Confirm the exact configuration
Use the manufacturer part number and model code—not appearance alone. Connection, size, material, voltage, pressure, seal, and control options can differ within the same product family.
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Festo
538257
Proximity sensor SIEH-M18B-NS-S-L-CR
The Festo 538257 is an industrial component featuring an NPN switching output with a normally open contact function, operating within a DC voltage range of 10 V to 30 V. It provides a rated operating distance of 10 mm, an assured operating distance of 8.1 mm, and a maximum switching frequency of 200 Hz with pulsed short-circuit protection. This unit conforms to standard EN 60947-5-2, carries RCM and c UL us listings, and complies with EU and UK directives for EMC and RoHS. Submit the exact part number, quantity, and application requirements for a quote.
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Request a QuoteWhy no listed price?
Industrial and obsolete parts are priced per enquiry: the final price depends on available stock, condition, quantity, and your delivery destination, so a fixed list price would be misleading. Request a quote and we confirm current pricing, lead time, and sourcing options — including hard-to-find and discontinued Festo references — within one business day.
- Manufacturer
- Festo
- Part number
- 538257
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 538257.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Conforms to standard
- EN 60947-5-2
- Certication
- RCM compliance mark | c UL us - Listed (OL)
- CE marking (see declaration of conformity)
- As per EU EMC directive | As per EU RoHS directive
- UKCA marking (see declaration of conformity)
- according to UK regulations for EMC (UK-E) | according to UK RoHS regulations (UK-R)
- Rated operating distance
- 10 mm
- Assured operating distance
- 8.1 mm
- Reduction factors
- Aluminum = 1.0 | Stainless steel, 1 mm thick = 0.4 | Stainless steel, 2 mm thick = 0.8 | Copper = 0.85 | Brass = 1.3 | Steel St 37 = 1.0
- Ambient temperature
- -25 °C...70 °C
- Switching output
- NPN
- Switching element function
- N.O. contact
- Reproducibility, switching value FS
- 0.5 mm
- Hysteresis
- 1.22 mm
- Max. switching frequency
- 200 Hz
- Max. output current
- 200 mA
- Voltage drop
- 2 V
- Inductive protective circuit
- Installed | Output current <100 mA | and switching frequency < 10 Hz
- Short-circuit protection
- Pulsed
- DC operating voltage range
- 10 V...30 V
- Residual ripple
- 20%
- Idle current
- 17 mA
- Reverse polarity protection
- for all electrical connections
- Electrical connection 1, connection type
- Plug
- Electrical connection 1, connection technology
- M12x1 A-coded as per EN 61076-2-101
- Electrical connection 1, number of pins/wires
- 4
Engineering context
Identification and RFQ Guidance
What to include in your RFQ
Provide quantity, delivery country and ZIP/postal code, required condition, target date, and photographs of the existing nameplate when available.
Technical verification
Our sourcing response is prepared against Festo 538257. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.