• Drinking water
  • Measurement of water post aeration / filtration to monitor removal process efficiency.
  • Monitoring of source water manganese levels from either surface waters or boreholes. Seasonal changes and water level tables can significantly affect or influence the concentration of manganese in source waters.


The determination ranges of the manganese analyzer vary from trace μg/L to 50 mg/L Mn2+ using the (optional) internal dilution module. Ranges also depend on the colorimetric method used.


The determination of traces of manganese is performed photometrically using LMG method. Manganese in lower valency states is oxidised to form permanganate by the action of an oxidising agent. The formed manganese dioxide is able to oxidize leucomalachite green to malachite green. Malachite green is intensive blue colored when the solution is buffered between pH=4 and pH=5. This blue color (absorbance) intensity is proportional to the manganese concentration in the sample and is measured at 430 nm.

The determination of manganese is performed photometrically using PAN method. The PAN reagent is suspended in water by use of a surfactant and forms a color complex with manganese. The absorbance intensity is proportional to the manganese concentration in the sample and is measured at 572 nm.

In alkaline solution manganese reacts with formaldoxime to form an orange-red complex. The color developed is proportional to the manganese concentration. The intensity of color produced in the test is proportional to the total manganese concentration.



Wavelength 430 nm
Number of reagents 3

Technical Specifications

Model 3S-CL
Sampling Mode Batch, with freely settable frequency.
Sample Pressure: Atmospheric
Temperature: 5 ‐ 45°C (41 ‐ 113°F)
Flow Rate: 80 to 500 mL/min
Connection: 6 mm (¼-in.)
Drain Pressure-free drain
Connection: 12 mm (½-in.)
Input Streams 2
Material Epoxy-coated stainless steel AISI 304
Dimensions (H x W x D) 604 x 380 x 210 mm (23.6 x 14.8 x 8.2 in)
Weight 20 kg (44 lbs)
Power Supply Input Voltage: 115 VAC,230 VAC,24 VDC
Power consumption: max. 80 W
Output signals 2 x 4-20 mA analog outputs
Modbus via RS485,Ethernet
Alarms 2 SPDT programmable voltage-free relays
Digital Input None, Online, Start Extra, Skip Idle, Emergency Stop
Ambient Temperature 5 - 45 °C (41 - 113 °F)
Ambient Humidity 10 - 90 % RH (non-condensing)
Protection Grade IP54 (indoor only, outdoor use possible with external cabinet, not included)