SN04 / TL-W5E1 Series Square Inductive Proximity Switch

Name: SN04 / TL-W5E1 Series Square Inductive Proximity Switch
Brand: DAIDISIKE
SKU: sn04-tl-w5e1-series-square-inductive-proximity-switch
Availability: InStock

Compact square-body inductive proximity switch, 4-7mm sensing distance, selectable NPN/PNP and NO/NC output.

SN04 / TL-W5E1 Series Square Inductive Proximity Switch - dimensional drawing

🔍 Click to enlarge · 1/6

Technical Specifications

Detection Method	Inductive
Body Shape	Square (SN04: 18x18x34mm cube body; TL-W5: 42x25x10mm flat body)
Sensing Distance	SN04: 4mm; TL-W5E: 5mm; TL-W5F: 7mm
Output Type	NPN / PNP
Switching Logic	NO (suffix 1) / NC (suffix 2)
Working Voltage	DC12-24V
Working Temperature	-25C to +55C
Housing Material	ABS
Wiring	DC 3-wire (BN=+, BU=-, BK=signal); 4-wire NO+NC dual-output wiring documented (BN/BK/WH/BU)
Mounting Holes (TL-W5)	2 x Phi3.5mm
Cable Length (TL-W5E1)	50mm output cable after 15.5mm lead-out
Status Indicator	Built-in LED (SN04 and TL-W5E1 bodies)

Overview

SN04 and TL-W5 are two related square-body inductive proximity switch models covering short sensing distances, built for machine builders, panel integrators, and OEMs who need a compact sensor for position and limit detection in automation equipment. SN04 is an 18x18x34mm cube-style body with a rounded sensing face and integral cable, rated for a 4mm sensing distance. TL-W5E1/F1/E2/F2 is a flatter, thinner rectangular body (42x25x10mm) with two Phi3.5mm mounting holes and a 50mm output cable, rated for 5mm (E suffix) or 7mm (F suffix) sensing distance.

Both series detect the presence of a metallic target without physical contact, and every model is offered in NPN or PNP output with normally-open (NO, suffix 1) or normally-closed (NC, suffix 2) switching logic. The published selection table lists a DC12-24V working voltage, a working temperature range of -25C to +55C, and ABS housing material, with a built-in LED status indicator on both SN04 and TL-W5E1 bodies for on-site confirmation during commissioning.

Features & Benefits

Compact Square Footprint for Tight Installation Spaces

SN04's 18x18x34mm body and TL-W5's slim 42x25x10mm body both suit panels or fixtures where a standard threaded barrel sensor won't fit.

Selectable NPN or PNP Output

Every model in the family is offered in both NPN and PNP variants (e.g. SN04N1/SN04P1, TL-W5E1/TL-W5F1), letting customers match the sensor to their existing PLC input card sinking or sourcing type without redesigning wiring.

NO or NC Logic to Match Control-Logic Needs

Suffix '1' gives normally-open (NO) output and suffix '2' gives normally-closed (NC) output across the family, so the same sensor family can serve either standard trigger logic or fail-safe wiring.

Two Documented Sensing Distances in the TL-W5 Sub-Series

TL-W5E (5mm) and TL-W5F (7mm) give customers a distance option within the same compact body style, useful when target-to-sensor gap tolerance varies slightly between installations.

Clear Color-Coded DC Wiring

The published wiring diagram defines brown (BN) = positive, blue (BU) = negative, black (BK) = NO signal, and white (WH) = NC signal, used together in the dual NO+NC variant, reducing wiring errors during installation.

Visual LED Status Indicator

Both SN04 and TL-W5E1 bodies include a built-in LED on the housing, marked on the dimension drawings, for on-site confirmation of switching state during commissioning and troubleshooting.

DC12-24V Supply Compatible with Standard Automation Power Rails

The published spec table lists a DC12-24V working voltage, matching the common 24VDC control power used in most industrial panels.

Applications

PLC Limit/Position Feedback on Small Fixtures — Short sensing distance (4-7mm) plus a compact square housing suits space-limited positioning points, and NPN/PNP output can be matched directly to the PLC input card.

Cylinder or Slide End-of-Travel Detection — Non-contact detection of a metal target plate on a cylinder or slide avoids the mechanical wear associated with contact-type limit switches.

Conveyor or Indexing Table Metal Part Presence Check — The short sensing distance suits close-mounted detection of whether a metal workpiece is present or in position on a conveyor or indexing table.

Automation Panel and Control Cabinet Integration — The compact body and clearly color-coded wiring make the sensor easy to integrate into panel wiring for internal signal detection points.

Machine Tool Safety/Interlock Position Sensing — Selectable NO or NC logic covers the signal polarity requirements of different interlock circuits used in machine tool safety wiring.

OEM Equipment Requiring a Compact Sensor Replacement — The small square body can replace older or damaged sensors in equipment with limited installation space.

General Metal Target Detection in Light Industrial Equipment — The inductive sensing principle suits detection of a range of metal targets without needing to touch the object.

