Schneider XS618B1MAL2 — M18 Inductive Sensor Buying Guide

By Abdullah Zahid
14 min read
Schneider Electric XS618B1MAL2 OsiSense XS6 M18 cylindrical inductive proximity sensor for industrial metal detection automation

Schneider XS618B1MAL2 OsiSense XS6 M18 Inductive Proximity Sensor: Specifications, Pricing, and Selection Guide

Controls engineers and procurement specialists searching for the Schneider XS618B1MAL2 are typically at the final confirmation stage — air gap measured, output type confirmed, voltage supply verified — and simply need a trusted source to validate specs and close the order. The XS618B1MAL2 is an OsiSense XS6 series M18 cylindrical inductive proximity sensor with an 8mm sensing distance, 24-240V AC/DC supply compatibility, and a 2-wire Normally Open output configuration. It carries IP68/IP69K washdown protection and UL/CSA certification, making it a go-to discrete input device across automotive, food and beverage, and packaging automation applications worldwide.

If you have already confirmed this is the correct part for your application, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Order the XS618B1MAL2 — and Who Shouldn't

The XS618B1MAL2 is the right choice when all of the following conditions are true for your application:

  • Your installation bore is M18 x 1.5 ISO standard — not M30, M12, or a proprietary thread size
  • The measured air gap from your sensor mounting surface to the target metal object falls between 6mm and 10mm
  • Your control cabinet supplies 24-240V AC or DC — this sensor cannot operate on 12V without an external step-up converter
  • Your application requires a 1 Normally Open (NO) discrete output — contact closes when metal is detected
  • Your production environment requires IP68/IP69K washdown protection and demands UL/CSA certification for regulatory compliance
  • A 2m pre-cabled configuration suits your cabinet-to-sensor routing distance without field splicing

If your air gap is 3-4mm, you need the XS612B1MAL2. If it exceeds 12mm and reaches 25-35mm, the XS630B1MAL2 is the correct selection. If your application requires a Normally Closed output, the XS618B1PZL2 is the appropriate variant. If you need a field-replaceable connector, the XS618B1TAL2 with M12 connector is the one to order.

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What the XS618B1MAL2 Actually Does in a Control System

The XS618B1MAL2 functions as a discrete input trigger device — it detects the presence or absence of a metal object within an 8mm range and outputs a clean digital signal to a PLC or industrial controller. The 2-wire configuration means the sensor carries both power and signal on the same two conductors, which reduces cabinet wiring complexity and saves terminal space compared to 3-wire PNP or NPN alternatives. The output is 1 Normally Open contact: when no metal is within the detection zone, the output contact is open; when a ferrous or non-ferrous metal target enters the 8mm range, the contact closes and the connected PLC input registers a logic 1.

The M18 x 1.5 cylindrical housing with a 62mm body length is the dominant form factor across OEM machinery platforms in automotive, food and beverage, and packaging sectors in North America. Because this thread standard is so widely adopted across machine platforms, the XS618B1MAL2 typically drops into existing bores on retrofit projects without any mechanical rework. The nickel-plated brass housing contributes corrosion resistance in wet and chemically aggressive environments, and the IP68/IP69K dual rating means the sensor survives both full submersion and high-pressure washdown spray — a requirement that eliminates costly downtime from sensor failure in food production and pharmaceutical facilities.

The 24-240V AC/DC supply voltage range is one of this model's most commercially significant characteristics. A single part number covers mixed electrical infrastructure — facilities running legacy 120V or 240V AC machinery alongside modern 24V DC PLC cabinets can standardize on this one sensor across their entire site, eliminating the voltage-specific variant proliferation that creates unnecessary SKU management overhead.

Typical System Architecture for M18 Inductive Proximity Sensors

The XS618B1MAL2 sits at the field device layer of the I/O architecture, delivering a discrete digital signal upstream to the controller. Here is where it fits in a typical deployment chain:

  • PLC or industrial controller (Allen-Bradley, Siemens, Mitsubishi, or equivalent) — receives the discrete input signal and executes automation logic
  • Discrete input module or onboard I/O terminal — connects to the sensor output conductor and supplies the 24-240V signal to the controller logic
  • Control cabinet power distribution rail — supplies 24V DC or 120/240V AC to the Brown (power) conductor of the 2m pre-cabled sensor
  • XS618B1MAL2 mounted in M18 x 1.5 bore — positioned so sensor face is flush with mounting surface, 6-10mm air gap to metal target
  • Target metal object (ferrous or non-ferrous) on conveyor, machine spindle, gate, or tool magazine — enters the detection zone and triggers the NO contact closure

Where This Sensor Gets Deployed: Industries and Use Cases

In automotive assembly, the XS618B1MAL2 is commonly used for part presence verification at conveyor transfer stations — confirming that a metal carton, bracket, or component has arrived at the correct position before a downstream robot or press cycle is initiated. The 8mm sensing distance and M18 form factor align with the tooling dimensions common in automotive body-in-white and powertrain assembly lines.

Food and beverage production lines rely on this sensor at end-of-line palletizers and filling stations, where the IP69K rating is not optional — it is a baseline requirement. High-pressure washdown between production runs means sensors without this protection fail within weeks. The XS618B1MAL2's dual IP rating and nickel-plated brass housing satisfy hygiene-driven environments without requiring enclosure upgrades.

In machine tool and CNC applications, the sensor provides metal workpiece confirmation before spindle cycle initialization — a safety-critical function where the 1000Hz DC switching frequency ensures that even high-speed detection cycles do not miss a target pass. Gate and barrier safety interlocks in material handling and logistics automation also use this model to verify metal object position as a hold condition before barrier movement is permitted.

Application Typical Deployment
Conveyor belt part presence detection Sensor mounted in M18 bore on conveyor frame; detects metal container position before downstream processing station trigger
End-of-line palletizer part count Metal object detection at fixed station; NO output increment triggers batch count logic in PLC
CNC spindle workpiece confirmation Flush-mounted in machine body; 8mm air gap to metal workpiece confirms part load before cycle start
Gate and barrier safety interlock Metal object detection holds barrier closed; NO output wired to safety relay input for gate lock logic
Automatic tool changer verification Tool magazine metal position confirmed via sensor signal; spindle tool change blocked until NO contact confirms position

Key Specifications: What Engineers Need to Confirm Before Buying

Parameter Value
Housing Form Factor M18 x 1.5 Cylindrical, L62mm body length
Housing Material Nickel-plated Brass
Sensing Distance (Sn) 8 mm
Output Type 1 Normally Open (NO), 2-Wire AC/DC
Supply Voltage 24-240 VAC/DC
Maximum Switching Capacity 5-300mA AC; 5-200mA DC
Switching Frequency 1000 Hz (DC mode); 25 Hz (AC mode)
Cable Configuration 2m pre-cabled shielded; M12 connector variant available on special order
IP Protection Rating IP68, IP69K
Operating Temperature -25 to +70°C

Full technical specifications are available on the product page at LeadTime.ca.

XS618B1MAL2 vs. Other OsiSense XS Variants: Which One Is Right?

Model Variant Sensing Distance Output Type Cable Configuration Best For
XS612B1MAL2 4 mm 1 NO 2m cable Short air gap; precision detection applications
XS618B1MAL2 ← This model 8 mm 1 NO 2m cable General-purpose standard applications across most industrial platforms
XS630B1MAL2 30 mm 1 NO 2m cable Extended sensing; larger air gaps and mounting distance constraints
XS618B1PZL2 8 mm 1 NC 2m cable Normally Closed logic; output opens on metal detection
XS618B1ZAL2 8 mm PNP NO 2m cable 3-wire PLC digital input requiring PNP logic signal
XS618B1TAL2 8 mm 1 NO M12 connector Field-replaceable connector; modular cable routing requirement

If your application air gap exceeds 10mm, the XS618B1MAL2 is not the correct selection — the XS630B1MAL2 with its 30mm sensing range is the appropriate choice. Check current availability at LeadTime.ca and contact the team if you need help confirming the right variant before ordering.

Expert Verdict: Is the XS618B1MAL2 Worth Specifying?

The XS618B1MAL2 earns its position as a high-volume workhorse sensor in industrial automation for a straightforward reason: the combination of M18 form factor universality, 24-240V supply range, and dual IP68/IP69K protection eliminates the three most common friction points in sensor procurement — mounting incompatibility, voltage mismatch, and environmental protection shortfall. For controls engineers retrofitting existing machinery, OEM designers standardizing a parts list across multi-voltage facilities, and maintenance managers sourcing a reliable replacement in a food or pharmaceutical environment, this model resolves all three concerns from a single part number. The UL and CSA certifications remove the compliance verification burden that otherwise adds days or weeks to project approval workflows.

Where this model has real limits: buyers who need a Normally Closed output should order the XS618B1PZL2 and not assume the two models are interchangeable — the output logic is inverted and the commissioning failure mode is a complete apparent sensor malfunction that costs hours to diagnose. Engineers requiring PNP digital logic for modern 3-wire PLC input modules should evaluate the XS618B1ZAL2 instead. The fixed 2m cable is the other genuine constraint — anyone running more than 2m from the sensor mounting location to the control panel cabinet should either order the XS618B1TAL2 M12 connector variant with industrial-rated extension cords, or request a custom cable length at order time. Field splicing the pre-cabled version in a high-EMI environment is a false economy that produces signal noise problems under load.

