SuSix - Turbidity and Suspended Solids Transmitter

SuSix is Intuitive and easy to calibrate, and are produced for long term work in harsh environment.

MJK SuSix provides data allowing you to control the amount of active solids in the process tank, thereby obtaining the optimal environment for biology process.

The products can be used to control and improve the daily processes on waste water, drinking water or aqua culture applications.

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    Very easy installation

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    Limited need of maintenance

    SuSix almost does not need maintenance.

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    Stores up to 20.000 measured values including timestamps

A Susix sensor has 6 optical windows ensuring an optimal analysis of the amount of suspended solids in the process waste water, just as well as the turbidity of the outlet water.
The turbidity range covers 0,001-9999 FNU/NTU/FTU and suspended solids is measured in the range of 0,001g/l to 400 g/l.

Output can be read directly on the converter display, or transferred via Modbus, 4-20mA, to for instance a SCADA system. To ensure safe installation the SuSix is cUL Listed.

The embedded algorithms ensures that 90 % of all applications measuring suspended solids only requires 1-point calibration and should a calibrattion be necessary then SuSix can be recalibrated for different measurement areas at any given time, you can even switch from suspended solid to turbidity measurement very easily.

The converter stores up to 160,000 data points with time and date stamp for statistic purposes.

The turbidity of the drinking water illustrates the amount of particles in the water for the consumer. SuSix is used to monitor this important quality parameter. On delivery the device is fully calibrated for and ready to measure turbidity.

The measuring method is based on luminescence via 6 receiver and transmitter channels. Output is readable from the display and from ModBus or 4-20 mA out which can be connected to other displays or monitoring systems.

This very stable device provides exact measurement of suspended solids and turbidity. This can optimize the process of the outlet water; use SuSix to measure the filtered sludge to get an instant view of state of the dry matter.
Measuring the dry matter in the sludge this way, compared to baking process and an analysis will enhance not only the data input, by the constant SuSix measurement, but also the bottom line of your expenses.
The built-in wiper will keep the 6 point sensor windows clean even in high amount of suspended solids.
There are several display options, the converter and display provides the most complete solution, but for a quick on-site readout, use the simple LCD display.



Optical windows

Accordion control

The optical windows are made of scratch-resistant sapphire glass. Thanks to these hi-tech materials, very little manual cleaning is required.

Acid-resistant, polished steel sensor

Accordion control

The SuSix sensor is produced in acid-resistant, polished steel with a chrome dioxide coating to ensure minimal particle adhesion to the surface.

Cleaning system

Accordion control

When applied to especially demanding environments in which the sensor is likely to become soiled, we also supply a mechanical cleaning system

6 optical windows

Accordion control

With patented measurement system, SuSix measures turbidity in pure water and solids in any thicker liquid, in one sensor


Accordion control

Measure in accordance with ISO 7027 standards. 


Accordion control

SuSix™ is delivered providing 4-20 mA or ModBus RS485 output.


Accordion control

Easy installation, full range of fittings available

Data Logger

Accordion control

SuSix Display holds a build-in data logger 

Minimum calibration needed

Accordion control

No calibration for Turbidity, typically one calibration point only needed for active sludge.



The separate up to five years additional warranty contract must be ordered upon ordering of your MJK product.

Enclosure rating
Dust and waterproof IP 67, NEMA 6 (when mounted on Converter)
Indication measurement, configuration and graph
MODBUS® RTU-mode, 9600 baud, 2-wire RS 485, master-mode
2 Mb Flash memory, 160.000 entries with date, time and value
USB 1,1 type mini B, Female
+/- 0,1% of reading
Analog output
One active 4 - 20 mA, galvanically isolated (max. load 800 ohm)
MODBUS® RTU-mode, 9600 baud, 2-wire RS 485, slave-mode
Power supply
230 V AC, 50 / 60 Hz ± 10 % or 115 V AC, 50 / 60 Hz ± 10 % or 24 V AC, 50 / 60 Hz ± 10 %
Enclosure rating
IP 67, NEMA 6
0.001 - 9999 FNU/NTU
Suspended solids
0.001 - 400 g/l (SiO2)
Measurement principle
Infrared-diode system and beam focusing (l = 860 nm)
Accuracy (turbidity)
Better than 3% of actual concentration
Accuracy (susp. solids)
Better than 5% of actual concentration (depends on calibration and media)