply follow the prompts, immerse the electrode sensor into the corresponding calibration solution, press the ENTER key, and the instrument will automatically perform the calibration. Automatic recognition of standard buffer solution: If an incorrect or deteriorated standard buffer solution is used during calibration, the instrument will automatically display an error and halt the calibration process. Automatic electrode slope display: After calibration, the instrument automatically displays the electrode slope. You can determine whether to replace the electrode sensor based on the slope value. Automatic power monitoring: The BANTE2 series has a built-in power monitoring chip. When the battery power is low, the battery icon will automatically turn off to prompt you to replace the power source. Automatic temperature compensation and measurement: The instrument features automatic temperature compensation and measurement. When the temperature probe is connected, the BANTE2 series automatically recognizes the temperature sensor and measures the temperature. If a pH electrode is also connected, the instrument will automatically perform temperature compensation. Data hold function: When measuring samples, to easily read the measurement results, you may need to hold the value for a period of time. The data hold function of the BANTE2 series provides convenience. Press the HOLD key to lock the currently displayed value; press again to return to measurement mode. Optional temperature unit: The instrument can be set to display temperature in Celsius or Fahrenheit according to your country's usage habits. Automatic message prompts: The BANTE2 series has an operational message prompt function. When you enter a certain setting or measurement, the message bar helps you understand what operations can be performed and how to operate the instrument in the current state, equivalent to the operating steps in the manual. Guided by the message bar, you can easily complete settings or measurement tasks. Data storage and output: The instrument can store 50 sets of data. During measurement, press the SAVE key to automatically save the current measurement value and mark the data with a serial number, date, time, and other information for future reference. Via a USB data cable, the stored data can be sent to a personal computer, allowing you to save measurement values or print test reports using software. Technical parameters: Model: BANTE220 pH measurement range: -2.00~16.00pH pH measurement accuracy: ±0.01pH mV measurement range: 0~±1999mV mV measurement accuracy: ±1mV Temperature measurement range: 0~100.0°C, 32~212°F Temperature measurement accuracy: ±1°C, ±1.8°F Temperature compensation range: 0~100°C, 32~212°F, automatic or manual Calibration points: 2 Calibration solutions: Chinese version (NIST type, pH4.00/6.86/9.18); International version (USA type, pH4.01/7.00/10.01) Data storage: 50 sets Communication output: USB standard Display: 4.3-inch LCD screen with operation mode icons and prompt messages Power type: 9V/800mA battery, one piece, continuous use for approximately 150 hours Dimensions: 185(L)mm×88(W)mm×32(H)mm Weight: 300g Model: BANTE221 pH measurement range: -2.00~16.00pH pH measurement accuracy: ±0.01pH ORP measurement range: 0~±1999mV ORP measurement accuracy: ±1mV Temperature measurement range: 0~100.0°C, 32~212°F Temperature measurement accuracy: ±1°C, ±1.8°F Temperature compensation range: 0~100°C, 32~212°F, automatic or manual Calibration points: 2 Calibration solutions: Chinese version (NIST type, pH4.00/6.86/9.18); International version (USA type, pH4.01/7.00/10.01) Data storage: 50 sets Communication output: USB standard Display: 4.3-inch LCD screen with operation mode icons and prompt messages Power type: 9V/800mA battery, one piece, continuous use for approximately 150 hours Dimensions: 185(L)mm×88(W)mm×32(H)mm Weight: 300g Standard configuration: pH combination electrode; temperature probe; pH standard buffer reagent; 9V button battery; ORP electrode (only for model 221) Optional configuration: carrying case; pH calibration solution