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Product Name: -2~20ph Portable Digital PH Meters with ATC and mV Measuring for Waste WaterModel: BDJK-740Description:This Portable Meter is a high performance portable pH/ORP meter designed for outdoor applications. The meter contains a built-in setup menu that provides many advanced and useful options to improve accuracy of measurement and simplify operation.Features:Stored data can be transferred into computer via USB communication interface.Built-in real-time clock stamps stored data to meet GLP standards.Expanded memory stores and recalls up to 500 readings.Reset function can resumes all settings to factory default values.Setup menu lets user customize buffer standard, calibration points,stability condition, resolution, temperature unit, date and time to meet measurement requirements.Help message as a operational guide that can help users quickly use the meter.Manual temperature calibration provides accurate temperature value.Automatic endpoint function freezes the stable measured values for easy reading and recording data.Absolute or Relative millivol