Level Switch Model L-40

Compact Level Switch

Side and Top Mount (Horizontal or Vertical)

Corrosion-resistant plastic with optional metal pivot pin (available in 316 stainless steel, HASTELLOY® C, Titanium, or Teflon® or PTFE).

10 times less sensitive to deposits or build-up of contaminants than sliding float Level Switches.

Each unit can be supplied with a special made to order 1 1/4” x 1/4” x 1/2” reducer bushing for through wall mounting.

Output wire 2 foot of 22 gauge twisted pair.

STANDARD: SPST reed switch for 120/240VAC 50 Watt power or DC dry circuit for computer/PLC interface.

CONNECTION: 2 foot of 22 gauge twisted pair wire (custom lengths available)

Working Fluid Specific Gravity

Top Mount: 0.8 | Side Mount: 0.7

Working Temp

0˚–200˚F (-18˚–93˚C)

Working Pressure

250 psi (1.724 MPa)

Process Connection

1/4" NPT (1 1/4" Bushing Included)

Electrical Switch

SPNO (single pole normally open) or SPNC (single pole normally closed), 0.5A

Enclosure

NEMA 6P / IP 67

Uses
Models
Specs
Diagram
Compatible Chemicals

Uses

Water Level Control in:

Cooling Towers
Plating Tanks
Washing Tanks
Reverse Osmosis
Fish Farms
Fountains & Pools
Aquariums

Models

L-40N (NORYL®)

WORKING FLUID SPECIFIC GRAVITY:

Top Mount: 0.8 Side Mount: 0.7

WORKING PRESSURE: 200 psi max. continuous

WORKING TEMPERATURE: 180˚F max. continuous.

WETTED MATERIALS: Body, Float and Bushing: Noryl® (PPO) (10% glass fibers) Pivot Pin: 316 stainless steel

L-40VCR (FORTRON®)

WORKING FLUID SPECIFIC GRAVITY:

Top Mount: 0.9 Side Mount: 0.7

WORKING PRESSURE: 200 psi max. continuous

WORKING TEMPERATURE: 200˚F max. continuous.

WETTED MATERIALS: Body, Float and Bushing: Fortron® (PPS) (40% glass fibers) Pivot Pin: HASTELLOY® C

L40 Group
	L-40N	L-40N/SG/NO	L-40VCR/NO	L-40VCRSG/SPDT
	L-40N/NC	L-40N/SG/SPDT	L-40VCR/SG
	L-40N/NO	L-40N/SPDT	L-40VCR/SG/NC
	L-40N/SG	L-40VCR	L-40VCR/SG/NO
	L-40N/SG/NC	L-40VCR/SPDT	L-40VCR/NC

Specs

ELECTRICAL (REED) SWITCH CHARACTERISTICS
SPNO (single pole normally open)

Contact Ratings:

AC Voltage (max. switching) 300VAC

DC Voltage (max. switching) 350VDC

Current (max. switching) 0.5A

Current (max. carrying) 2.5A

Power (max) (VA, W) 50 watts

Contact resistance (max. initial) 0.15 ohms

Insulation resistance 1010 ohms

Operating temperature -40°F–240°F (-40°C–115°C)

OPTIONAL: SPNC or SPDT, 3 watt, 100VAC/VDC.

HYSTERESIS (Δ LIQUID LEVEL TO ACTIVATE/DEACTIVATE SWITCH)
≈ 3/8” (0.375″) max. travel

INDUCTIVE LOADS

Switch contacts have been tested with small relays and 30A J-C relay inductive driving coils at 120/240VAC to 500,000 operations without failure. Steady state driving coil Volt/Amp rating should be 8VA or less.

DRY CIRCUIT OPERATION

Switch can interface with microprocessor based controllers and related computer circuits.

NOTE: Model L-40 employs magnetic coupling between float arm and switch body. Magnetic particles can accumulate on and around magnetic housing which may affect proper operation. Please conduct appropriate fluid magnetic particle evaluation and operational tests prior to and during installation and use.

Diagram

Compatible Chemicals

L-40N

Acetic Acid
Ammonia Liquid 10%
Chlorinated Water (Potable)
Ethylene Glycol
Glycolic acid
Hydrochloric acid 20% – 37%
Hydrofluoric acid 20%
Hydrogen Sulfide Aqueous
Mineral Oil
Nitric Acid 10%-50%
Phosphoric Acid 40%-100%
Plating Fluids & Baths
Sodium Hydroxide Solution 20%
Soy Sause
Sulfuric Acid 10%
Vinegar
Water Distilled
Water Fresh
Water Mine Acid
Water Salt
Whiskey & Wine

L-40VCR

Acetic Acid
Ammonia Liquid 10%
Benzene
Diesel Fuel
Ethylene Chloride
Ethylene Dichloride
Ethylene Glycol
Glycolic acid
Hydrogen Sulfide Aqueous
Lubricants
Mineral Oil
Phosphoric Acid 40%-100%
Propylene Glycol
Sodium Hydroxide Solution 20%
Sulfuric Acid 10%
Water Distilled
Water Fresh
Water Mine Acid
Water Salt
Xylene