Festo SIEF-M8B-PS-S-L Proximity Sensor

USD 63.93

Flush M8 inductive sensor, PNP NO, 10–30 VDC, 1.5 mm sensing, IP68, 2000 Hz, M8x1 plug.

SKU Festo-553537 Category
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Festo SIEF-M8B-PS-S-L Proximity Sensor

Model Identifier SIEF-M8B-PS-S-L
Official Part Number 553537
GTIN Standard 4052568095932

Technical Overview

Compact round inductive proximity sensor for flush mounting in industrial automation. The official Festo datasheet identifies part number 553537 as SIEF-M8B-PS-S-L with PNP normally-open output, 10 V to 30 V DC supply range, 1.5 mm rated sensing distance, 2000 Hz switching frequency, 150 mA max output current, IP68 protection, and 3-pin M8x1 plug connection. It is designed for harsh environments with a -30 °C to 85 °C operating range and a 12 g product weight.

Key Features

  • Round inductive proximity sensor
  • Flush mounting design
  • PNP switching output
  • Normally open contact function
  • 10 V to 30 V DC operating supply
  • 1.5 mm rated operating distance
  • 2000 Hz maximum DC switching frequency
  • 150 mA maximum output current
  • 3-pin M8x1 plug electrical connection
  • IP68 degree of protection
  • Yellow LED switching status indication
  • Reverse polarity protection on all electrical connections
  • Magnetic field immunity
  • RoHS-compliant construction

IP68-rated flush-mount inductive sensing with 1.5 mm range and 2000 Hz switching for compact machine feedback.

Technical Specification Matrix

ParameterValue
DesignRound
Conforms to standardEN 60947-5-2
ApprovalRCM trademark; c UL us listed (OL)
Rated operating distance1.5 mm
Ambient temperature-30 °C...85 °C
Repetition accuracy0.08 mm
Switching outputPNP
Switching element functionN/O contact
Max. switching frequency DC2000 Hz
Max. output current150 mA
Short circuit current ratingPulsed
Operational voltage range DC10 V...30 V
Reverse polarity protectionFor all electrical connections
Electrical connection3-pin M8x1 plug
Connector housing materialBrass, chrome-plated
SizeM8
Mounting typeFlush
Product weight12 g
Housing materialPA; high-alloy stainless steel
Switching status indicationYellow LED
Degree of protectionIP68
Immunity to magnetic fieldsMagnetic direct and alternating field

Industrial Applications

1. Compact cylinder position feedback

Used on pneumatic cylinders or compact actuators where a flush-mounted sensor must confirm end position within a small installation envelope.

Problem Solved

Provides reliable binary position confirmation in tight spaces with IP68 sealing and magnetic-field immunity.

inductive sensingflush mountPNP NOIP68M8 sensorcylinder feedback

2. High-speed machine indexing detection

Suitable for fast-moving indexing mechanisms that require rapid on/off feedback without mechanical contact wear.

Problem Solved

2000 Hz switching frequency supports high-cycle detection with a 150 mA output stage for PLC input interfacing.

2000 Hzindustrial automationnon-contact detectionPLC inputhigh cycle rate

3. Harsh-environment end-stop sensing

Fits washdown or contaminated environments where ingress protection and robust housing materials are required for dependable sensing.

Problem Solved

IP68 protection, wide -30 °C to 85 °C range, and corrosion-resistant connector construction improve uptime in severe conditions.

IP68washdowntemperature rangeindustrial sensingcorrosion-resistant connector
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