Dissolved Oxygen Measurement

MJK Oxix provides data allowing you to control the amount of oxygen thereby obtaining the optimal environment for biology processes.

The right oxygen level makes your process more efficient and ensures that you are not wasting energy on unnecessary operation of blowers and aerators.

Mounted on the float ball, the Oxix sensor will, at any given time, measure the oxygen level at the same depth of the basin. This provides excellent measuring repeatability.

If you choose to use the built-in water/air spray nozzle, the sensor is self-cleaning. That will keep the sensor working with a minimum of manual maintenance.

Read the values on the display or have data transferred directly to SCADA using the built-in ModBus capability.

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    One display handles up to four converters

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    Easy Maintenance

    Oxix’s design insures a minimum of maintenance

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    Cleaning System is Standard

    Air or water jet

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    Easy installation

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    Wide range of accessories makes installation easy

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    Long Lifetime

    No change of sensor parts within the sensor’s lifetime (expected 7-10 years)

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    Three year warranty

    On the sensor

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    Data Logger

    Oxix display has a built-in data logger

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    Oxix measures the oxygen level based on fluorescence. No oxygen is spend during the process

The right level of oxygen in the tanks and basins create the perfect environment for the microbes in the waste water process.
The right amount of oxygen will reduce the operating cost of the plant. The wrong oxygen level can cost extra process hours or days – or ruin the process.
Oxix is developed by MJK to provide exact oxygen measurement using a fluorescent sensor so no oxygen is lost on the measurement.
Oxix has a built-in jet cleaning nozzle, ensuring the small sensor window is clear. This provides the optimal long term efficiency.
Measured values are stored in the built-in data logger and can be read on the multi-language display.
Data can also be transferred to a SCADA system.
Oxix works well in networks with similar transmitters, such as Susix and MagFlux.

For measuring the oxygen level of the water distribution for end-users, the Oxix is a well-proven stable solution with no maintenance on the sensor and a three years warranty on the sensor.
The sensor is a two part sensor consisting of oxygen measurement and a converter displaying the measured values on the clear display. It can also be transferred as 4-20 mA.
The built-in cleaning nozzle can be used with water or air and virtually eliminates any other maintenance of the sensor window.

Measures oxygen based on optical fluorescent measurement - a very trustworthy method.
Oxix can be mounted on a floating ball for surface measurement or on a pipe.
The right level of oxygen, the mg/L, saturation and the temperature are pivotal to provide the optimal FCR.
A built-in cleaning nozzle will keep the sensor window clean without manual work required.
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.
Oxix provides Modbus or a 4-20mA signal which can provide the measured data directly to your system software.
Two relays are built-in to assist the control of the oxygen levels, or to be used for external alarms.
The display can store and present data from up to four different Oxix devices (or other MJK products) on a distance of up to 1000 m.

Oxix mounted with a float ball provides uniform measurement of the dissolved oxygen level in the aeration basin.

The float ball ensures that the Oxix sensor measures at a constant level from the surface, not influenced by a changing level in the basin.

This sensor mounting principle insures an efficient and reproducible measurement of dissolved Oxygen.

Land based fish farms are very dependent on the dissolved oxygen level in the ponds.

When fish eat, consumption of oxygen raises. Hence this is an important parameter. The measurement of the dissolved oxygen is transmitted to either a nearby outdoor mounted display and data logger, or in many cases, directly to the SCADA system.



Accordion control

Oxix™ provides 4-20 mA or ModBus RS485 output


Accordion control

Easy installation trough intuitive setup and calibration menus

Easy Maintenance

Accordion control

No change of sensor parts within the sensor lifetime (expected 7-10 years)

Data Logger

Accordion control

SuSix and Oxix systems have a built-in data logger securing data

Network Capable

Accordion control

One display handles up to four converters and the converters provide Modbus output for easy networking and installation


Accordion control

MJK offers a complete and wide range of installation fittings and accessories that makes installation easy



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

Enclosure rating
Dust and waterproof IP 67, NEMA 6 (mounted on converter)
Indication measurement, configuration and graph
Modbus® RTU-mode, 9600 baud, 2-wire RS-485, master
2 Mb Flash memory, 160.000 entries with date, time, value
USB 1,1 type mini B, Female
+/- 0,1% of reading
Measuring input
Analog output
One active 4 - 20 mA, galvanically isolated (max. load 800 W)
MODBUS® RTU-mode, 9600 baud, 2-wire RS-485, slavemode
Power supply
230 V AC, 50 / 60 Hz ± 10 % or 115 V AC, 50 / 60 Hz ± 10 % or 10 - 30 V DC, or 24 V AC, 50 / 60 Hz ± 10 %
Enclosure rating
IP 67, NEMA 4x
Dissolved saturated oxgen
0 - 25 mg/l or ppm, 0 - 120 % SAT
Measurement principle
Optical, near infra-red fluorescence (lin = 475 nm, Iout = 609 nm)
Max. 6 bar (100 psi)
Better than 1% of actual reading (0,02 mg/l)