Specifications

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Fig. 2.4: Figure showing Automata’s Mini-SS logger.
This system compares favorably to the desired specifications. It is simple to use and
configure. However, the radio and database requirements fail because the logger has no
inherent support for an automatic multi-node network of loggers or controllers. Although
one can easily setup local measurements, the effort and expertise required to setup a w ir eless
network with data storage/routing management would be a job for a technician, not a
producer. The logger comes with a qu alified enclosure and therefore satisfies the r uggedness
constraint. It s atisfies the power requirement because it uses only 5mA when active and
.2mA when sleeping. However, the system can only operate on battery power for two
months unattended with the standard battery supplied at purchase. This system also fails
the interface requirement. It only has analog sensor interfaces and does not support digital
or SDI-12. The system costs $875 and is therefore on the borderline of the stated cost
requirement.