On the procurement side, stock availability for the XS618B1MAL2 is generally healthy through major authorized distributors, with standard fulfillment running 2-3 weeks through primary North American channels and extending to 4-6 weeks during peak Q4 manufacturing ramp periods. Volume orders at 25 or more units typically ship within 1-2 weeks through major distributors. Ordering through a specialist distributor who holds regional inventory and can confirm current lead times before your PO is submitted matters significantly when a production schedule is involved. Check current pricing and stock status for the XS618B1MAL2 at LeadTime.ca — we ship worldwide and can advise on alternatives if the primary model is on extended lead time.

For volume pricing or to confirm lead time before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Need to Know Before Ordering the XS618B1MAL2

Community discussion specific to the XS618B1MAL2 is limited in public forums, which is itself informative: this is a mature, well-understood part number that experienced controls engineers order with confidence when their application parameters are clearly defined. The questions that do surface consistently are not about product quality — they are about pre-order specification errors that result in the wrong variant arriving on site. The pattern is consistent enough that it is worth addressing directly.

The most documented ordering mistake is selecting the wrong sensing distance variant. Engineers who skip the air gap measurement step and assume the 8mm model is a universal standard find themselves either with a sensor that cannot reliably detect their target (air gap too large for 8mm capability) or with a higher-range model that generates false positives at close distances. The fix is a two-minute measurement before any model discussion begins: measure the actual distance in millimeters from the sensor mounting surface to the nearest edge of the target metal object under operating conditions. If that number is 3-4mm, the XS612B1MAL2 is the correct order. If it is 6-10mm, the XS618B1MAL2 applies. If it reaches 25-35mm, the XS630B1MAL2 is required.

The second recurring issue is voltage supply mismatch. The 24-240V range is wide, but 12V is not within it, and some legacy embedded control systems or custom machine cabinets use 12V DC as the primary logic supply. A sensor that will not power up at 12V gets returned as defective — when the actual issue is a voltage supply mismatch that was avoidable with a one-line datasheet check. The third issue is output type confusion: the XS618B1PZL2 (Normally Closed) is sometimes ordered in place of the XS618B1MAL2 (Normally Open) when the output type requirement was not explicitly documented on the purchase request. The application behaves in reverse, and the diagnosis time loss on a production line is the real cost. When community data is sparse and manufacturer documentation is the primary reference, LeadTime.ca's team serves as the specialist check — contact us before ordering if any of these variables are not fully confirmed for your application.

Wiring and Installation: What to Verify Before You Mount This Sensor

The XS618B1MAL2 uses a 2-wire configuration — Brown conductor to the positive supply terminal (24-240V), Blue conductor to the supply return or common. For full installation and wiring diagrams specific to your PLC platform, refer to the official Schneider Electric XS618B1MAL2 datasheet. Key installation checkpoints before you proceed:

  • Confirm the M18 x 1.5 bore exists or can be tapped to ISO specification; verify 62mm minimum clearance depth behind the mounting surface for the long-body sensor insertion
  • Verify supply voltage at the cabinet terminal block with a multimeter before connecting the sensor — must be within 24-240V AC or DC range; 12V will not power this model
  • Route the 2m shielded cable away from high-voltage power lines, VFD output conductors, and rotating machinery to prevent EMI-induced false triggers
  • Secure with the 22mm lock nut hand-snug plus approximately one-quarter turn — do not over-tighten, as excessive force can compromise the IP68/IP69K seals and strip the M18 thread
  • After power-up, verify the indicator LED illuminates at rest and changes state when a metal target enters the 8mm detection zone; confirm the corresponding PLC discrete input toggles between 0 and 1 during test cycling

Wrong-Part Prevention: Eight Checks Before You Submit the Purchase Order

Before finalizing any order for the XS618B1MAL2, run through this checklist verbatim — these are the eight checks that prevent the most common and costly specification errors:

  1. Confirm M18 x 1.5 mounting thread matches your installation bore (not M30, M12, or proprietary sizes)
  2. Measure actual air gap distance from sensor mounting surface to nearest edge of target metal object — must be 6-10mm for reliable operation with this 8mm model
  3. Verify 24-240V supply voltage is available in your control cabinet (this sensor cannot operate on 12V or 16V without external step-up converter)
  4. Confirm 1 Normally Open (NO) output requirement — if application requires NC (Normally Closed) or PNP digital logic, order alternative variant
  5. Check flush-mount requirement — this model is shielded and designed for M18 bore insertion; non-shielded non-flush variants exist for different mechanical constraints
  6. Verify 2m pre-cabled configuration works for your cabinet-to-sensor distance; longer cable extensions require external conduit and splicing (not recommended due to EMI sensitivity)
  7. Confirm IP68/IP69K washdown rating is required; lower-cost non-washdown models available if dry environment only
  8. Verify response time (25Hz AC / 1000Hz DC switching) meets your cycle-time requirements (fast DC response suitable for high-speed detection; slower AC response for legacy applications)

If any of these checks raise a question before you commit, contact the LeadTime.ca team — we can help confirm the correct variant and check current lead times before the order is placed.

