helium analyzer

Nuvair O2 QuickStick - $250 USD Made in 2019 but new sensor in 2023. Checked against air and pure O2 - fast and accurate response. With plastic protective tube. Oxycheq Expedition HE - $400 USD Older unit but factory serviced a few years ago. With charger and OMS flow control for BCD fitting...

Used Analytical Industries 4001 Helium Oxygen Trimix Analyzer. In good working condition, with some wear on the outside (see photos). Battery replaced in August 2022. O2 sensor replaced in April 2022. Helium sensor was manufactured in September 2016. I spoke to AII: because the helium...

Hi all, I have one of the Oxycheq He Analyzers and need a battery pack for it. A new battery pack from the manufacturer costs about $70. In my opinion, this is a little bit on the high end, especially since I like non-rechargeable batteries much better for this purpose. Does anybody know which...