HighPressureLogger ... Re: Which protocol to implement on a home brewed diving computer ?

["Paul-Erik Törrönen"]

> I wouldn't use a hp hose to connect the sensor with the 1st stage as it
> increase the risk of failure. I think it's better to connect the sensor
> to the hp port directly but place the rest of the electronic away from
> it. so you can have a very tiny sensor and only one hp connection and
> one O-ring. the 'logger' and battery can be place away at a place where
> size is nit critical.

Why not just splice the one HP port, put in a T-junction, one for the
gauge and the other for the sensor. After all, you're not measuring the
flow, but the pressure.

As it was obvious in the pic-link that Anton sent, the second HP-port on
the Apeks DST4 is very exposed to hits. This of course is a model-specific
issue, but DST4 seems to be very popular as stage/bailout regset.

> I also find it very annoying that most or even all wireless pressure
> sensors are very bulky. it also lead to people carrying the tank holding
> the wireless sensor :(

That may be the case, but IMO the big problem is that the bulkiness also
works as a lever, making it more prone to be broken. Hence the practice
has been that you put a short, 10cm, hose in between. I think somebody
already mentioned this practise?

Poltsi

-- 
Paul-Erik Törrönen   "When science and the Bible differ,
poltsi at 777-team.org   science has obviously misinterpreted
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