EUTECH DO450 Portable Disolved Oxygen Meter

Product Features
Dissolved Oxygen / Temperature
Affordable optical RDO technology reduces maintenance time and costs
::    Maintenance free optical probe with no electrolyte eliminates hassle of replacing delicate membranes and salt build up from refilling solutions     
::    Durable waterproof and dustproof design with IP67 rating     
::    Large, backlit custom display provides measurement with temperature     
::    Switch between % saturation and mg/L (ppm) dissolved oxygen with a press of a button     
::    Calibration due alarm – Set a visible reminder when it is time to recalibrate the meter     
::    Manual barometric pressure and salinity correction     
::    Selectable ºC or ºF – Choose the unit to best fit your application     
::    Ready indicator, manual or automatic measurement hold feature and optional automatic shutoff function     
::    Store up to 500 data sets – Easy USB or RS232 output with optional data cables     
::    Built-in real-time clock stamps stored data and calibration data with time and date – Meets standards for GLP (Good Laboratory Practices)     
::    500 hours battery life or use optional universal power adapter      
::    Built-in stand with wall-mount – Allows for easy benchtop measurement and storage

Dissolved Oxygen     
Range    0 to 200 %; 0 to 20 ppm/mg/L
Resolution    0.10 %; 0.1 ppm/mg/L
Accuracy    
±2 %; ±0.1 ppm or mg/L up to 8; 
±0.2 ppm or mg/L above 8
Calibration    
Zero and saturation
Temperature     
Range    0.0 to 50.0 ºC (0.0 to 122.0 ºF)
Resolution    0.1 ºC/ºF
Accuracy    ±0.5 ºC; ±0.9 ºF
Calibration    Offset in 0.1 increments, ±10 ºC or ±18 ºF
Others     
Display    Custom LCD with backlight
Memory    Stores up to 500 data sets
Output    USB or RS232
Real-Time Clock    Time and date stamp on calibration and stored data
Temperature Compensation    Yes
Pressure & Salinity Compensation    Manual
Power    Two AA batteries (included), >100 hours (without backlight); AC adapter (optional)
Dimensions (L x W x H)    
Meter: 7 7/8" x 3 1/8" x 2 1/4" (20 x 8.3 x 5.7 cm)
Boxed: 9 1/8" x 9 1/8" x 2 3/4" (23 x 23 x 7 cm)
Weight    Meter: 1 lb (0.5 kg)
Boxed: 1.4 lb (0.7 kg)