Portable Dissolved Oxygen Meter

We are offering portable dissolved oxygen meter.automatic calibration: the meter can be calibrated by one or two points. The meter with function of auto recognition when in calibration.
Automatic temperature compensation: due to influence on the range of dissolvability and diffusion caused by temperature, the meter must compensate temperature when measure dissolved oxygen.
salinity coefficient and atmospheric pressure:
the salt dissolved in solution will limit oxygen content. Relationship between oxygen's concentration and nutrient changed with the salinity of sample solution. The meters can set salinity value in the range of 0 to 35gl, and can set atmospheric pressure in the range of 450 to 850 mmhg.
Save data:
the meter can save data 48 sets. Press [save], and the meter will store current measured value automatically and serial number, date, time and other information.
Output data:
the data stored in meter can be sent to pc through link. You can also save measured value or print out test report via software.
Multi-measurement units: the meter can set parameter units accord with your country. E.g the conversion between measured units mgl and ppm; pressure units kpa and mmhg; temperature units °c and °f.
Model sts-3820 sts-3821
dissolved oxygen range 0.0~20.0mgl or ppm
0.0~20.0mgl or ppm
resolution 0.1mgl 0.01mgl
dissolved oxygen accuracy ±0.5mgl ±0.3mgl
saturation of oxygen 0.0~200.0% 0.0~200.0%
accuracy ±10.00% ±5.00%
temperature range 0.0~50.0oc or 32~122of
temperature accuracy ±1oc, ±1.8of
temperature compensation 0.0~40.0oc, automatic
calibration points 1 or 2 points
salinity correction 0~35gl, adjustable
atmospheric pressure correction 450~850mmhg or 60.0~112.5kpa
memory 48
output usb
power requirement 9v800ma battery
display 4.3 inch lcd
dimension 185(l)mm×88(w)mm×32(h)mm