With stainless steel wetted materials, reversible switch orientation, and CSA & NSF 169 certifications, FS-500 stainless steel float switches are go-anywhere, use-everywhere horizontal float switches.
Choose from dual 1/2" NPTMs, 1/2" NPTM and 1/4" NPTM, or Bulkhead mount with 1/2 - 13 threads.
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 float switch is NSF 169.
FS-500 stainless steel float switches are rated for 100W resistive loads, at up to 120 VDC or 240 VAC.
All common model configurations can be purchased online. Click the float switch model number link below. Refer to the Float Switch 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-P0P1-36 | Stainless Steel Stem and Float, Standard Temperature, 0.6 SG, 1/4"-1/2" NPTM, 36" Wires |
| FS-500-HT-M1-M1-0.6-P0P1-36 | Stainless Steel Stem and Float, High Temperature, 0.6 SG, 1/4"-1/2" 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 |
Switch Points
1 NO/NC
Customer Reversible
Specific Gravity
Minimum 0.6
Pressure Rating
300 psi / 20.7 bar (Dual NPTM mounts)
100 psi / 6.9 bar (Bulkhead mount)
Actuation Angle
10° ± 3°
Hysteresis
8° ± 1°
Mount & Stem Materials
316L SS
Float Materials
316L SS
Bulkhead Gasket
Silicon
Length
Varies per model and installation.
See dimensional drawings on Datasheet.
Switch Rating
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
Operating Temperature
Standard
-40 to 368° F (-40 to 187° C)
High Temp
-40 to 500° F (-40 to 260° C)
Enclosure Rating
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
Class III
Ta -40°C to 187°C
CSA: High Temp Dual NPTM
General Use
CSA: Bulkhead
General Use
Single Seal
All Models
NSF 169
All Models
