Modem – Device for connecting to an analogue phone line to communicate with another
Personal Computer remotely. Used to dial-in to the Gateway for user access and service. Can
also be used to send email alarms via Internet dial-up account.
PST – Precision Semiconductor Technology or Thermistor, a sensor for measuring
temperature.
PT100 – Platinum Resistance Device for measuring temperature.
RF – Radio frequency wireless communications to and from the transmitters and Gateway.
RH – Relative Humidity. The amount of water vapour present in the atmosphere expressed as
a percentage of the maximum that could be present at the same temperature.
Self-Healing – As part of the Meshing technology the system is able to adapt automatically if
one part of the system is damaged, i.e. Radio Contact is lost with part of the Backbone. Only
the leaf transmitters directly connected to the faulty part of the system will be affected with the
rest of the transmitters simply finding alternative routes for the data.
Transmitter – A transmitter is a device connected wirelessly to the system. This device
records data locally from a number of sensors and sends the information back to the Gateway
using RF. A transmitter is powered via battery or mains adaptor.
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