City CiticeL 4OXV Oxygen Sensor For BW Gas Detectors – New PCB Mount Replacement

So you need an oxygen sensor for your BW gas detector?

This one’s from City, the CiticeL 4OXV—also known as 40XV or AAY80-390.

It’s brand new, never used, and comes in its original packaging.

It’s a single-row sensor with PCB mounting style, so make sure your setup matches.

It’s not a custom bundle or modified, just a straight-up replacement sensor.

No UPC, but that’s fine.

It’s made for gas detectors, so if your old one’s giving wonky readings, swap it out with this.

Operating voltage is listed as 0, but that might just mean it’s passive—double-check your manual.

Solid little component from a trusted brand.