Proximity Switch - Ferrous

IECEx ATEX Exd UKEx Hazardous Area Proximity Switches - FS-B Series
Certifications / Approvals







FS-B Series overview
For demanding and hazardous environments in which reliable signal detection is critical, the FS-B Series Proximity Switch (5/8" UNF Thread) is specifically engineered with Ex d protection for for Zones 1/21 or 2/22.
With their proven magnetic sensing technology, these switches detect ferrous materials like carbon steel or stainless steel (17/4 or 400 series) at distances up to 2.5mm (0.1"), making them ideal for harsh environments.
With its volt-free SPCO/SPDT (Form C) contacts, the FS-B Series can be configured as normally open or normally closed, providing operational flexibility in safety-critical environments. The switches' adaptability makes them well-suited to hazardous areas where precision and dependability are essential.
The following hazardous area certifications apply to the FS-B Series.
Explosion Proof: | IECEx & ATEX Ex d/db/tb (Zone 1 & Zone 21) ¦ UL/CSA (Class I & II, Div1 & Div2) |
Intrinsically Safe: | IECEx & ATEX Ex ia (Zone 0 & Zone 20) ¦ UL/CSA IS (Zone 0) |
Other Regional Approvals Include: | EAC/TRCU, INMETRO, KCs, CCOE/PESO, ECAS ex, NEPSI/CQST |
With an innovative integrated junction box/connection head, the FS-B Series offers multiple configuration options: hardwired or wireable (W, WL, WLR). In confined or hazardous spaces, this design eliminates the need for additional components, simplifying installation.
Engineered to meet the strict requirements of IEC 61508:2010 (Routes 1H & 1S) with Systematic Capability (SC3), the FS-B Series proximity switches are certified for use in safety-related systems. They support safety functions up to SIL 2 with HFT=0 (1oo1) and SIL 3 with HFT=1 (1oo2), ensuring reliability and compliance in critical applications within hazardous zones.
- Body Shape
- Cylindrical
- Body Material
- 316L Stainless Steel
- Contact Arrangement
- SPCO / SPDT (Form C)
- Contact Material
- Palladium-Silver
- Max Current
- 4A
- Conduit Entry
- 1/2" NPT
- 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
- 5/8"-18 UNF (47.75mm / 1.88" 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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