• APG's FS-400 Stainless Steel Float Switch
  • FS-400 Stainless Steel Float Switch
  • Stainless Steel Float Switch from APG Sensors
  • Single Point Float Switch | APG Sensors
  • APG Sensors Single Point Stainless Steel Float Switch

Stainless Steel Vertical Float Switch

FS-400

Compact, Durable, Easy to Use

With all stainless steel wetted materials, operating temperatures up to 500° F, and a 100 W switch, the series FS-400 float switch fits a wide range of applications in two standard configurations.

Description

Compact Size
From the top of the mounting threads, to the bottom of the stem, the FS-400 is less than 3.5" long, and the float is just over 2" wide.

Temperature Ranges
The FS-400-S has an operating temperature range of -40° to 368° F (-40° to 187° C), and the FS-400-HT extends that range to -40° to 500° F (-40° to 260° C)!

Certifications
FS-400-S switches carry CSA Explosion Proof certifications, while FS-400-HT models are certified for General Use. All FS-400 switches are NSF 169 certified.

User Reversible Operation
FS-400 float switches come standard with Normally Open operation. The e-clip at the bottom of the stem is easily removed to change to orientation of the float, changing the switch operation to Normally Closed.

Common Applications
  • C I, D 1 Hazardous Locations
  • Food / Beverage
  • Chemical
  • 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-400-S-M1-M1-0.6-P0-24 Stainless Steel Stem and Float, Standard Temperature, 0.6 SG, 1/4" NPTM, 24" Wires
FS-400-HT-M1-M1-0.6-P0-24 Stainless Steel Stem and Float, High Temperature, 0.6 SG, 1/4" NPTM, 24" Wires
FS-400-S-M1-M1-0.6-P0-36 Stainless Still Stem and Float, Standard Temperature, 0.6 SG, 1/4" NPTM, 36" Wires
FS-400-HT-M1-M1-0.6-P0-36 Stainless Steel Stem and Float, High Temperature, 0.6 SG, 1/4" NPTM, 36" Wires
FS-400-S-M1-M1-0.6-P0-48 Stainless Steel Stem and Float, Standard Temperature, 0.6 SG, 1/4" NPTM, 48" Wires
FS-400-HT-M1-M1-0.6-P0-48 Stainless Steel Stem and Float, High Temperature, 0.6 SG, 1/4" NPTM, 48" Wires
Datasheets & Downloads
Specifications
 

   Performance

Switch Points
1 NO/NC
Customer Reversible
Specific Gravity
Minimum 0.6
Pressure Rating
200 psi / 13.8 bar (Standard)
500 psi / 34.5 bar (High Temperature)
Normally Open Actuation
0.220" ± 0.015"
5.59 mm ± 0.38 mm
Normally Closed Actuation
0.160" ± 0.015"
4.06 mm ± 0.38 mm
Hysteresis
0.070" ± 0.010"
1.78 mm ± 0.25 mm


   Electrical

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 VSC
Max Current (DC)
0.833 A @ 120 VDC
1 A @ ≤ 100 VDC


   Approvals

CSA: FS-400-S
Explosion Proof
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: FS-400-HT
General Use
Single Seal
All Models
NSF 169
All Models

   Physical

Mount & Stem Materials
316L SS
Float Materials
316L SS
Length
3.44 in. - top of threads to bottom of stem
Width
2.06 in. - float diameter


   Environmental

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

 
Product Videos

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