Small Size- Alloys Rugged Durability, With Broad Heat and Pressure Capabilities, are Hallmarks of These Compact Switches Ideal for shallow tanks or restricted spaces, or for low-cost, high volume use. LEVEL SWITCHES - SINGLE POINT LS-1700 Series - Buna N Float LS-1700 Series - Teflon(R) Float LS-1750 Series - All Stainless Steel Offer broad chemical compatibility for general purpose use. Also ideal for oils and water. Rugged construction suitable for most corrosive liquids, and for high temperatures and pressures. Stainless steel is generally recognized as safe (GRAS) with FDA for food contact regulations. Dimensions LS-1700 Series LS-1750 Series Teflon(R) Float Buna N Float 1/2" HEX (12.7 mm) L1 1-1/2" (38.1 mm) 3/4" (19.1 mm) 1" (25.4 mm) 1-1/2" (38.1mm) 1" DIA. (25.4 mm) 1/2" HEX (12.7 mm) 2-21/64" (59.1mm) 2-1/16" L1 (52.4 mm) 1-1/2" (38.1mm) FLAT WASHER L1= 9/16 (14.2 mm) N.O.; 13/16 (20.6 mm) N.C. 1/2" HEX (12.7 mm) SPRING L1 1" DIA. (25.4 mm) 1/8" NPT 1/8" NPT 1/2" HEX (12.7 mm) 2-1/16" (52.4mm) 1" (25.4 mm) LS-1755 Series Stainless Steel Float and Stem 1/8" NPT 1/8" NPT 2-1/16" (52.4 mm) LS-1755 Series - All Stainless Steel 1-7/32" (31.0 mm) 1-45/64" (42.8mm) 1-1/32" DIA. (26.2 mm) 1-1/2" DIA. (38.1 mm) L1= 1/2 (12.7 mm) N.O. and N.C. L1 L1= 5/8 (15.7 mm) N.O.; 3/4 (19.1 mm) N.C. L1= 37/64 (14.5 mm) N.O.; 53/64 (20.8 mm) N.C. L1= Switch actuation level, nominal (based on a liquid specific gravity of 1.0). Common Specifications Electrical Termination: No. 22 AWG, 24 L., Polymeric Lead Wires, (except Part No. 79990 which has Teflon(R) Lead Wires). Approvals: Series Nos. LS-1700, LS-1750 and LS-1755 are U.L. Recognized - File No. E45168 and CSA Listed - File No. 30200. Switch Operation: Units are shipped N.O. unless otherwise specified. Selectable, N.O. or N.C., by inverting float on unit stem (except for LS-1700 Series switches with Teflon(R) Floats; see selection in "How to Order" table). How To Order - Select Part Number based on specifications required. Material Series Number Stem and Mounting Brass LS-1700 316 S.S. Float Buna N Other Wetted 316 S.S., Epoxy Min. Liquid Sp. Gr. Operating Temperature Pressure, PSI, Max.** .45 Water: to 180F (82.2C) Oil: -40F to +300F (-40C to +149C) 300 .85 -40F to +250F (-40C to +121.1C) 1000 316 S.S. Teflon(R) LS-1750 316 S.S. 316 S.S. 316 S.S. .70 LS-1755 316 S.S. 316 S.S. 316 S.S. .90 -40F to +300F (-40C to +148.9C) -40F to +480F (-40C to +204.4C) -40F to +300F (-40C to +148.9C) * See "Electrical Data" on Page X-5 for more information. ** Higher pressures are temperature dependent. A-10 Visit www.GemsSensors.com for most current information. 100 275 Switch* SPST Part Number 20 VA 01701 20 VA 01702 20 VA, N.O. 26791 20 VA, N.C. 27980 20 VA 01750 20 VA 79990 20 VA 01755