Features: • High accuracy benchtop dissolved oxygen meter is equipped with a large LCD display. • 1 or 2 points calibration using the air-saturated water and zero oxygen solution. • Manual salinity and barometric pressure compensation improve the measurement accuracy. • Automatic Temperature Compensation ensures accurate reading over the entire range. • Calibration Due Reminder prompts user to calibrate the meter regularly. • Stability indicator automatically shows current measurement status. • Auto-Hold function freezes stable reading for easy viewing and recording. • Selectable temperature unit (°C or °F) meets different application requirements. • Help message as a operational guide that helps you quickly begin using the meter. • System menu allows setting the 9 parameters, including the number of calibration points, resolution, stability condition, concentration unit, etc. • Reset feature automatically resumes all parameters back to factory default settings. • Expanded memory stores and recalls up to 500 readings. • Built-in real-time clock stamps stored data to meet GLP standard. • Stored data can be transferred into computer by USB communication interface.