Temperature Mode  
Range -5° to 105°C (23° to 221°F)
Resolution 0.1 (0.1)
Relative Accuracy ±0.1
DO Mode  
Concentration Range

Polarographic: 0 to 90mg/L
RDO optical: 0 to 50mg/L

Concentration Resolution 0.01, 0.1
Relative Accuracy Polarographic: ±0.2mg/L; ±2%
RDO optical: ±0.1mg/L up to 8mg/L, ±0.2mg/L up to 20mg/L, 10% of reading beyond; ±2%
% Saturation Range Polarographic: 0 to 600
RDO optical: 0 to 500
% Saturation Resolution 0.1, 1
Salinity Factor 0 to 45 ppt, manual
Calibration Water-saturated air, air-saturated water, manual (Winkler) and zero point
Inputs 8-pin mini-DIN
Sensor Types Polarographic or RDO (optical/luminescence-based) DO
Data Management 2000 points with date/time stamp
Output RS-232, USB
Display Graphic LCD; simultaneous display of measurement, temperature, date/time, and more
Power Supply Four “AA” batteries or optional universal AC line voltage
Environmental Operating Conditions  
Relative Humidity 5 to 85% non-condensing