LEVEL SWITCH ALL PRODUCTS IN STOCK FOR IMMEDIATE SHIPMENT! Level Switch Selection Guide Click Below for Our Selection Profile Forms: Model 4000 Styles 1, 2, 3, 4, 10, 11 • Model 4000 Styles 5, 6, 7, 8 & 9 Standard Product Selection Guide More Details Style 1, Style 2, Style 3, Style 4 Style 10 Style 11 Style 5, Style 6, Style 7, Style 8, Style 9 Stern & Mounting Material Brass, Bronze, Stainless Steel, or PVC Float Material Polysulfone, BUNA, Stainless Steel, Polypropylene, or PVC Polysulfone, BUNA, Stainless Steel, Polypropylene Advantages Installs from inside or outside of tanks. Top or bottom, variety of mountings. External tank mounting to side of tank. Side of tank mounting. Installs from inside or outside of tanks. Top or bottom, variety of mountings. Mounting Sizes 1/2”, 1-1/4”, 2” NPT and 3” 150# ANSI flange. Port size 1” NPT. 2”, 3” or 4” 150# ANSI flange. 1/8”, 3/4”, 1” NPT and 3-5/8”diameter flange. Stem Diameter   1/2” Diameter 5/16” Diameter Reed Switch         20 VA SPST     20-100 VA SPST or 20 VA SPDT  Switch Points 1 to 6 1 to 5 Operating Temperatures -40°F to +300°F (Depending on style specified.) Operating Pressure 750 PSIG (Depending on float specified.)      Notes Complement of outlined switches is to show standard product line breath. Our in-house manufacturing capabilities can customize and unit to suit     back to top Standard Product Selection Guide More Details 4000 Adj. 3700 3900 4100 Stern & Mounting Material Brass, Bronze, Stainless Steel, or PVC Brass, Bronze, Stainless Steel Float Material Polysulfone, BUNA, Stainless Steel, Polypropylene Stainless Steel Advantages Adjustable stem. Customer can raise entire stem to position. External tank mounting to side tank. Side tank mounting for use in contaminated and viscous fluids Side tank mounting, high pressure. Replacement parts available. Mounting Sizes Any Model 4000 metal construction. Port size 1” NPT. 1/8” NPT 1” NPT Stem Diameter 5/16” and 1/2” Diameter N/A Reed Switch 20 VA SPST 20-100 VA SPST or 20 VA SPDT 20 VA SPST 20 VA SPDT Switch Points 1 to 6 N/A Operating Temperatures -40°F to +300°F Operating Pressure 750 PSIG 900 PSI Max. 50 PSI Max. Depending on float specified. 150 PSI Max.  Notes Complement of outlined switches is to show standard product line breath. Our in-house manufacturing capabilities can customize and unit to suit     back to top Standard Product Selection Guide More Details 4400 4900 3800 5100 Stern & Mounting Material Polysulfone Polypropylene Brass or SST PVC Brass or Stainless Steel Float Material BUNA, Stainless Steel, Polysulfone Polypropylene Stainless Steel Advantages Side tank mounting, economical, FDA approved material, conduit connector. Side tank mounting, high pressure, variable length stems. Lays at the bottom of tank or double wall containment system. Side of tank indicator, use in hazardous locations, non-electrical, 2 color flag, (red & green) Mounting Sizes 1/2” NPT , 1/2”-13 or 5/8”-11 Bulkhead & Nut 1/8” NPT or 3/8”-24 Bulkhead & Nut N/A 3/4” NPT Reed Switch 20 VA SPST 10 VA SPST N/A Operating Temperatures -40°F to +225°F Depending on float specified. -40°F to +300°F Max. -30°F to 140°F -40°F to +225°F Operating Pressure Depending on float specified. 150 PSI Max. Depending on float specified. 400 PSI Max. 50 PSI Max. 400 PSI Max.  Notes Complement of outlined switches is to show standard product line breath. Our in-house manufacturing capabilities can customize and unit to suit     back to top Standard Product Selection Guide More Details 4200 4200, 4200H 4500 4600 Stern & Mounting Material Polysulfone of Polypropylene Brass or SST Float Material 4200 BUNA or SST 4200H SST BUNA Advantages OEM large volume use, fluted stem Compact, hazardous locations Compatible with fuel, oil, etc. Silicone potted. Shock & vibration resistant. Float interfacing High pressure, hazardous locations, silicone potted, shock & vibration resistant Mounting Sizes 1/8” NPT or 3/8” Bulkhead 1/8” NPT. 1/4” NPT. Reed Switch 20 VA SPST, 100 VA SPST,    20 VA SPST 20 VA SPST, 100 VA SPST, 20 VA SPDT,    20 VA SPST Hazardous Locations N/A 4200H Class I Div. I Groups C & D Class I Div. 2 Groups A, B, C & D N/A Operating Temperatures -40°F to +225°F Depending on float specified. -40°F to +300°F -40°F to +230°F (Depending on media.) Operating Pressure Depending on float specified. 100 PSI Max. Depending on float specified. 400 PSI Max. 150 PSI Max.  Notes Complement of outlined switches is to show standard product line breath. Our in-house manufacturing capabilities can customize and unit to suit     back to top Standard Product Selection Guide More Details 4700, 4700H 4800 Click here to view our Accessories Stern & Mounting Material Brass or SST PVC Float Material SST Advantages High pressure, hazardous locations, silicone potted, shock & vibration resistant Increased float strength, economical Mounting Sizes 1/4” NPT. Reed Switch 20 VA SPST, 100 VA SPST, 20 VA SPDT,    20 VA SPST Hazardous Locations 4700H Class I Div. I Groups C & D Class I Div. 2 Groups A, B, C & D N/A Operating Temperatures -40°F to +300°F -40°F to +140°F Operating Pressure 750 PSI Max. 100 PSI Max.  Notes Complement of outlined switches is to show standard product line breath. Our in-house manufacturing capabilities can customize and unit to suit     ALL PRODUCTS IN STOCK FOR IMMEDIATE SHIPMENT!

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Thomas Products Ltd.
1-800-666-9101
987 West Street • Southington, CT 06489-1023
Tel: 860-621-9101 • Fax: 860-621-1470

Thomas Products manufactures level and flow switches for the Process Control,
Petroleum, Chemical, Semiconductor, Marine, Harsh Environment, Commercial Building,
Refrigeration, Air Conditioning, and Critical Condition Industries and many more.

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