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power souces

A

Anonymous

Guest
The power source of metal detectors seems to be one of the most controversial and questionable components out there. How about powering those little pulse induction puppies with fuel cells? The technology exists for miniture cells so it shouldn't be long before the power source is stabilized, perhaps even housed inside the detector. The depth limits of pulse induction are bound by scientific law but lithium ion and NiMH just aren't cutting it in my opinion.Ho hum.
 
Hi Warren,
Just how deep do you want to go? Some PI users do not want more depth without a quantum leap in digging aids. Perhaps that is where a fuel cell would be more useful - powering a self digging scoop!
Eric.
 
Try putting a jet engine on a chip running on diesel into a pulse detector consuming a 100 watts and hour.
Only thing holding it back is materials tech. It seems the turbines implode after a few hours. Give it a few more years.
bing
 
Well, I hunt nuggets in west australia and am quite happy with the depth of the sd2100, but living out bush for six month periods and having to recharge the batteries all the time coupled with packing them around is somewhat of an inconvenience and that was the basis of my proposal.
 
A good one -- lugging that Minelab battery around all day is a chore because there's no place that it doesn't chafe after a few hours.
H-Power (bought out by Plug Power) was making mini fuel cells for powering military radio equipment a few years ago, maybe it will come to fruition in our lifetimes.
 
Hi Warren,
Sorry if I misunderstood your post; I thought you were looking for more depth.
Batteries for the SD's are a bit of a problem as they are very current hungry machines; Nearly 700mA, if I remember right. If 4/3AF NiMh batteries are used of 3.8AH capacity, this would give a maximum 5.4 hours of operation before charging, or changing, the pack.
I agree that a light, high capacity power source would be a useful feature when out in the bush for long periods. However, with today's electronic technology, it should be possible to design an SD equivalent, that consumes maybe a 1/10 of the current. This would translate into 40 - 50 hours of operation on the same battery.
Eric.
 
Sounds good.Thanks, Eric, now I just need to calibrate my spell checker!
 
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