Inside a Puremate "ioniser" (it's an ozone generator)

The circuitry in this unit is strange. It almost appears to be for diagnostic purposes, or maybe to add an air of sophistication. The PCB at the front could literally be removed and replaced by a single LED.
Although this unit is described as an ioniser, it's more of an ozone generator. There's definitely air ionisation involved, but it's immediately followed by an opposite polarity plate to create a distinct plasma discharge and strong breeze.
The discharge on the end of the sharp stainless steel spikes is very visible in a dimly lit room.

The unit produces enough ozone to be an irritant in a small space, but in a large house it could be viable for replenishing the active elements of the natural air that quickly dissipate in an indoor environment. (Normal outdoor air typically contains around 0.01 parts per million of ozone.)

There's a removable aroma-bead capsule in the base, and the unit is supplied with nauseating vanilla scented beads. It seems strange to do that with an ozone generator. It might be to mask the smell of ozone in its direct vicinity.

I'm pretty sure these units go back a long way, which might explain the slightly retro circuitry. They go under various brands with fairly full-on marketing. It's reassuring that they do specifically mention the ozone or "active oxygen" in their technical data, and even state an ozone output of 5mg an hour.
The style and construction is actually very good. They feel solid with a nice texture on the plastic surface. Internally, the stainless spike-plate, aluminium panel and potted high voltage module seem well designed.

I'm pro-ozone if used to refresh indoor air at very low levels. This unit is probably best suited to quite large areas. I'm not sure it would be wise to use it in a small bedroom.

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