[pm-h] Remote Temperature Monitoring

[Mike Flannigan]

On 10/1/2010 4:53 PM, Russell L. Harris wrote:
>
> Check out the catalogue of a broadcast supplier such as www.bswusa.com
> or www.fullcompass.com.
>
> Radio stations have utilized the telephone line for remote monitoring
> and control of remote transmitter sites for many years.  Parameters
> monitored include temperature, line voltage, etc.  There even is a
> highly-reliable spark/flame detector, which is needed because of the
> high voltages within the transmitter.  In recent years, in order to
> reduce costs, stations have been moving away from the telephone line
> to the Internet
>
> The transition from monitoring via a telephone-line to monitoring via
> the Internet recently has brought to market inexpensive Internet
> "monitoring appliances".  After using a computer to set up ip
> addresses, reporting interval, etc., simply connect your
> thermocouple/rtd and your sensor contacts to a terminal strip, and
> plug in the power supply and the ethernet cable.
>
> There is a rather large market, and radio stations are notorious for
> being niggardly in allocating funds for maintenance, so the component
> prices are surprisingly low.  I seem to recall seeing one of the
> appliances priced in the range of two to three hundred bucks.
>
> RLH

That first site does have some interesting equipment.
It would be good to get this done without a computer,
but you sure get a lot of flexibility by using an old
computer.


Mike