Measures dissolved oxygen (DO) concentration in ppm (mg/L) and % saturation
0.01 mg/L or 0.1% DO resolution
Compensates salinity, temperature, and atmospheric pressure 
Allows up to 2 calibration points using galvanic DO electrode
°C & °F temperature readings
With real-time clock and date/time stamp for GLP compliance
Auto log data; built-in memory can store up to 1000 data
Auto stable, auto hold, and real-time measurement modes
Auto shut-off (programmable: up to 30 minutes)
Built-in electrode holder allows 2 electrodes to be attached 
Monochrome LCD with white LED backlight: 50 x 50 mm
Phono jack output for connecting meter to computer via PC (USB) cable for data collection and software upgrade and to printer via printer (RS232) cable for printout 
Casing is IP67 waterproof/dustproof, shock & scratch resistant, non-slip
Powered by 2 x AA batteries
Packaged with galvanic electrode in carrying case