Slightly OT:
I would never ever want to rely on some mumbo-jumbo wireless tech for something that is vitally important.
Exhibit 1: https://www.suunto.com/Support/recall/suunto-wireless-tank-pressure-transmitter-and-suunto-tank-pod-recall/
The recall was for a mechanical issue, nothing to do with wireless mumbo-jumbo.
When a wireless transmitter fails the display turns to garbage and provides an obvious and immediate indication that action is necessary. When mechanical guages fail they tend to stick indicating more gas than is actually available. Over a 28 year period with over 2000 dives I ended up performing three rescues as the result of faulty mechanical guages. Personally I try to maintain a mental picture of how much gas I am breathing and how much I still have available - kept me alive a couple times :eek
Well, i think this is just a first generation of products of this kind so they will be improved by the time.
The transmitters have been around for 25 years. From what I recall Uwatec were the first to introduce them on the AirX in the mid 1990s. I still have one knocking around somewhere.
Also, very handy reason for having such a devise is so that the instructor can monitor the pressure of the students or "fun divers". Such dives are usually pretty safe, very well controlled and thus not very dangerous. With such monitor, the instructor doesn't need to stop dive and ask everyone for the remaining air.
I am a qualified scuba instructor and you just triggered me
Monitoring students air with a remote device helps the instructor to cover their own backside but it is not teaching the students to dive. Stopping and checking guages is how students learn they need to do it themselves with their dive buddy. I am very much of the opinion that would-be divers should learn the basics of life support before they even attempt to have 'fun' underwater.
On top of this, everyone can have it's own monitor which is not wireless but a hose connected directly to a bottle.
Ahh but...Failure points
Off topic. Sorry.