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Seametrics Blind Analog Transmitter (AO55)

Your Price :
$486.34 – $520.74

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  • Mount: Wall mount
  • Power: Loop powered
  • Input: Open-collector solid state sensor input
  • Connector: Available with connector for LMI pump
  • Weight: 3 lbs
  • Features:
    • Loop powered - takes its power from the device it's connected to
    • Smooth output signal
    • Easy to set up
    • Durable
  • Applications:
    • Telemetry/SCADA
    • Distributed control systems
    • Programmable controllers
    • Chart recording
    • Data logging
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General Description

The AO55 is a blind transmitter, meaning that it has no display. It can be used with almost all Seametrics flow sensors. It takes the variable frequency pulse input from the flow sensor and converts it into a 4-20mA output signal. Power is taken from the analog device that it is connected to. The digital design makes it possible to span the unit in the field without tools. The frequency at which 20 mA is desired is entered on a set of rotary switches, and an internal microcontroller automatically scales all other values accordingly. An additional benefit of the microcontroller is its ability to average inputs, for smoothing of the output signal. The degree of averaging can be selected in the field, from 2 to 16 seconds.

The AO55 is available either as a wall-mount unit here, or pre-mounted on an insertion meter.

For maximum environmental protection, the electronic components are encased in a special semi-flexible urethane potting material. The fuse-coated cast aluminum clamshell housing is provided with mounting feet (or connected directly to the flow sensor for the insertion meters).

The AO55 will operate on a relatively wide range of current loop voltages, 24 to 36 VDC. Lower voltages limit the load that can be applied to the loop without distortion of the signal. (See Load/Supply chart in the Specifications under the Download tab if there is a question regarding voltage vs. load.) A built-in power regulator supplies the appropriate power to the flow sensor.

Further Information

See Downloads tab.


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