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Products/Festo/538279
Festo 538279 Proximity sensor SIED-M18B-ZS-S-L
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Festo

538279

Proximity sensor SIED-M18B-ZS-S-L

The Festo part number 538279 is a round inductive industrial component conforming to EN 60947-5-2 with a rated operating distance of 5 mm and an assured operating distance of 4.05 mm. This non-contacting 2-wire unit features an N.O. contact switching element function, a maximum DC switching frequency of 490 Hz, a maximum AC switching frequency of 25 Hz, and a maximum output current of 300 mA across an ambient temperature range of -25 °C to 85 °C. It carries RCM compliance, c UL us-Listed (OL) certification, and CE and UKCA markings as per EU and UK directives for EMC and electrical equipment. Submit the exact part number, quantity, and application requirements to request a quote.

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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
538279
Data verification
Manufacturer evidence reviewed

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Exact part-number verificationTechnical properties are matched to 538279.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.

Verified configuration

Technical Specifications

Design
Round
Conforms to standard
EN 60947-5-2
Certication
RCM compliance mark | c UL us - Listed (OL)
CE marking (see declaration of conformity)
As per EU EMC directive | As per EU low voltage directive
UKCA marking (see declaration of conformity)
To UK instructions for EMC | To UK instructions for electrical equipment
Measuring principle
Inductive
Rated operating distance
5 mm
Assured operating distance
4.05 mm
Reduction factors
Aluminum = 0.4 | Stainless steel St 18/8 = 0.7 | Copper = 0.3 | Brass = 0.4 | Steel St 37 = 1.0
Ambient temperature
-25 °C...85 °C
Repetition accuracy
0.15 mm
Switching output
Non-contacting, 2-wire
Switching element function
N.O. contact
Hysteresis
0.04 mm...1.15 mm
Max. switching frequency DC
490 Hz
Max. switching frequency AC
25 Hz
Max. output current
300 mA
Voltage drop
8 V
Minimum load current
5 mA
Short-circuit protection
No
Operating voltage range AC
20 V...265 V
DC operating voltage range
20 V...320 V
Mains frequency
50 Hz
Idle current
1.5 mA
Reverse polarity protection
for all electrical connections
Electrical connection
2-pin | M12x1

Engineering context

Identification and RFQ Guidance

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.

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 538279. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.