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Series L4

Rugged and reliable the Series L4 Flotect® Level switch operates automatically to indicate tank level. Perfect for starting or stopping pumps, opening or closing valves, or actuate 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 hangup.

• Leak proof body machined from bar stock
• Choice of floats dependent on maximum pressure and specific gravity
• Weatherproof, designed to meet NEMA 4
• Explosion-proof (listings included in specifications)
• Installs directly and easily into tank with a thredolet or flange (see application drawings)
• 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

Select a link under the "item" tab below to order.

Cat #DescriptionsOption
L4Brass body, side wall mounting
L4SS316SS body, sidewall mounting
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 SAA]
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 0344 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 SAA models: 10A @ 125/250 VAC (V~). CSA models:5A @ 125/250 VAC (V~); 5A res., 3A ind. @ 30 VDC (V ). MV option: 1A @ 125 VAC (V~); 1A res., .5A ind. @ 30 VDC (V ). MT option: 5A @ 125/250 VAC (V~). [MT and MV option not UL, CSA, FM, ATEX or SAA]
Electrical Connections UL and CSA models: 16 AWG, 6˝ (152 mm) long. ATEX and SAA unit: 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
Weight 4 lb 9 oz (2.07 kg)
Dead Band 3/4˝ (19 mm) for standard float
Specific Gravity 0.7 minimum with standard float. For other floats see options
Agency Approvals UL, CSA, FM, CE and ATEX

• 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 waste water/sewage treatment processes.

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