FEATURES:

• During pH mode, multipoint push-button calibration with auto-buffer recognition.
• selectable pH buffer standards IUSA, DIN, NIST or User-definedJ.
• Automatically calculates and displays electrode slope aftercalibration.
• Calibration due reminder prompts you to calibrate the meter regularly.
• During DRP mode, 1 point offset calibration allows user adjusts displayed value to aknown standard.
• Absolute or Relative mV measurements provides accurate DRP measured value.
• Automatic Temperature Compensation ensures highly accurate measurements over theentire pH range.
• Automatic endpoint function freezes the stable measured values foreasy reading and recording data.
• Help message as aoperational guide to helps you understand how to use meter.
• Setup menu lets user customize pH buffer standards, calibration points, stability conditions ofmeasurement, resolution, temperature units, date/time to meet personal preferences.
• Expanded memory stores and recalls up to 5DO readings.
• Built-in real-time clock stamps stored data to meets GLP standards.
• Stored data can be transferred into personal computer via USB communication interface.

BK-221 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 improves

accuracy of measurements and simplify operations.

Specifications: