If the alarms were integral to the transmitter, then the overall cost would be higher and many users would buy a function they do not want. There are also several features that result from the alarm being a separate module:
- Modularity allows several alarm units to operate off of one signal source.
- The alarm is able to directly operate small motors and valves, eliminating the need to link up with a PLC or DCS. Only the iT Alarm uses power relays with the capacity to switch 250 VAC, 8A-resistive or 1/3HP inductive machines.
- Having the alarm as a separate unit allows using it with an LPS® 4-20mA vibration sensor or any 4-20mA sensor such as temperature, pressure, level, flow, force or speed.