Malaysia Factory Retrofit Case | HongSton Integrated Industry & Trade LS8 Inductive Proximity Sensor Selection & Field Application

1. Brief Introduction to Proximity Switches

As non-contact position sensing components, proximity switches are widely installed on automated machinery and equipment. They output switching signals once targets reach the rated sensing distance to realize automatic control such as limit positioning, part counting and position detection. Compared with mechanical limit switches, they avoid physical contact abrasion and feature superior stability and service life, becoming essential spare parts for Malaysia’s processing and packaging industries.

2. Functions & Working Principles of Four Main Types

Proximity switches perform the same limit function as mechanical travel switches and are categorized by sensing principles:

1. Inductive type: Built with magnetic core coils for metal-only detection. HongSton LS8 is our flagship model of this category.
2. Capacitive type: Triggered by capacitance changes; detects metals, plastics, liquids and glass with relatively larger body size.
3. Hall magnetic type: Works on the Hall effect and only senses magnetized objects.
4. Photoelectric type: Detects objects via light blocking or reflection, available in through-beam, diffuse and retro-reflective styles for long-distance sorting.

3. Selection Guide & Advantages of Integrated Industry & Trade

HongSton is an integrated manufacturer combining production and sales. We develop and produce all sensors in our own factory and sell products directly to customers. OEM & ODM customization services are not available. We supply in-stock goods straight to factories across Malaysia.

Core selection rules

• Choose inductive LS8 for metal detection; capacitive switches for non-metal & liquid; Hall switches for magnetic workpieces; photoelectric switches for long-distance sorting.
• Cylindrical threaded housing is the most popular in Malaysian workshops; confirm sensing range, NPN/PNP output and NO/NC contact configuration before purchase.

Key specs of HongSton LS8 (Core selling model for Malaysia market)

All-metal housing with IP67 protection to cope with Malaysia’s humid and dusty production environment. Rated operating voltage: 10–30VDC, dual sensing distance 1mm/2mm, optional NPN/PNP output plus NO/NC/NO+NC signal modes. Available in flush/non-flush mounting and cable/connector outlet options. With 1KHz high response frequency and low power consumption below 15mA, it is fully compatible with mainstream PLC brands including Siemens and Mitsubishi widely used in Malaysian factories.

4. Standard Wiring Rules

2-wire, 3-wire and 4-wire DC proximity switches are commonly used in Malaysia, where both Japan-style NPN and Europe-style PNP control systems exist.

Standard wire definition: BN(Brown)=Positive, BU(Blue)=0V Negative, BK(Black)=Signal output.

• 2-wire: Swap positive and negative wiring according to high/low level requirements.
• 3-wire: NPN connects load to power positive; PNP connects load to power negative.
• 4-wire: Equipped with an extra set of NO/NC contacts based on 3-wire structure.

Quick identification tip: Current flows from load to sensor for NPN; current flows from sensor to load for PNP.

5. Three Local Application Cases in Malaysia (Direct factory supply from our integrated production base)

1. Metal detection for hardware machine toolsA hardware processing factory in Johor, Malaysia upgraded its production stations and adopted bulk HongSton LS8 (2mm, NPN-NO) for ferrous workpiece position detection. Goods were delivered directly from our factory warehouse. After replacement, false triggering on production stations dropped significantly.
2. PVC shortage alarm on packaging lineA local Malaysian packaging plant uses capacitive proximity switches to check incoming PVC materials. Since the warning lamp draws excessive current, an intermediate relay is added between the sensor and alarm lamp for load conversion.
3. Mixed wiring project for PLC-controlled production lineExisting equipment is fitted with both 2-wire NPN and 3-wire PNP sensors connected to Siemens S7-200 SMART PLC. Separate COM terminals on the PLC are grouped for different signal types to avoid level conflict. HongSton’s technical team provides free wiring guidance for clients.