Inductive Proximity Sensor
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Official product documentation for SEGMENsensor inductive proximity sensors. SGI-GP, SGI-FM and SGC-GP cylindrical sensors with NPN/PNP output, flush and non-flush models. Additional series datasheets in preparation.

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Key facts

The SEGMENsensor proximity downloads page provides the inductive proximity sensor datasheet as a PDF for the SGI-GP, SGI-FM and SGC-GP families: 6.5 mm, M8, M12, M18 and M30 cylindrical sensors in flush and non-flush versions with NPN or PNP, NO or NC outputs. It lists sensing distances, outputs, supply voltages, connections, housing materials and ordering codes.

Last updated · SEGMENsensor Engineering Team

SGI-GP Series
SGI-GP Series Cylindrical Inductive Proximity Sensor

Standard 6.5 mm / M8 / M12 / M18 / M30 cylindrical inductive proximity sensors for metal detection in automation, conveyor, and machine tool applications. Shielded (flush) and unshielded (non-flush) mounting options. NPN/PNP normally-open and normally-closed outputs, plus DC 2-wire, AC and AC/DC versions; 4,060 checked part numbers.

6.5 mm / M8 / M12 / M18 / M30 NPN / PNP NO / NC Shielded & Unshielded DC 2-wire / AC/DC 10–30 VDC
Family datasheets (PDF):
More Series
Capacitive, Photoelectric & Hall Effect Sensors

SEGMENsensor also manufactures capacitive proximity sensors for non-metallic material detection, photoelectric sensors for long-range detection and color-mark sensing, and Hall effect sensors for magnetic field detection. English datasheets for these series are currently in preparation.

Capacitive Proximity Photoelectric Hall Effect Reed Switch

Datasheets in preparation. English-language datasheets for capacitive, photoelectric, Hall effect, and reed switch sensors are being finalized. Contact us at info@segmensensor.com to request a specification sheet for a specific model.

Coming Soon
Capacitive Proximity Sensor
Coming Soon
Capacitive Proximity Sensor Datasheet
Non-metallic detection · M12 / M18 / M30
English version in preparation
SEGMENsensor M18 through-beam photoelectric sensor with nickel-plated brass housing
Coming Soon
Photoelectric Sensor Datasheet
Through-beam / retro-reflective / diffuse
English version in preparation
Slot-type (fork) photoelectric sensor
Coming Soon
Hall Effect & Reed Switch Sensor Datasheet
Magnetic detection · Cylinder position sensing
English version in preparation

Need a proximity sensor specification now?

Our engineers can provide full technical specifications for any model by email — usually within 24 hours. No registration needed.

About Proximity Sensor Downloads

This page provides the complete documentation library for SEGMENsensor inductive proximity sensors. Available documents include product datasheets covering M8, M12, M18, and M30 cylindrical models, CE declarations of conformity, UKCA certificates, RoHS compliance statements, NPN/PNP wiring diagrams, dimensional drawings, and installation guides.

Engineers rely on these documents for panel design, PLC wiring, machine safety compliance, and installation planning. The wiring diagrams cover NPN sinking, PNP sourcing, normally-open, and normally-closed configurations with colour-coded cable references. Dimensional drawings show thread pitch, body length, sensing face diameter, and M12 connector pinout.

All documents are available to download — no registration required. For capacitive proximity sensor or photoelectric sensor specifications not yet listed, contact info@segmensensor.com and receive documentation within 24 hours.

Key Specifications at a Glance

Parameter Specification
Sensing Distance1 mm (6.5 mm and M8 flush) to 50 mm (M30 non-flush), SGI-GP series on mild steel
Output TypeNPN sinking / PNP sourcing; NO / NC; DC 2-wire; AC/DC (M12, M18, M30)
Protection RatingPer part number, given on the datasheet sent with the quotation
Switching FrequencyPer part number, given on the datasheet sent with the quotation
Supply Voltage10–30 V DC (NPN/PNP); 10–60 V DC (DC 2-wire); 20–250 V AC or AC/DC
HysteresisPer part number, given on the datasheet sent with the quotation
Thread SizesM8 × 1, M12 × 1, M18 × 1, M30 × 1.5

Application Notes

Inductive proximity sensors detect ferrous and non-ferrous metal targets without physical contact, delivering reliable switching in harsh industrial environments. The following applications are the most common scenarios documented in SEGMENsensor technical literature.

Conveyor and Assembly Line Object Detection: M18 and M30 inductive proximity sensors detect metal components on conveyor belts for part counting, jam detection, and positioning in automotive and electronics assembly. PNP output connects directly to PLC sourcing input modules for straightforward wiring.

Machine Tool End-of-Travel and Home Position: Flush-mount M12 sensors embedded in machine tool slides detect axis end-of-travel positions; housing material and protection rating for the coolant spray and metal chips common in CNC machining centres are selected per part number.

Welding Robot Position Feedback: SGI-WR weld-field immune inductive proximity sensors (immune to constant and alternating magnetic fields up to 150 mT) detect fixture clamp positions inside robotic welding cells. Weld-immune ratings prevent false triggering from high-current magnetic fields generated during MIG and resistance welding operations.

FAQ

Proximity Sensor Downloads — FAQ

What documents are included for proximity sensors?
Each product page provides datasheets, CE/UKCA declarations, RoHS certificates, NPN/PNP wiring diagrams, and dimensional drawings in PDF format.
Do datasheets show NPN and PNP wiring diagrams?
Yes. All inductive proximity sensor datasheets include separate NPN and PNP wiring diagrams with colour-coded cable guides and PLC connection examples.
Are there datasheets for flush-mount proximity sensors?
Yes. The family datasheet covers flush-mountable (shielded) and non-flush (unshielded) part numbers with their sensing distances, and each part-number table row can create a one-page PDF datasheet.
What sensing distances are listed?
General-purpose SGI-GP part numbers are rated from 1 mm (6.5 mm and M8 flush) to 50 mm (M30 non-flush) on mild steel. Every part number and its distance is listed in the part-number CSV.
Is IP rating documentation available?
The protection rating of each part number is given on the datasheet sent with the quotation; certificates for a specific model are available on request.
What is the difference between NPN and PNP output?
NPN (sinking) outputs pull the signal line to 0 V when activated — used with PLCs that have sourcing (PNP) inputs. PNP (sourcing) outputs supply +V to the signal line when activated — used with PLCs that have sinking (NPN) inputs. Both wiring configurations are illustrated in every proximity sensor datasheet.
What sensing distances are available per thread size?
Rated SGI-GP sensing distances on mild steel: 6.5 mm and M8 — 1–4 mm flush, 2–8 mm non-flush; M12 — 2–8 mm flush, 4–12 mm non-flush; M18 — 5–15 mm flush, 8–23 mm non-flush; M30 — 10–25 mm flush, 15–50 mm non-flush.
Are the proximity sensors weld-immune?
Not the general-purpose SGI-GP series, which is for normal machine surroundings. For welding cells use the SGI-WR weld-field immune series (M8, M12, M18, M30), which is immune to constant and alternating magnetic fields up to 150 mT and has a PTFE-coated brass housing.
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