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The most Robust Accurate  and Low Cost probe available

 The oxygen probe is a very high performance and extremely robust  oxygen probe manufactured by Dryden Aqua  for the measurement of oxygen in water and air. The probe provides for a low cost, easy maintenance sensor suitable for connection to Dryden Aqua monitors ( AquaTraul), or your own instrumentation.

The probe has a high mv out-put for PLC based controllers, the high out-put increases accuracy and reduces electrical noise problems. The unique shape provides a streamlined approach.

Reference of the Dryden probe used in research

Typical Applications

• Aquaculture
• Rivers and lakes
• Sewerage effluent
• Industrial waste water treatment systems
• Hydroponics
• Almost any application where you need to measure  the oxygen content of a liquid
• Air quality monitoring, environmental warehouses

Technical Properties

The oxygen  probe is a galvanic cell, basically the probe acts like a battery in which there are two dissimilar metals in a conducting electrolyte solution. The anode is zinc and the cathode is silver, oxidation takes place on the surface of the anode to form a white deposit of zinc oxide. The rate of oxidation is a function of the diffusion of oxygen through a semi permeable Teflon membrane, which is in turn directly related to the partial pressure of oxygen in solution, or in the air. A potential difference is established in the probe, the milli volt out-put being approx. 6mv per 1 mg/l of dissolved oxygen. This gives the probe a reading of approximately 60mv when in air.

Any length of good quality two core  ( 0.5mm squ, multi-strand) cable can be connected to the probe,  technically there is no limit to the length of cable that you can attach,  however we have only tested to 2000 meters. General maintenance is also very easy,  all that you need to do is keep the probe membrane reasonably clean,   this is achieved by giving the membrane a wipe with a cloth once a week.

Transmitter turns probe into a full blown Oxygen meter

4 to 20mamp transmitter and Oxygen meter with 2 x alarms outputs

The Dryden Aqua DIN rail mounted oxygen transmitter will accept an input directly from our Oxygen Probes. The transmitter can then send the value back out as a voltage ( e.g. 0 to 10v) or analogue out-put, (0 to 20mamps, or 4 to 20mamps)

The transmitters are provided with a clip on front display which is used to program the transmitter for different functions. The display gives the raw data out-put from the oxygen probe.  It is useful to display the raw data, especially if you are using PLC based systems. The display can also be used to calibrated the unit to display the data as dissolved oxygen.  This makes for a very low cost multi-channel dissolved oxygen monitor.

The transmitters clip onto a standard DIN rail, so all you need to do is purchase the oxygen probes  and transmitters from Dryden Aqua and fit the transmitters into a box.  The Oxygen probes connect directly onto each transmitter

Transmitter model 4116 has the same specifications, but also includes two relay out-puts that can be programmed

Clip on display provided with the transmitters gives a direct reading  of the out-put from the probe in milli volts or mg/l of oxygen