Orion Star™ A123 Dissolved Oxygen Portable Meter, Thermo Fisher Scientific (CAT#: STEM-LE-1834-LC)

The easy to use, affordable, waterproof Thermo Scientific™ Orion Star™ A123 Dissolved Oxygen Portable Meter is designed to take simple, accurate dissolved oxygen measurements.

DO Measuring Range:0 to 20 mg/L; 0 to 200 % saturation Polarographic DO
0.01 to 0.1% RDO
Measurement Mode(s):Polarographic DO, Temperature
Measurement Resolution:0.01, 0.1 mg/L; 0.1, 1 % saturation, 0.1 °C

Automatic temperature compensation, manual salinity input and manual air pressure for accurate results
According to your program requirements, calibrate by water saturated air method or Winkler titration method
Accepts Thermo Scientific Orion polarographic dissolved oxygen probe
Non-volatile memory can hold up to 50 data points
Three-year instrument replacement warranty
Thermo Scientific™ AUTO-READ™ locks the stable reading on the screen and displays the ready indicator alert when the reading is stable
The large information screen clearly displays important information, including DO readings expressed in mg/L or% saturation, temperature in °C or °F, meter mode and battery life
LCD displays dissolved oxygen readings and temperature
Icons provide quick updates on battery life and completed calibration status
On-screen message helps you make calibration and setup menu selection
Four AA batteries (included) provide over 2000 hours of runtime
Universal power adapter (sold separately) can be used to operate the meter with AC power

Orion Star™ A223 Dissolved Oxygen Portable Meter, Orion Star™ A323 Dissolved Oxygen Portable Meter, Orion Star™ A326 pH/Dissolved Oxygen Portable Multiparameter Meter, Orion Star™ A329 pH ISE Conductivity Dissolved Oxygen Portable Multiparameter Meter