Long Lasting, Dependable Performance
With stainless steel wetted materials, reversible switch orientation, and CSA & NSF 169 certifications, FS-500 switches are go-anywhere, use-everywhere horizontal float switches.
Three Mounting Options Choose from dual 1/2" NPTMs, 1/2" NPTM and 1/4" NPTM, or Bulkhead mount with 1/2 - 13 threads.
CSA and NSF Approvals Standard Temperature, dual-NPTM mount switches are CSA Explosion Proof, while all Bulkhead mount switches and all High Temperature models are approved for General Use. Every FS-500 is NSF 169.
100W Switching Capacity FS-500 switches are rated for 100W resistive loads, at up to 120 VDC or 240 VAC.
- C I, D1 Hazardous Locations
- Food / Beverage
- Water / Wastewater
Common Model Configurations
All common model configurations can be purchased online, click the model number link below. Refer to Model Number Configurator on the datasheet for a full list of configuration options.
|Model Number||Model Description|
|FS-500-S-M1-M1-0.6-P1P1-24||Stainless Steel Stem and Float, Standard Temperature, 0.6 SG, 1/2"-1/2" NPTM, 24" Wires|
|FS-500-HT-M1-M1-0.6-P1P1-24||Stainless Steel Stem and Float, High Temperature, 0.6 SG, 1/2"-1/2" NPTM, 24" Wires|
|FS-500-S-M1-M1-0.6-P1P0-36||Stainless Steel Stem and Float, Standard Temperature, 0.6 SG, 1/2"-1/4" NPTM, 36" Wires|
|FS-500-HT-M1-M1-0.6-P1P0-36||Stainless Steel Stem and Float, High Temperature, 0.6 SG, 1/2"-1/4" NPTM, 36" Wires|
|FS-500-S-M1-M1-0.6-P58-48||Stainless Steel Stem and Float, Standard Temperature, 0.6 SG, Bulkhead, 48" Wires|
|FS-500-HT-M1-M1-0.6-P58-48||Stainless Steel Stem and Float, High Temperature, 0.6 SG, Bulkhead, 48" Wires|
300 psi / 20.7 bar (Dual NPTM mounts)
100 psi / 6.9 bar (Bulkhead mount)
10° ± 3°
8° ± 1°
100 W (resistive load only)
Max Current (AC, 50/60 Hz)
0.416 A @ 240 VAC
0.833 A @ 120 VAC
1 A @ ≤ 100 VAC
Max Current (DC)
0.833 A @ 120 VDC
1 A @ ≤ 100 VDC
Mount & Stem Materials
Varies per model and installation.
See dimensional drawings on Datasheet.
-40 to 368° F (-40 to 187° C)
-40 to 500° F (-40 to 260° C)
NEMA 4X (Dual NPTM only)
CSA: Stnd Temp Dual NPTM
Class I, Div 1 & 2; Grps A,B,C,D, T3
Class II, Div 1; Grps E,F, T200°C
Class II, Div 2; Grps F,G, T200°C
Ta -40°C to 187°C
CSA: High Temp Dual NPTM