Models & Ordering Information

SN04 Series (Square Cube Body, 4mm Sensing Distance)

SN04N1SN04P1SN04N2SN04P2

N = NPN output, P = PNP output; suffix 1 = normally-open (NO), suffix 2 = normally-closed (NC).

TL-W5 Series (Flat Body, Screw-Mountable)

TL-W5E1TL-W5F1TL-W5E2TL-W5F2

E = 5mm sensing distance, F = 7mm sensing distance; suffix 1 = normally-open (NO), suffix 2 = normally-closed (NC).

How to Select

Choose SN04 for the smallest cube body with the shortest sensing distance (18x18x34mm, 4mm).
Choose TL-W5 for a flatter, screw-mountable body with a choice of two sensing distances.
Within TL-W5, select the E suffix for 5mm sensing distance or the F suffix for 7mm sensing distance.
Select N (NPN) or P (PNP) output to match your PLC input card's sinking or sourcing type.
Select suffix 1 for normally-open (NO) output, or suffix 2 for normally-closed (NC) output.
Confirm which specific part numbers support the 4-wire NO+NC dual-output wiring configuration with the factory before quoting.
Confirm the DC12-24V supply matches your control cabinet power and that the operating temperature range (-25C to +55C) suits the installation site.

📘 Need the full method? How to Choose a Proximity Sensor · NPN vs PNP Sensor Outputs Explained

When NOT to specify the SN04 — and what to use instead

Washdown, dusty, or wet outdoor installations

Why not: No ingress protection (IP) rating is published in the current spec table for the SN04/TL-W5 series.

Use instead: Confirm the IP rating with the factory, or use a series in this catalog with a documented IP67 rating, such as the Q25/Q30/Q40 square series or the M8/M12/M18/M30 DC 2-wire series.

Detecting plastic, liquid, or other non-metallic targets

Why not: SN04 and TL-W5 are inductive switches, which respond only to metallic targets.

Use instead: A capacitive proximity sensor such as the Q20 square capacitive switch or the RS series.

Specifying a dual NO+NC (4-wire) output variant without checking availability first

Why not: The selection guide explicitly states that which part numbers support the 4-wire NO+NC dual-output wiring configuration must be confirmed with the factory before quoting.

Use instead: Confirm dual-output part number availability with the factory first, or specify a single NO or NC variant, which is fully documented.

Fast-cycling applications that require a documented switching frequency

Why not: No switching frequency or response time figure is published for the SN04/TL-W5 series in the current spec table.

Use instead: Confirm switching frequency with the factory, or use the Q25/Q30/Q40 series, which documents 500Hz/0.5ms response.

Machine guarding or personnel-safety interlocking

Why not: This is a standard non-contact position sensor with no safety rating or safety category listed in its specifications.

Use instead: a dedicated safety interlock switch (e.g. the DX-series safety door switch) or a safety light curtain

Specifications we do not publish yet

We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.

Ingress protection (IP) rating
Switching frequency / response time
Short-circuit and overload protection
Non-ferrous correction factor
MTBF (mean time between failures)
SN04 cable length
Certification status (CE/UL/RoHS, etc.)

Frequently Asked Questions

What is the sensing distance of the SN04 inductive proximity switch?

Per the selection table, SN04 has a rated sensing distance of 4mm.

What sensing distances are available in the TL-W5 series?

The TL-W5 series offers two sensing distances: 5mm for the 'E' suffix models (TL-W5E1/E2) and 7mm for the 'F' suffix models (TL-W5F1/F2).

What is the difference between the '1' and '2' suffix in the model number?

Suffix '1' denotes normally-open (NO) output, and suffix '2' denotes normally-closed (NC) output, per the family naming rule documented in the selection table.

What output types are available, NPN or PNP?

Both series are offered in NPN and PNP output variants, allowing direct matching to sinking or sourcing PLC input cards.

What is the working voltage of these sensors?

The published selection table lists a working voltage of DC12-24V.

What is the working temperature range?

The published selection table lists a working temperature range of -25C to +55C.

What are the physical dimensions of the SN04 and TL-W5E1 bodies?

SN04 measures 18x18x34mm with an 18mm-diameter round sensing face. TL-W5E1 measures 42x25x10mm (length x height x depth), with two Phi3.5mm mounting holes and a 50mm cable after a 15.5mm lead-out.

What wire colors are used, and what do they mean?

Per the published wiring diagram: brown (BN) = positive supply, blue (BU) = negative supply, black (BK) = normally-open (NO) switching signal, and white (WH) = normally-closed (NC) switching signal, used together with black in dual NO+NC output variants.

What housing material is the sensor made of?

The selection table lists ABS as the housing material for the models shown in this series.

Does the sensor have a status indicator?

Yes. The dimension drawings for both SN04 and TL-W5E1 show a built-in LED indicator on the housing.

Can you provide certification documents for this sensor?

Certification documents are available on request.

Works Well Together

On the same machine or line, SN04 is typically ordered together with: Photoelectric Sensors · Relay & Timer Modules · Laser Switch Sensors

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