The FT440 flow computer is a microcontroller-based indicator/transmitter that interface with pulse output flow sensors to compute and display flow rate, flow total, and also generate output signals representing flow. It has two scaled pulse outputs. Galvanic isolation is provided for pulse outputs.
Pulse and 4-20mA analog outputs can be used to signal external devices, e.g. certain metering pumps and water treatment controls. Alternatively, one or more pulse outputs can be configured as alarm outputs. These flow computers can be password protected to prevent resetting the total or changing configuration settings.
Order the FT440 only if a 4-20mA output signal is a requirement, otherwise the FT430 offers the most flexibility.
While the FT430 is DC-powered and the FT450 is battery-powered, the FT440 is loop-powered, meaning that it takes its power from the circuit where the 4-20 mA output signal is being sent. The wall-mounted version can be ordered with a dual power supply (-139 option) running off 120/240 VAC that could power both the 4-20 mA loop and a magmeter, or the single power supply (-140 option) could be ordered when used with mechanical meters only.
Other options available are:
Tamper-Evident Kit ("-32"): A wire with a seal runs through the screws, so that the unit can't be opened without breaking the seal.
Non-Resettable Total ("-64"): Normally, the "Total" display on the unit can be reset to zero with a simple key-press. With this option, that can't be done.
Hinged Display Cover ("-126"): A protective clear cover over the display/keypad. Recommended for all outdoor applications. Incompatible with the "-27" or "-65" power supply options, as these units have a different housing.
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