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FR73B BASIC Low Flow FlexSwitch®
Flow Switch Summary
The FR73B BASIC
inline type low flow switch provides a very precise linear output signal
for extremely low gas and liquid flows in either direction. With
detection capability from 1 to 1000 cc/min in gas and 0.01 to 2 cc/min
in liquids, this instrument is an ideal switching device for test and
measurement applications such as gas chromatography and fluid sampling
systems.
This instrument produces a millivolt output signal that is positively
correlated with the flow rate. The signal is suitable for computer
input and can be read using FCI's Model FM71D Monitor/Calibrator or
customer supplied voltmeter.
The FR73B BASIC responds in as little as 1 second depending upon the
type of media and flow velocity. With 0.125 inch 316 stainless steel
tubing and an inlet to outlet volume less than 0.8 cc, the unit is
quickly and easily purged to prevent sample contamination in test
applications.
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Applications |
Sample flow
and gas chromatography |
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Leak detection |
SpecificationsSetpoint Range:
Water-based Liquids:
0.01 to 1.25 cc/min
Hydrocarbon-based Liquids:
0.04 to 2 cc/min
Air/Gas:
1 to 1000 cc/min
Repeatability: 1% of full signal range at constant process
conditions
Response Time: As low as 1 second
Enclosure:
Standard: No circuit board enclosure
Optional:
Epoxy coated feralloy rated for NEMA Type 4X and hazardous locations
Groups B, C, D, E, F and G; CENELEC EEx d IIC and CE Mark (meets IP66)
Agency Approvals: Contact FCI.
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Flow Element
Materials of Construction: All wetted surfaces 316 stainless
steel with nickel braze per process specification AMS 4777
Process Connections: 0.125 inch tubing, 2 inches [50 mm] length
with 0.028 inch [0.7 mm] wall thickness
Inline Length: 7 ± 0.25 inches [178 ± 6 mm]
Operating Temperature: -100° to +350° F [-73° to +177° C]
Operating Pressure: To 1000 psig [69 bar(g)]
Interconnecting Cable: 10 feet [3 m] Teflon
Control CircuitOperation Temperature: -40° to +140° F
[-40° to +60° C]
Input Power: 115 ± 15 Vac or 230 ± 30 Vac, 50/60 Hz, 22 to 30 Vdc;
6 watts maximum
Relay Contacts: SPDT rated 2 amps at 115 Vac and 24 Vdc or 1 amp
at 230 Vac, plus millivolt output ± 500 mV 10 megaohm minimum input
impedance
Dimensions: 3.6 inches [92 mm] diameter, 2.4 inches [61 mm]
height |
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