The Aeroqual Series 900 Ozone Transmitter / Controller is designed to measure and control ozone concentrations, and to communicate to a variety of hardware systems. The Series 900 Transmitter / Controller can operate as a single unit or part of an analogue or digital network for measurement or control purposes. It can also support distributed control functions, and internet based information systems.

The Aeroqual Series 900 provides a 4-20 mA signal that is linearly proportional to the ozone concentration. The full scale value is dependent on the sensor head type. The unit automatically recognises the sensor head type and sets the default full scale range. The output scale can be user set. The ozone concentration can also be determined using the RS485 communication system.

The unit can be used as a control device (to maintain the ambient ozone concentration between user defined levels) and as a simple switching device (signalling alarms relays or equipment on or off). The Series 900 output settings are factory set but the settings can be readily changed.