Specifications

Dissolved
Oxygen
SM600
Portable Dissolved Oxygen Meter for Education
The SM600 is a Portable Dissolved Oxygen meter ideal for
use in school laboratories. Dissolved Oxygen measure-
ments are also very important in fish farms and ponds,
where Oxygen levels are continuously monitored to obtain
optimal reproduction.
The SM600 calibrates easily in 2 points (at 100% saturated
air and in 0 Oxygen solution) and has Automatic
Temperature Compensation which guarantees the highest
accuracy.
The low battery warning, easy to replace screw on cap
membranes make this meter very simple to operate.
Rugged Carrying Case (Optional) provides handy on-site
meter calibration and measurements.
SM600 is supplied complete with a MA840 D.O. polaro-
graphic probe with 3 m cable, calibration screwdriver, 2
spare membranes, MA9071s (30 mL) electrolyte solution,
battery and instructions.
Ordering Information
SM600 is supplied complete with MA840 probe, 2 spare
membranes, 20 mL bottle of electrolyte solution, calibra-
tion screwdriver, 9V battery and instructions.
Accessories
MA9070 Zero Oxygen calibration solution,
230 mL bottle
MA9071 Refilling Electrolyte solution,
230 mL bottle
MA840 D.O. Probe
MA841 Spare membrane (5 pcs)
Specifications SM600
Range O2 0.0 to 19.9 mg/L
Resolution O2 0.1 mg/L
Accuracy (@25°C) O2 ±1.5% Full Scale
Calibration manual on 2 points (zero and slope)
Temperature Compensation automatic from 0 to 30°C
Probe MA840 (included)
Environment 0 to 50°C / 32 to 122°F;
max RH 95%
Battery Type 9V alkaline (included)
Battery Life approximately 70 hours of use
Dimensions 145 x 80 x 40 mm
Weight 220 g (with battery)
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ALTITUDE & SALINITY COMPENSATION:
If the sample contains salts or if you are performing the measurements at altitude different
from sea level, the readout values must be corrected, taking into account the lower degree
of oxygen solubility.
Salinity Compensation:
the table below shows the influence of salt concentration in the
measurement of oxygen.
In SM600 all the readouts are referred to 0 g/L of salinity value. In fact, salinity affects D.O.
concentration by decreasing its value. The table below reports the oxygen solubility at var-
ious temperatures and salinity.
From the table it is possible to calculate the quantity to be subtracted to correct the
reading.
Salinity (g/L) at Sea Level
°C 0 g/L 10 g/L 20 g/L 30 g/L 35 g/L °F
10 11.3 10.6 9.9 9.3 9.0 50.0
12 10.8 10.1 9.5 8.9 8.6 53.6
14 10.3 9.7 9.1 8.6 8.3 57.2
16 9.9 9.3 8.7 8.2 8.0 60.8
18 9.5 8.9 8.4 7.9 7.6 64.4
20 9.1 8.5 8.0 7.6 7.4 68.0
22 8.7 8.2 7.8 7.3 7.1 71.6
24 8.4 7.9 7.5 7.1 6.9 75.2
26 8.1 7.6 7.2 6.8 6.6 78.8
28 7.8 7.4 7.0 6.6 6.4 82.4
Polarographic D.O. Probe
Polarographic D.O. probe with 2 meters cable