Magnetically Operated Switch, Leak Proof Body, Explosion-Proof

Rugged and reliable the SERIES L4 Flotect® Float Switch operates automatically to indicate tank level. Perfect for starting or stopping pumps, opening or closing valves, or actuating level alarm signals. A unique magnetically actuated switching design gives superior performance. There are no bellows, springs, or seals to fail. Instead, the free-swinging float attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm. Float arm hinge design limits the arm angle to prevent vertical hang up.

Product Applications

Direct pump control for maintaining level
Automatic tank dump operations
Control levels or provide alarms in sumps, scrubber systems, hydro-pneumatic tanks, low pressure boilers, and various water/wastewater treatment processes
Level control
Valve control

More Information

Model Chart

EXAMPLE	L4	SS-D-TOP	50	B1HC	Series L4-SS-D-TOP-50-B1HC Flotect® Float Switch, 316 SS body, DPDT, top mounted housing, 50 psi - 2-1/2" spherical float, with 2" hex type carbon steel bushing.
SERIES	L4				Flotect® Float Switch
1ST SET OF OPTIONS (Select any or all)		SS D TOP			316SS Body (430 Magnet Keeper) DPDT Top Mounted Housing
2ND SET OF OPTIONS			50 150 300 316 AT BSPT CI EPOXY IEC MT MV NH NI ST TBC TRD TRI W		50 psi, 2-1/2" Spherical Float 150 psi, 2-1/2" Spherical Float 300 psi, 2-1/2" Spherical Float All 316SS Wetted Parts ATEX Approval BSPT Process Connection, M25 Conduit Cast Iron Housing Epoxy Coated Housing IECEX Approval High Temperature Gold Contacts No Housing Nickel 200 Vane/Vane Block Stainless Steel Tag Terminal Block Connection Time Delay Relay, Decreasing Flow Time Delay Relay, Increasing Flow Weld SST Threaded Flange or Bushing to SST Body
FLANGES/BUSHINGS				B1FC B1HB B1HC B1H4 B1HS B2FC B2F4 B2HC B2H4 B2HS B2HB B4HS F2C1 F2C3 F2C6 F2C9 F3C1 F3C3 F2S1 F2S3 F2S6 F3S1 F3S3 F4C1 F4C3 F4S1 F4S3	2" Flush Type Carbon Steel Bushing 2" Hex Type Brass Bushing 2" Hex Type Carbon Steel Bushing 2" Hex Type 304SS Bushing 2" Hex Type 316SS Bushing 2-1/2" Flush Type Carbon Steel Bushing 2-1/2" Flush Type 304SS Bushing 2-1/2" Hex Type Carbon Steel Bushing 2-1/2" Hex Type 304SS Bushing 2-1/2" Hex Type 316SS Bushing 2-1/2" Hex Type Brass Bushing 4" Hex Type 316SS Bushing 2" Carbon Steel 150# Flange 2" Carbon Steel 300# Flange 2" Carbon Steel 600# Flange 2" Carbon Steel 900# Flange 3" Carbon Steel 150# Flange 3" Carbon Steel 300# Flange 2" 316SS 150# Flange 2" 316SS 300# Flange 2" 316SS 600# Flange 3" 316SS 150# Flange 3" 316SS 300# Flange 4" Carbon Steel 150# Flange 4" Carbon Steel 300# Flange 4" 316SS 150# Flange 4" 316SS 300# Flange

Specifications

Service: Liquids compatible with wetted materials.
Wetted Materials: Float and Rod: 316 SS; Body: Brass or 316 SS standard; Magnet Keeper: 430 SS standard, 316 SS or nickel optional.
Temperature Limits: 4 to 275°F (-20 to 135°C) standard, MT high temperature option 400°F (205°C) [MT option not UL, CSA, ATEX or IECEx]. ATEX and IECEx options: Ambient temperature -4 to 163°F (-20 to 73°C); Process temperature -4 to 163°F (-20 to 73°C).
Pressure Limit: Brass body 1000 psig (69 bar), 316 SS body 2000 psig (138 bar). Standard float rated 100 psig (6.9 bar). For other floats, see options.
Enclosure Rating: Weatherproof and explosion-proof. Listed with UL and CSA for Class I, Groups C and D; Class II, Groups E, F, and G. ATEX CE 0344 EX II 2 G EEx d IIB T6 -20°C≤Tamb≤75°C, EC-Type Certificate No: KEMA 03 ATEX 2383. SAA: Exd II C T6 (T amb=60°C). IP66 C1 I, Zone I. Also FM approved.
Switch Type: SPDT snap switch standard, DPDT snap switch optional.
Electrical Rating: UL, FM, ATEX and IECEx models: 10 A @ 125/250 VAC (V~). CSA models: 5 A @ 125/250 VAC (V~); 5 A res., 3 A ind. @ 30 VDC. MV option: 1 A @ 125 VAC (V~); 1 A res., .5 A ind. @ 30 VDC. MT option: 5 A @ 125/250 VAC (V~). [MT and MV option not UL, CSA, FM, ATEX or IECEx]
Electrical Connection: UL and CSA models: 16 AWG, 6" (152 mm) long. ATEX and IECEx units: terminal block.
Process Connection: 1-1/2" male NPT standard, 2-1/2" male NPT required for optional floats.
Mounting Orientation: Horizontal installation standard, optional vertical top mount.
Deadband: 3/4" (19 mm) for standard float.
Specific Gravity: 0.7 minimum with standard float. For other floats see Options/Accessories page.
Weight: 4 lb 9 oz (2.07 kg).
Agency Approvals: ATEX, CE, CSA, FM, IECEx, UL**.
: **No Housing Option (-NH) has no approvals.

Features

Leak proof body machined from bar stock
Choice of floats dependant on maximum pressure and specific gravity
Weatherproof, designed to meet NEMA 4
Explosion-proof
Installs directly and easily into tank with a threaded branch connection or flange
Electrical assembly can be easily replaced without removing the unit from the installation so that the process does not have to be shut down
Horizontal installation or optional top mount vertical installation
Unique magnetically actuated switching design gives superior performance
No bellows, springs, or seals to fail
Free-swinging float attracts a magnet within the solid metal switch body, actuating a snap switch by means of a simple lever arm
Float arm hinge design limits the arm angle to prevent vertical hang up

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Series L4 FLOTECT® Float Switch

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