• Automatic temperature compensation ensures accurate readings over the entire range.
• Auto-Read function senses and locks the measurement endpoint.
• Calibration due alarm prompts user to calibrate the meter regularly.
• Auto-Power Off effectively conserves battery life.
• Setup menu allows setting the number of calibration points, resolution, stability criteria, date
and time, etc.
• Reset function automatically resumes all settings back to the factory defaults.
• Expanded memory stores or recalls up to 500 data sets.
• USB communication interface is easy to transfer data to PC.
• Multi-mode power scheme (batteries, power adapter and USB port) ensures that using the
meter smoothly.

• Research and education
• Surface and groundwater monitoring
• Other industrial applications

Model	YR01819-1
Dissolved Oxygen
Range	0.00 to 20.00mg/L
Resolution	0.01, 0.1mg/L, selectable
Accuracy	±0.2mg/L
% Saturation of Oxygen
Range	0.0 to 200.0%
Resolution	0.1, 1%, selectable
Accuracy	±2.0%
General Specifications
Calibration Points	1 or 2 points
Temperature Compensation	0 to 50°C/32 to 122°F, automatic
Pressure Correction	60.0 to 112.5kPa/450 to 850mmHg, manual
Salinity Correction	0.0 to 50.0g/L, manual
Stability Criteria	Low or high
Calibration Due Alarm	1 to 31 days or off
Memory	Stores up to 500 data sets
Output	USB communication interface
Connector	6-pin nimi-DIN
Display	Custom LCD (80×60mm)
Power	3×1.5V AA batteries or DC5V power adapter
Battery Life	Approximately 150 hours (turn off the backlight)
Dimensions	170(L)×85(W)×30(H)mm
Weight	300g