Small Size - Engineered Plastics LS-3 Series - Offers High Reliability, Compact Size and Low Costs in NPT, Straight and Metric Threads Ideal for shallow tanks or restricted spaces, or for any low-cost, high volume use. LS-3 Series are available in FDA compliant materials, consult GEMS for details. LEVEL SWITCHES - SINGLE POINT Polysulfone Float Polypropylene Float (Hollow) Polypropylene Float (Solid) For water based liquids, with limited use in oils and chemicals. Features a low specific gravity float offering broad chemical compatibility. With Polypropylene stem and float, switch offers broad chemical compatibility. Buna N Float ALL-PVDF New 3/4 Polypropylene Float FDA FDA Wetted materials of construction comply with FDA food contact regulations. Ideal for oils and fuels. Stem and float of corrosionresistant PVDF for ultra-pure applications. See next page for details. Common Specifications Approvals: U.L. Recognized - File No. E45168; CSA Listed - File No. 30200. CE Declaration Available Upon Request. NSF materials are Standard 61 compliant. For NSF approved level switches contact Gems. Switch SPST: 20 VA, 120-240 VAC. Units are shipped N.O. unless otherwise specified. Selectable, N.O. or N.C., by inverting float on unit stem. Dimensions - 1 Float Models only Alternate Mountings 3/8-16 Straight Thread 1/8 NPT 17/32 (13.4 mm) 2-3/32 (53.2 mm) 1/2 HEX L1 1-9/16 (39.7 mm) M12x 1.75 Straight Thread 3/8 - 16 L1= Actuation Level (see chart below)1/2 HEX .390 REF. (9.9mm) .14 (2.6mm) 1 (25.4 mm) 1 DIA (25.4 mm) A-2 G1/8 1/8-28 BSP Electrical Termination 1/2 HEX Lead Wires Visit www.GemsSensors.com for most current information. .475 REF. (12mm) .315 REF. (8.0mm) 9/16 HEX .14 (3.6mm) Cable 5/8 HEX .20 (5.1mm) Cable FLOAT TYPE Stem and Mounting Material Float Material Float Dia. Actuation Level1 Polysulfone Polysulfone 1 3/4 (19.0 mm) Polypropylene2 Polypropylene (Hollow) Polypropylene3 NSF Std. C-2 (Kynar float retaining clip) Polypropylene3 (Hollow) NSF Std. C-2 Polypropylene2 Nylon PVDF Polypropylene (Solid) 1 1 13/16 (20.6 mm) .75 .60 .60 50 psi (3 bar) 50 psi (3 bar) 50 psi (3 bar) 150 psi (10 bar) @ 68F (20C) Operating Temperature Mounting Type Electrical Termination Part Number -40F to +225F (-40C to +107C) 1/8 NPT Lead Wires 42295 1/8 NPT 3/8-16 G 1/8-28 M12x1.75 Lead Wires Lead Wires Cable Cable 142505 171517 171518 189739 1/8 NPT Lead Wires 209475 3/8-16 Lead Wires 209455 G 1/8-28 Lead Wires 209460 M12x1.75 Lead Wires -40F to +150F (-40C to +66C) 1/8 NPT 3/8-16 Lead Wires Lead Wires 209465 116826 171514 -40F to +176F (-40C to +80C) M12x1.75 Cable 189787 -40F to +212F (-40C to +100C) 1/8 NPT Lead Wires or Cable 201540 -40F to +250F (oil) (-40C to +121C [oil]) 1/8 NPT Lead Wires 162745 -40F to +176F (water) (-40C to +80C [water]) M12x1.75 Cable 189786 -40F to +225F (-40C to +107C) -40F to +176F (-40C to +80C) -40F to +225F (-40C to +107C) 9/16 (14.3 mm) .90 3/4 7/16 (11.1 mm) .95 Atmospheric 1 13/16 (20.6 mm) .45 150 psi (10 bar) 3/4 11/16 (17.5mm) .85 150 psi (10.3 bar) -40F to +250F (oil) (-40C to +121C [oil]) 1/8 NPT Lead Wire 177818 1 1/2 (12.7 mm) .86 50 psi (3 bar) -40F to +250F (-40C to +121C) 1/8 NPT Teflon Jacketed Lead Wires 173250 1 Buna PVDF 13/16 (20.6 mm) Min. Liquid Pressure Max. Sp. Gravity @ 70F (21C) LEVEL SWITCHES - SINGLE POINT How To Order - Select Part Number based on specifications required. - Stock Items. Notes: 1. Based on a liquid specific gravity of 1.0. 2. All Polypropylene units carry a Kynar retaining clip. Accessories Available in OEM Quantities: Jam Nut, Gaskets, and Slosh Shields. 