Hi there could you explain further how your customers established more than four sensors. How can you distinquish clearly between set up zones or regions?? For example if I had five sheds on my farm how could I Distinquish the 5th shed, or Additionally a road?.
Short answer... you can't distinguish more than 4 sensors if you need to distinctly identify the specific detector.
If you can utilize a regional approach then here are some more specifics:
Since there are only four alert messages you would need to duplicate the message on two units. Here is an example:
Shed #1 - "alert zone 1"
Shed #2 - "alert zone 2"
Shed #3 - "alert zone 3"
Shed #4 - "alert zone 4"
The fifth shed, since it is hypothetically near shed #4, would have a the same alert message (alert zone 4) as shed #4. Since you won't be able to uniquely identify the actual shed when you hear alert zone 4, you would know the general area that was tripped.
So, if you need to identify which shed's detector was tripped, you would be limited to 4 sensors. If you were OK with the general region that was tripped then you could add more than 4 sensors.
Also how can the portables be charged in a foreign country that uses 240Vac. what voltage does the transformer pack output have to be??
Thanking you
The wall mount power supplies, whether you are referring to the base power supply or the hand held charger, operate on 120 VAC. The output of the base supply is 12 VDC so you could easily convert the base to operate on a battery bank if you use solar, wind, etc (or even vehicular use). You would use the voltage adapters sold at Radio Shack to convert them to 240 VAC if desired.
One caveat, while some countries are lax in their enforcement of unlicensed radio operation, the US is the only country I am aware of that allows for unlicensed operation on MURS frequencies. In other countries those frequencies may be used by the local police or other agencies and they would not be pleased if they were interfered with. One of my customers in Argentina noted that there were two frequencies that these units used that were used by the local police there.
- Rob