Frequently Asked Questions

Can the XS618B1MAL2 detect both ferrous and non-ferrous metals, or only steel and iron?

The XS618B1MAL2 detects both ferrous and non-ferrous metals, including steel, iron, aluminum, and copper. However, the effective sensing distance may vary slightly depending on target material — the nominal 8mm sensing distance is calibrated for ferrous steel targets. Non-ferrous materials like aluminum may trigger detection at a slightly shorter distance, so test with your actual target material during commissioning if the application is tolerance-sensitive.

Why is there no output signal even though the LED is illuminated after power-up?

A steady LED with no output signal typically indicates a wiring issue at the PLC input terminal rather than a sensor fault. Verify that the output conductor is connected to the correct PLC discrete input terminal and that the logic common return is properly connected. Also confirm supply voltage polarity — the 2-wire configuration has no reverse polarity protection, and an inverted connection may produce no output signal even with the LED appearing active.

Is the XS618B1MAL2 a direct replacement for the older Telemecanique XS618B1MAL2 part number, or has the designation changed?

Schneider Electric markets the OsiSense XS product family under both the Schneider Electric and Telemecanique Sensors brand identities — these are the same product line. The XS618B1MAL2 catalog number is consistent across both branding presentations, so the part number is a direct cross-reference to itself regardless of which brand label appears on the ordering documentation or packaging.

What is the realistic lead time for the XS618B1MAL2 if I need it fast?

Primary North American distributors typically offer 2-3 week fulfillment for standard stock, with bulk orders of 25 or more units often shipping within 1-2 weeks. Lead times extend to 4-6 weeks during peak manufacturing periods such as Q4 production ramp-ups. The M12 connector variant (XS618B1TAL2) and custom cable length orders typically add 2-3 weeks to standard lead times. Contact LeadTime.ca directly for current stock confirmation before committing a build schedule to a specific delivery date.

Can I extend the 2m cable in the field if my routing requires a longer run?

Field splicing the pre-cabled shielded conductor is not recommended. Splicing introduces an EMI entry point into the shielded cable run, and in high-EMI factory environments — near VFDs, welding equipment, or power distribution panels — this produces false triggers and intermittent detection that can take days to diagnose. If your routing requires more than 2m, order the XS618B1TAL2 variant with the M12 connector and use industrial-rated M12 shielded extension cords, or contact your distributor for a custom cable-length order at the time of purchase.

Does the 1000Hz DC switching frequency apply when the sensor is powered from an AC supply?

No. The 1000Hz switching frequency applies in DC-powered operation only. When the sensor is powered from an AC supply within the 24-240VAC range, the switching frequency is 25Hz. If your application requires high-speed cycle detection — for example, confirming rapid part presence on a high-throughput conveyor — ensure your cabinet supplies DC voltage to achieve the 1000Hz response rate.

Why Source the XS618B1MAL2 Through LeadTime.ca

At-a-Glance Summary

  • Model: XS618B1MAL2 — OsiSense XS6 M18 cylindrical inductive proximity sensor from Schneider Electric
  • Sensing distance: 8mm — air gap must be 6-10mm for reliable detection; 4mm and 30mm variants exist for shorter and longer gaps
  • Supply voltage: 24-240V AC/DC — single part number covers mixed-voltage facilities; 12V supply requires external step-up converter
  • Output: 1 Normally Open (NO), 2-wire — contact closes on metal detection; NC and PNP variants are separate part numbers
  • Switching frequency: 1000Hz DC / 25Hz AC — DC mode supports high-cycle-rate detection applications
  • Housing: M18 x 1.5, L62mm, nickel-plated brass — flush-mount installation into standard ISO M18 bore
  • Cable: 2m pre-cabled shielded — field splicing not recommended; M12 connector variant (XS618B1TAL2) available for longer runs
  • Environmental protection: IP68 and IP69K — rated for full submersion and high-pressure washdown spray
  • Operating temperature: -25 to +70°C
  • Certifications: UL and CSA — active North American regulatory approvals
  • Typical lead time: 2-3 weeks standard; 1-2 weeks for bulk orders of 25+ units through major distributors

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