GPS coordinates: lat: -26.050037 - lng: 28.086132
Intelligent Fencing Systems
Address:
2301 Lincoln Ct., 2146 Sandton
Telephone:
+1-813-315-8082
Fax:
+1-775-796-2668
Description
We manufacture and export the Fence Hawk, a perimeter security alarm that monitors your electric fence for low voltage and tampering - cutting, shorting, etc. Runs on 12 v. DC (motorbike battery) and is independent of power failures. Compatible with all commercial fence energizers, worldwide. Can also monitor fences plugged directly to the grid, up to 220 volt, AC or DC.
Keywords
Security, Alarms, Fences, Electric, Monitors, High, Voltage, Burglar, Alert, Intruder, Warning, Perimeter, Array, Burglary, Trespass, Hawk, TrespassersCompany description
The Fence Hawk™ is designed to work with ANY electric fence charger commercially available in the world.We certify it for up to 25, 000 volts, which is more than any charger on the market puts out, but we’ve tested it successfully at 40, 000 volts.
It will also work on fences that are plugged directly into the power grid, up to 220 volts.
Other fence monitors measure the average voltage per second (hertz). A change in the hertz (cycles/second) will give a different voltage reading or output. This type of voltage measurement is extremely susceptible to false alarms and is only accurate for the hertz or cycle that the instrument is set to.
Lightning strikes on or near a fence or array monitored this way will often generate a false alarm.
Any alarm system that generates false alarms is worse than no alarm system at all.
The Fence Hawk™ measures the absolute voltage on the fence. It doesn’t matter if it’s a 3, 000 volt rabbit fence or a 15, 000 volt rhino fence – the Fence Hawk works on all electrified fences.
Since the voltage pulse only lasts 50 to 100 microseconds (0.00005 to 0.00010 seconds), this is a good trick. But because we can do this, we know when the fence is being shorted, grounded or jumpered.
This also allows the Fence Hawk™ to give a separate warning for low voltage conditions, which are almost always caused by vegetation.
There are some other conditions that can cause low voltage, too, but the point is this: low voltage conditions should not generate a full-scale alert, which would be the equivalent of a false alarm.
The voltage drain from vegetation will still allow the fence to give a painful shock.
The goal here is to alert someone to clean the fence before the voltage drain makes the fence ineffective.
This method of monitoring also prevents false alarms from nearby lightning strikes.
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