Good solution for the environment.
The Gommint won't let us have open contacts (even low-V, high resistivity)
in our environment, so I cobbled up a very similar "low powder" sensor
using, like you, a follower, a FLOAT (yes, it floats in the powder), a
magnet, and an encapsulated mecury-wetted reed switch.
On Tue, 22 May 2007 07:32:02 -0400, "Lloyd E. Sponenburgh"
I thought about a reed switch, this seemed quicker and easier. I
probably would use a reed switch on a powder float.
The few microamps and 3 volts that this switch operates would easily
meet Gummint intrinsic safety rules for explosive environments, don't
know about special pyrotechnic considerations.
Probably would here, too. But the inspectors don't know a thing about the
technology, so you have to spend about $6K to have a new design certified by
an independent lab, or you cannot use it.
I can build a lot of magnetic switches for $6K.... <G>
Perhaps just slightly more than a minimal soluton to a problem I had.
A paint band would work if one thinks to look at it periodically,
YMMV. I wanted something that'd grab my attention, since I'm already
doing several tasks at once while reloading in an indexing turret
press. Place brass in station 1 with right hand, eyeball charge in
station 3 before placing bullet with left hand, push lever with right
hand to seat primer in station 2 and then pull lever to deprime,size,
seat and crimp in the various stations. Once I get rolling this thing
spits out ammo like a jellybean dispenser. I want good ammo. Still
do 100% QC, visual and a quick weigh to check for no-charge or
double-charge. Never had a double charge yet but I've caught a couple
of no-charges due to operator error. I'm new at this.
Besides, this was more fun.
I think the Dillon solution has a buzzer -- but I probably wouldn't
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