Obsolete Dissolved Oxygen Instruments
Since 1982 we have supplied different types of dissolved oxygen controllers to suit our customers' needs. The common ones are displayed below, note the DO2 controllers are usually part of a family of controllers which usually include pH, Redox Conductivity and Dissolved IOxygen.
Our current controllers offer one of the widest range of controllers available which match each other for panel mounting they include pH, Redox, Conductivity, Resistivity ( for ultra pure water up to 18mΩ ) Solution strength using Electrodeless Conductivity, Dissolved Oxygen, Residual Chlorine, Turbidity, and Specific Ion measurement.
Model 60/144B
Model 60/144B Panel mounting Dissolved oxygen controller with 2 control relays and 0 - 20 mA output. Supplied 1982 / 83.
Replacement instrument Model OD7685 DO2 controller which has two on/off control relays and an isolated 0 -20 / 4-20 mA out performs the original.
Model 65B
Model 65B Surface mounting DO2 controller with 2 control relays and 0 - 20 mA output. Supplied 1982 / 84.
Replacement instrument Model OD7685-W DO2 controller which has two on/off control relays and an isolated 0 -20 / 4-20 mA out performs the original.
Model Aquatronic AOPL2 DO2
Model Aquatronic AOPL2 DO2 controller surface mounting, 2 control relays with for on/off control of blowers or valves.
Replacement instrument Model OD7685 DO2 controller which has two on/off control relays and an isolated 0 -20 / 4-20 mA out performs the original.
Model Aquatronic APWL2, APWCF2, APWCI2
Model Aquatronic APWL2, APWCF2, APWCI2 Surface mounting version of the APP range which were the same instruments in weatherproof enclosures.
Replacement instrument Model OD7685-W DO2 controller which has two on/off control relays and an isolated 0 -20 / 4-20 mA out performs the original.
PVC galvanic sensor
PVC galvanic sensor with buffered carbonate filling solution no longer available. Manufacture ceased in the early 1990s, so most sensors are around 15 years old.
Replace both the instrument with OD7685 and DES1 DO2 sensor. The original systems have given good service with a low cost of ownership so a similar system should offer the same service.