Instruction Manual
Instruction Manual

Mi190 Dissolved Oxygen / Temperature Laboratory Bench Meter

Ideal for testing Dissolved Oxygen in the pharmaceutical and food Industry, as well as monitoring in water treatment plants. The user can choose to measure D.O. readings in mg/L or % of saturation of O2.

This meter can be used for any type of water, as it allows measurements to compensate for temperature, altitude and salinity factors. The automatic logging interval can be set to perform analysis and store data into the memory.

All logged data can be downloaded to your PC through an RS232 or USB serial port. Memory can store up to 50 samples.
Mi190 features an automatic calibration procedure, at 1 or 2 points (at 0 and 100% of O2 saturation). The polarographic probe supplied with the meter (MA840/2) measures the current generated by the reaction of O2 with Ag.

Mi190 is supplied complete with MA840/2 DO probe with 2 m cable, 2 spare membranes, MA7041 electrolyte solution (30 mL), 12 VDC power adapter, probe holder and instruction manual.

Polarographic D.O. Probe
Polarographic D.O. probe with 2 meters cable
Rear Connector Panel layout
Communication to the PC is done via opto-isolated USB and RS232 ports..
O2 Range 0.00 to 45.00 mg/l (ppm)
% Saturation O2 Range 0.0 to 300%
Temp Range -5.0 to 55.0°C / 23.0 to 131.0°F
O2 Resolution 0.01 mg/l (ppm)
% Saturation O2 Resolution 0.1%
Temp Resolution 0.1°C / 0.1°F
O2 Accuracy ±1.5 Full Scale
% Saturation O2 Accuracy ±1.5 Full Scale
Temp Accuracy ±0.4°C / ±0.8°F
Logging 50 records, LOG on demand or auto-logging
DO Calibration automatic, 1 or 2 point at 0% (MA9070) and 100% (in air)
Temperature Compensation 0.0 to 50.0°C / 32.0 to 122.0°F
Altitude Compensation 0 to 4000 m; resolution 100 m
Salinity Compensation 0 to 40 g/L; resolution 1 g/L
DO Probe MA840/2 with DIN connector (included)
Temperature Probe Included in DO probe
Calibration 2 points (0.0°C and 50.0°C / 32.0 to 122.0°F)
Log on demand up to 50 records
PC Interface RS232 / USB Opto-isolated
Environment 0 to 50°C / 32 to 122°F; max RH 95%
Power supply 12 VDC power adapter (included)
Dimensions 230 x 160 x 95 mm
Weight 0.9 kg


MA9070 Zero Oxygen Solution, 230 mL bottle
MA9071 Refilling Electrolyte Solution, 230 mL bottle
MA9315 Electrode Holder
MA841 Spare membrane (5 pcs)
MA840/2 DO probe with 2 meters cable
Mi5200 Application Software
RS232 connection cable with 2 m cable

Mi190 is supplied complete with:
• MA840/2 DO probe with 2 meter cable
• MA841 Spare membrane
• MA9071 Electrolyte solution
• MA9315 Electrode Holder
• Mi5200 Application Software
• MA9350 RS232 connection cable with 2 meters cable
• 12 VDC Adapter
• Instruction manual