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Web Guide Sensors

PS-400S photoelectric sensor

PS-400S

Visible-light photoelectric sensor for stable edge tracking on opaque and transparent film.

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US-series ultrasonic sensors

US-500S / US-400S

Ultrasonic sensor family for non-breathable materials, unaffected by transparency.

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HCCD and color mark sensors

HCCD / PS-260 / PS-261

High-precision camera and color mark sensors for line, edge and registration detection.

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Sensor selection guide

Find the right sensor for your web

Start with the guiding method, then check the material or detection target.

Edge guiding A fork sensor detects one moving web edge. Sensor Web Web travel
Edge guiding
Centre guiding Two fork sensors detect the two edges of a moving web. Sensor Sensor Web Web travel
Centre guiding
Line or mark guiding An optical sensor reads a printed line or registration mark on a moving web. Line / mark Sensor Web Web travel
Line / mark guiding

Guiding method

Guiding method compatibility
Sensor model Edge guiding Centre guiding Line / mark guiding
HCCD
PS-260 / PS-261
US-400 / US-500
PS-400 / PS-500

Material or detection target

Material compatibility
Material or target HCCD PS-260 / PS-261 US-400 / US-500 PS-400 / PS-500
Transparent film
Opaque film
Paper / paperboard
Foil / metallized web
Metal sheet
Textile / woven web
Fabric / breathable web
Photosensitive film
Dust-prone environment

Engineering Selection

Application fit, integration and quoting guidance

Before finalizing a product category, review how the component will be installed and how operators will use it during production. Industrial web handling equipment often runs different materials on the same machine, so the selected component must be stable across normal speed changes, startup conditions and material changeovers. For retrofit projects, panel space, mounting space, wiring distance and existing control logic can be just as important as the nominal product specification.

In a new OEM machine build, KRD recommends defining the control objective first: stable unwind tension, accurate process-zone tension, edge guiding before printing, center guiding before slitting, sensor replacement, actuator movement or integrated EPC correction. Once the objective is clear, the selection can be narrowed by web width, material type, required accuracy, line speed, available correction stroke and electrical interface.

When requesting a quote, include machine photos or drawings if available. Useful information includes material samples, web width range, maximum speed, roller diameter, desired correction location, current pain point and whether the machine uses PLC control. These details help KRD Automation recommend a product that fits the real production line instead of only matching a catalogue category.

Industrial selection factors

Product selection should account for the full production environment, not only the catalogue name. Important factors include material behaviour, normal and peak line speed, machine vibration, available mounting space, operator adjustment habits and how often the line changes material. These details influence whether the best solution is a simple replacement component, a closed-loop control package, a sensor upgrade or a complete matched assembly.

In packaging, printing, film, foil and battery material production, small control errors can create waste quickly. A stable component choice should reduce startup scrap, improve repeatability between shifts and make troubleshooting easier for maintenance teams. KRD Automation can help review the application and recommend a practical path for new machine builds or retrofit projects.

Quotation checklist

For a reliable quotation, include the material type, web width range, operating speed, required accuracy, current machine layout and the reason for the upgrade. If the component will replace an existing part, include the current model number and photos of the installation area.

This information helps KRD confirm whether the selected category is the right starting point and whether the application needs a standard catalogue product, a matched control package or a customized mechanical configuration.

Project review note

For engineering review, KRD recommends documenting the current machine issue, expected production improvement and any space or electrical limitations before final selection. This makes it easier to compare product options and avoid mismatches between catalogue specifications and real operating conditions on the production floor.