Proximity Switch - Ferrous

High Temperature UL & CSA Dust Groups Proximity Switch - FS-K Series
Certifications / Approvals







FS-K Series overview
The FS-K Series Proximity Switch (M18 Thread) is designed to function in extreme conditions, with temperatures up to +400°F / 204°C, and compliant with stringent UL and CSA dust group classifications. Leveraging advanced magnetic sensing technology, these switches reliably detect ferrous materials such as carbon steel or stainless steel (17/4 or 400 series) at distances of up to 2.5mm (0.1"). Their volt-free SPCO/SPDT (Form C) contacts ensure reliable and versatile signal switching.
With an optional side-exiting lead configuration, the FS-K series provides optimised installation in space-constrained environments.
Hazardous area certifications for the FS-K Series are listed below.
Explosion Proof: | IECEx & ATEX Exd (Zone 1 & Zone 21) |
Intrinsically Safe: | IECEx & ATEX Exia (Zone 0 & Zone 20) ¦ UL/CSA (Zone 0) |
Other Regional Approvals Include: | EAC/TRCU, INMETRO, KCs, CCOE/PESO, ECAS ex, NEPSI/CQST |
The FS-K series is designed for safety-critical operations in accordance with the IEC 61508:2010 Routes 1H and 1S with Systematic Capability (SC3). These switches are ideal for integration into safety-related systems, performing safety functions up to SIL 2 (HFT=0, 1oo1 architecture) and SIL 3 (HFT=1, 1oo2 architecture). They are a dependable choice for challenging industrial applications involving high temperatures and hazardous dust group conditions.
- Body Shape
- Cylindrical
- Body Material
- 316L Stainless Steel
- Contact Arrangement
- SPCO / SPDT (Form C)
- Contact Material
- Palladium-Silver
- Max Current
- 4A
- Conduit Entry
- No Conduit Entry
- Temperature Class (T Rating)
- T3 / T4 / T6
- Operating Temperature Range
- -60°C to +204°C / -76°F to +400°F
- Sensing Face Pressure Rating
- 2000psi / 138 bar
- Environmental Protection
- IP 66, 67 & 68 (24hrs at 30m)/ NEMA 4X & 6P
- Safety Rating
- SIL 2 / SC3
- Actuation
- Ferrous Actuated (Magnet Optional)
- Mounting Thread
- M18x1.0 (47.60mm / 1.87" long) c/w 2 x locknuts
- Sensing Range with Magnet
- <12mm (0.47")
- Range (ferrous target)
- 2.5mm|0.10"
- Repeatability
- Approx. 0.05mm (0.002")
- Response Time
- 8 ms
- Differential / Hysteresis
- < 0.51mm (0.020")
All of our products are also available as Ordinary Location / General Industrial.
Please select your certification and protection concept for your specific requirement from the Part Number builder below
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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Installation and Operating Instructions |
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