3. NSF C-2 Approved unit, for water use only. 3/4 Diameter Floats for Tiny Tanks Our smallest LS-3 yet! Reliable alternative to more expensive electronic sensors. Fits smaller devices. Less material, lower cost. Proprietary float more buoyant than competitors. Small yes, but with BIG performance. No other 3/4 float switch on the market matches our LS-3 specs. These units are ideal for potable water, medical devices and other compact appliances, such as printers. Gems proprietary float enables use in lighter-than-water fluids. NSF/ FDA compliant models available at your request. Please consult factory. Specifications Wetted Material Stem and Mounting P/N 201540 P/N 177818 Float P/N 201540 P/N 177818 Operating Temperature, Max. P/N 201540 P/N 177818 Pressure, Max. P/N 201540 P/N 177818 Actual Size Dimensions 17/32 (13.4 mm) Polypropylene with Kynar retaining clip Nylon Polypropylene Buna-N 1/8 NPT 1/2 HEX L1 2-3/32 (53.2 mm) 1-9/16 (39.7 mm) 1 (25.4 mm) 212F (100C) 250F (121C) oil, -40F to +176F (-40C to +80C) Atmospheric 150 psi (10.3 bar) 3/4 DIA (19 mm) L1= A ctuation Level (see chart above) Order by Part Numbers: LS-3, 3/4 Polypropylene Float: 201540 LS-3, 3/4 Buna-N Float: 177818 Visit www.GemsSensors.com for most current information. A-3 Unique Features Make These LS-3 Models Special These small switches feature unique configurations for special applications. Part No. 142545 With Slosh Shield LEVEL SWITCHES - SINGLE POINT Part No. 46999 Bottle Level Part No. 76707 For Low Level For external mounting on tanks too small to accommodate internally mounted switches. (See note below) For detecting levels as low as 5/8 from tank bottom. Use in water, some oils and chemicals. Cut-away version shown Compact, allpolypropylene switch with slosh shield is ideal for use with turbulent liquids in small tanks. FDA compliant materials. 3/8-24 NPSM THD. 3/8-24 NPSM THD. 1/81/8 NPTNPT 17/32 17/32 (13.4 mm) (13.4 mm) 1/81/8 NPTNPT (3.2(3.2 mm) mm) 25/64 25/64 (10(10 mm) mm) STEM 1/21/2 HEXHEX (12.7 mm) (12.7 mm) FLOAT 3-15/32 3-15/32 (88.1 mm) (88.1 mm) 9/16 9/16 2-3/32 2-3/32 (14.3 mm) (14.3 mm) (53.2 mm) (53.2 mm) 1-13/16 1-13/16 2.09 2.09 ACTUATION (46.1 mm) L1=3/4" mm) (53.1 mm) LEVEL (46.1 mm) (53.1 3 1/2" REF. 1/21/2 HEXHEX (13(13 mm) mm) 1-15/32 1-15/32 (37.3 mm) (37.3 mm) 15/16 15/16 (23.8 mm) (23.8 mm) 1-9/16 1-9/16 (39.7 mm) (39.7 mm) 1/41/4 NPTNPT 1-1/4 DIA.DIA. 1-1/4 (31.7 mm) (31.7 mm) Order By Part Number 1/8"-27 NPSM TH'D 1-1/4 1-1/4 (31.7 mm) (31.7 mm) 1/4" NPT REF. (2) PLACES 1 9/16" DIA. REF. 1-9/16 DIA.DIA. 1-9/16 (39.6 mm) (39.6 mm) #22 AWG WIRE, POLYMERIC 72"-78" EXT. 1/41/4 NPT NPT 0.250 0.250 (6.4(6.4 mm) mm) 1.86 DIA.DIA. 1.86 (47.4 mm) (47.4 mm) 142545 46999 76707 All Polypropylene (Including Shield4) Polysulfone All Polysulfone (Including Collar) Polypropylene (Solid) Polysulfone Buna N -- Brass, Aluminum, Polycarbonate, Viton A Epoxy Materials Stem and Mounting Float Other Wetted Min. Liquid Sp. Gr. Operating Temperature Pressure, PSI, Max.3 Switch1, SPST Electrical Termination .90 .75 -- -40F to +150F (-40C to +65.6C) -40F to +120F (-40C to +48.9C) -40F to +180F (-40C to +82.2C) 150 50 20 VA, N.C./N.O. Dry2 20 VA, N.C. Dry No. 22 AWG, 22 L., PVC Lead Wires Notes: 1. See "Electrical Data" on Page X-5 for more information. 2. Switch operation is selectable, N.O. or N.C., by inverting the float on the unit stem. 3. Maximum pressure at 70F (21C). 4. Consult factory for other available materials. L1= Switch actuation level, nominal (based on a specific gravity of 1.0). A-4 No. 22 AWG, 72 L., Polymeric Lead Wires No. 22 AWG, 72 L., PVC Lead Wires Note: LS-3 Series Bottle Level Switch is also available with any of the float materials shown on opposite page. Contact GEMS for correct part number. - Stock Items. Visit www.GemsSensors.com for most current information.