Portable Bench/Table pH & Conductivity Meter P911 P913 P914 — TDS/DO Water Quality Tester (Made in China)

Overview: Professional portable bench/table water-quality meters P911, P913 and P914 with multi-parameter testing for pH, conductivity/TDS/salinity/resistivity and dissolved oxygen. Manufactured in China and suitable for laboratory and field bench use. Display & Power: Large 5-inch LCD screen with a 150° viewing angle provides clear readings readable from up to 5-meter. The unit is powered by a rechargeable battery that lasts up to 30 hours and includes an automatic power-off after 10 minutes of inactivity to conserve energy. Processor & Smart Functions: A built-in microprocessor enables intelligent features such as automatic calibration, ATC, data logging, clock display, USB output, configurable function settings, automatic shutoff and low-voltage alarm. Connectivity & Data: Two USB interfaces support PC connection, battery charging and data transfer. The meter can store up to 300 data sets, each including the measurement, date and time. Electrode Interfaces & Recognition: Simple electrode hookup via a 3.5mm electrode interface. The instrument auto-recognizes different electrode types; electrodes fitted with an onboard chip will automatically store and recall their calibration data when connected to the meter. pH Mode: Automatic identification of 15 buffer solutions. Calibration options include three kinds of standards (Europe & USA, NIST and China) and the instrument supports 1, 2 and 3-point calibration. Conductivity Mode: Uses advanced conductivity measurement technology with a conductivity electrode (K=1). It meets accuracy requirements across a range of 0.5S/cm ~ 200mS/cm. Measurement modes can be switched among conductivity, TDS, salinity and resistivity. Multinomial algorithms are used for TDS and salinity conversions to ensure full-scale conversion precision. The meter also auto-recognizes 8 conductivity standard solutions and offers 2 types of standard options (Europe & USA and China). DO Mode: Dissolved oxygen measurement supports ATC plus manual salinity and manual pressure compensation. A polarographic DO electrode is used, featuring a short polarization time of 3-5 minutes. Additional Notes: Compact, versatile meters ideal for labs, water quality monitoring and education. All technical parameters as specified above.