AZ Instrument Corp. is a manufacturer of precision environmental measuring instruments, including water quality testers, data loggers, and air quality monitors.
AZ Instrument Corp., established in 1991, is a specialized manufacturer of measuring instruments based in Taiwan. The company integrates expertise in electronics, precision engineering, and high-efficiency manufacturing to produce a wide range of environmental monitoring tools. AZ Instrument is well-regarded for its professional-grade devices used in laboratories, agriculture, HVAC, and industrial processes.
Their extensive product catalog includes water quality meters (pH, conductivity, dissolved oxygen), indoor air quality (IAQ) monitors, CO_2 gas analyzers, anemometers, and digital psychrometers. They also produce advanced data loggers and thermal printers designed to work seamlessly with their measurement devices. AZ Instrument provides solutions that assist professionals in maintaining accurate environmental control and compliance with safety standards.
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Most AZ pH meters require immersion in standard buffer solutions (pH 4.0, 7.0, or 10.0). Press the CAL button to enter calibration mode, insert the probe into the buffer, and wait for the reading to stabilize and lock.
If the probe has been stored dry, re-hydrate the sensing tip in distilled water for about 2 hours. Ensure the sensing surface is clean and free of scratches or biofilm.
Some AZ data loggers have a hardware reset pinhole on the rear side. Use a small tool to press the button inside the pinhole to reset the device to default settings.
'Err' usually indicates a calibration error (wrong buffer solution or damaged probe) or a value out of the measurable range. Check the sensor connection and ensure you are using correct standards.