L500 Series
Custom multi-level float switches for large tanks

The wider displacement L500 Multi-Level Float Switch is designed to monitor up to six levels on a single device. With only a single entry, the L500 can track changing levels within a large tank, as well as monitor liquid interfaces of dissimilar liquids for oil/water separations, chemical emulsions and condensation levels. Probe lengths are available up to 15′ with numerous combinations of floats, mounts and materials to suit every application. Additional options include a variety of enclosures, as well as integrations with thermostatic switches to provide level and temperature sensing capabilities within one control.

Features
Wiring options
Mounting and materials
Float Specifications
Downloads

Modular Design
Probe Lengths Up to 15′
Capable of Up to 6 Switch Positions
50 VA Switch (Standard)
Adjustable & Thermostatic Switch Model Options

Operation is based upon simple buoyancy, whereby a spring is loaded with weighted displacers, which are heavier than the liquid. Immersion of the displacers in the liquid results in buoyancy force changing to net force acting on the spring. The spring compresses as the buoyancy force increases.

A magnetic sleeve is connected to the spring and operates within a non-magnetic barrier tube. Spring movement causes the magnetic sleeve to move into the field of a pivoted magnet, actuating a switch mechanism located outside the barrier tube. Built-in limit stops prevent over stroking of the spring, under level surge conditions.

1/2" NPT	BRASS	SPST 20 VA	NO ENCLOSURE
1" NPT	Polypropylene	SPST 50 VA	Polypropylene NEMA 4
1-1/4" NPT	PVC	SPST 100 VA	Cast Aluminum NEMA 4/7/9
1-1/2" NPT	316 Stainless Steel	SPDT 3 VA	Cast Iron NEMA 4/7/9
2" NPT	Teflon® (PFA)
2" #150 ANSI Flange
3" #150 ANSI Flange
4" #150 ANSI Flange

POLYPROPYLENE (HOLLOW)	1.875" X 1.906"	-40º TO +150º F (-40º TO +65.6º C)	50 PSIG (3.4 BAR)	0.48
316 Stainless Steel	1.5" x 1.3"	-40º to +300º F (-40º to +148.9º C)	120 PSIG (8.3 bar)	0.8
316 Stainless Steel	2" Ball	-40º to +300º F (-40º to +148.9º C)	750 PSIG (51.7 bar)	0.79
Teflon® (Hollow)	2.150" x 1.980"	-40º to +300º F (-40º to +148.9º C)	40 PSIG (2.8 bar)	0.84
Buna-N	1.250" x 1.875"	-40º to +180º F (-40º to +82.2º C)	150 PSIG (10.3 bar)	0.64
Buna-N	1.875" x 1.750"	-40º to +180º F (-40º to +82.2º C)	150 PSIG (10.3 bar)	0.57
PVC (Hollow)	1.875" x 1.906"	-40º to +150º F (-40º to +65.6º C)	50 PSIG (3.4 bar)	0.69