Seametrics FT420 Data sheet
FT400-SERIES
Rate/Total Indicator
FEATURES
• Simple Setup
• Battery (FT415) or Loop Powered (FT420)
• Remote or Flow Sensor Mounted Indicator
• Rugged Metallic Housing
• Non-volatile Memory
APPLICATIONS
• Water Treatment
• Water Utility
• Industrial Chemical Handling
FT420
GENERAL INFORMATION
The FT400-Series flow computers are microcontroller-based
indicator/transmitters that display flow rate and total and
provide output signals. The FT415 is battery-powered and
provides a scalable pulse output. The FT420 is powered by
external DC voltage and has both pulse and 4-20 mA analog
outputs. When the FT420 is being used in the 4-20 mA mode,
it is a “two-wire” or “loop-powered” device, meaning that the
4-20 mA output signal doubles as its power supply.
The addition of a dual-relay output board (FT420 only) allows
for certain applications requiring contact output isolation
(e.g., certain metering pumps and water treatment controls).
Dual solid state relays provide exactly the same pulse output as the standard unit, and each can signal one external
device. A non-resettable total is also available. The FT420
can be ordered in a plastic enclosure with a 115 Vac power
supply for use with mechanical meters, or with a built-in 115
Vac/12-24 Vdc dual power supply for magmeters.
FT415
Both the FT415 and the FT420 can be factory-mounted on
the meter (-M) or remotely wall mounted with the brackets
provided (-W). The FT420 is also available as a panel mount
(-P) with an open back for easy installation in the user’s own
electrical enclosure. Most FT400’s can be converted from
wall-to-meter or meter-to-wall mount configurations after
installation if needed.
Housings for the -W and -M models are rugged cast aluminum, potted and gasketed for maximum environmental
protection. A membrane keypad allows settings to be
changed without removing the cover. (Password protection,
a standard feature, can be used to prevent settings from
being changed.)
FEATURES
FT400-SERIES
Rate/Total Indicator
Display
Electronics Module
Setup Keys**
Cover Screws
Lower Housing
Strain Relief
Wall-Mount Brackets
**Includes password protection for tamper prevention when needed
SPECIFICATIONS*
Power
Display Rate
Total
Outputs Current Sinking Pulse
Analog
Pulse Output Range
Input
Input Range
K-Factor Range
Flow Alarm Output Range
Operating Temperature
Environmental
Regulatory
*Specifications subject to change • Please consult our website for current data (www.seametrics.com).
FT415 FT420
Lithium "C", 3.6 Vdc, replaceable, 3-5 year life
6-digit autorange, 1/2" character height
8-digit, 5/16" character height
Scaled Pulse output (0.1 sec duration 6.1 Hz max) (or High Alarm output or Low Alarm output on FT420 only)
Sensor pass-through Pulse output (unscaled)
None
0.1 - 9999999.9 units/pulse
Micropower GMR Sensor (square wave)
1.0 - 150 pulses/second
.001 - 99999.999
.01 - 999999.99
-30˚ to 65˚ C (-22˚ to 148˚ F)
NEMA 4X, IP66
None
12-30 Vdc, 4mA (4-20 mA when loop-powered)
6-digit autorange, 1/2" character height
8-digit, 5/16" character height
4-20 mA loop; 24-30 Vdc
0.1 - 9999999.9 units/pulse
5V pulse or contact closure
1.0 - 1,500 pulses/second
.001 - 99999.999
.01 - 999999.99
-30˚ to 65˚ C (-22˚ to 148˚ F)
NEMA 4X, IP66
Mark
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