GENERAL FLT
®
Series FlexSwitch
TM
2 Fluid Components International LLC
Application
Flow rate and/or level/interface and temperature sensing in liquid,
gas and slurry applications.
Sensing Element
Process Connection
Model B
Standard: 3/4” male NPT.
Models S and F
Standard: 3/4” male NPT.
Optional: 1” BSP, 1” or 1 1/4” male NPT; flanges, spool pieces,
sanitary fittings or retractable sensing element.
Model L
Standard: 1” male NPT or 3/4” female NPT.
Optional: Flange and low-flow orifice.
Model C
Standard: Sanitary flange
Insertion Length
Model B
Standard: 1.2” [30 mm], 2” [51 mm], 4” [102 mm].
Models S and F
Standard: 1.2” [30 mm], 2” [51 mm], 4” [102 mm], 6” [152 mm], 9”
[229 mm], 12” [305 mm],18” [457 mm].
Optional: Custom-specified lengths.
Model L
Threaded connections: 3.375” [86 mm] in-line body length.
Flanged connections: 12” [305 mm] in-line body length.
Model C
See chart on outline dimensional, Appendix A.
Sensor Wetted Materials
Model B
Standard: 316L stainless steel with all-welded construction.
Models S and F
Standard: 316L stainless steel with all-welded construction.
Optional: Hastelloy C, Monel 400, electro-polished stainless steel
and titanium (FLT93S only). Other spray coatings are available on
special request (i.e., tantalum, chromium carbide, Kynar).
Model L
Standard: 316L stainless steel with all-welded construction.
Optional: Hastelloy C, Monel 400 and titanium.
Model C
Standard: 316L stainless steel with all-welded construction
electro-polished to 20 Ra.
Operating Temperature
All Models
Standard temperature configuration:
-40 °F to +350 °F [-40 °C to +177 °C]
Medium temperature configuration:
-100 °F to +500 °F [-73 °C to +260 °C]
Model S Only
High temperature configuration:
-100 °F to +850 °F [-73 °C to +454 °C]
Operating Pressure (w/NPT Process Connection)
Models S, B, F and L
2350 psig [162 bar(g)] -100 °F to 500 °F [-73 °C to 260 °C]
Models S, B
1450 psig [100 bar(g)] 501 °F to 850 °F [261 °C to 454 °C]
Model C
1500 psig [103 bar(g)] -100 °F to 500 °F [-73 °C to 260 °C]
Higher ratings available with special construction and test certification.
Environmental Conditioning
Indoor or outdoor use.
Maximum Relative Humidity: 100%
Maximum Altitude: 12,000 ft.
Control Circuit (5208)
Configuration
Standard: Plug-in, socket mounted with dual alarm/trip epoxy sealed relays.
Optional: Rack-mount configuration (card cage or enclosure not
included).
Output Signals
Standard: Analog DC voltage related to flow or level/interface signal
and analog DC voltage proportional to temperature.
Input Power
Standard: Field selectable for 120 VAC (108-132 VAC), 13 W 100 mA
maximum; 230 VAC (207-253 VAC), 14 W 50 mA maximum;
24 VDC (21-30 VDC), 7 W, 230 mA maximum or 24 VAC (18-28 VAC),
7 W, 230 mA maximum.
Optional: Low supply voltage operation for applications with line
voltage supplies lower than 108 VAC. Field selectable for 100 VAC
(90-110 VAC), 13 W, 100 mA maximum; 200 VAC (180-220 VAC)
14 W, 50 mA maximum.
All AC power rated at 50-60 Hz.
Power “ON” amber LED provided.
Serviceable Fuse Rating
For the 120/230 VAC input power configuration, there are two
serviceable fuses located on the top side of the control circuit. These
are labeled F1 and F2.
Fuse Specifications
Power: 1.6 amps, 250 VAC, Slo-Blo
®
(time delay)
Package size: TRS (8.5 x 8 mm) radial lead plug-in type
FCI part number: 019933-01
Tyco part number: 37411600410
For the 24 VDC/VAC input power configuration, there is a fuse
located on the bottom side of the control circuit. The replacement of
this fuse requires a qualified technician knowledgeable in SMD, and
RoHS soldering practices.
Fuse Specifications
Power: 1.5 amps, 125 VDC, SLO-BLO
®
(time delay)
Package size: 6.1 x 2.69 mm SMD
FCI part number: 020399-02
Littelfuse part number: 045201.5
Heater Power
Field or factory selected to optimize switching performance and
rangeability and selectable for specific fluid service requirements.
Typical Service Sensing Element Power (W)
Gas or Air S/B-Style 0.75
F-Style 0.25
Liquids S/B-Style 3.0
Technical Specications
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