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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
551401
Proximity sensor SIES-8M-NO-24V-K-7,5-OE
The Festo 551401 is an inductive industrial component designed for T-slots with a 1.5 mm rated operating distance and an NPN switching output featuring an NC contact function. This sensor conforms to EN 60947-5-2 and operates within an ambient temperature range of -25 °C to 70 °C while achieving a maximum switching frequency of 4500 Hz and a repetition accuracy of ≤ 0.05 mm under constant conditions. It carries RCM, c UL us - Listed (OL), KC-EMV, CE, and UKCA compliance marks with RoHS-compliant materials. Submit the exact part number, quantity, and application requirements for an RFQ 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
- 551401
- Data verification
- Manufacturer evidence reviewed
For a faster response, include quantity, condition, and delivery destination.
Exact part-number verificationTechnical properties are matched to 551401.
Worldwide sourcingSupport for planned and urgent industrial requirements.
Manufacturer documentationA document is added when the reviewed source provides one.
Verified configuration
Technical Specifications
- Design
- For T-slot
- 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)
- To UK instructions for EMC | To UK RoHS instructions
- KC characters
- KC-EMV
- Note on materials
- RoHS compliant
- Measured variable
- Position
- Measuring principle
- Inductive
- Rated operating distance
- 1.5 mm
- Reduction factors
- Aluminum = 0.62 | Stainless steel V2A = 0.95 | Copper = 0.6 | Brass = 0.72 | Steel St 37 = 1.0
- Ambient temperature
- -25 °C...70 °C
- Repetition accuracy under constant conditions
- <= 0.05 mm, approach from the side
- Switching output
- NPN
- Switching element function
- NC contact
- On time
- 0.1 µs
- Max. switching frequency
- 4500 Hz
- Max. output current
- 150 mA
- Max. switching capacity DC
- 4.5 W
- Voltage drop
- 2 V
- Inductive protective circuit
- Installed
- Minimum load current
- 0 mA
- Residual current
- 10 µA
- Short-circuit protection
- Pulsed
- Overload protection
- Available
- DC operating voltage range
- 10 V...30 V
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 551401. Final compatibility remains subject to the machine manufacturer’s requirements and complete application data.