KEYENCE FS-V21 Photoelectric switch

KEYENCE FS-V21 Photoelectric switch

KEYENCE FS-V21 is an industrial Sensors for automation and equipment control applications.

Key Features

• KEYENCE FS-V21 is suitable for replacing a sensor or switch with matching model code and electrical interface.

• Prepared for applications that need stable feedback, clear installation position and repeatable machine signals.

• Helps compare connector style, voltage range and detection surface before installation.

Technical Data

Product Inspection

After receiving the product, check the appearance, label, interface, mounting holes and included accessories before installation. For pneumatic or electrical components, the thread, sealing surface, wiring end and moving area should also be reviewed. A simple inspection before fitting can identify possible transport damage, model selection mistakes or missing accessories early.

Model Matching

Model matching should be based on the full code rather than only a few visible characters. Products in the same series may have similar appearance but different suffixes, port sizes, voltage options or mounting styles. Checking the old part label, equipment manual, purchase record and installation position together can improve matching accuracy and help avoid unnecessary return or rework.

Our Service Advantages

We support global industrial automation spare parts supply and can arrange international shipment by FedEx, UPS, DHL or other suitable express services according to order requirements. For model confirmation, replacement suggestions, photo comparison and basic technical questions, we try to reply within 24 hours. If the customer is not sure whether the part is suitable, old nameplate photos or equipment pictures can be provided for preliminary checking.

Application Notes

KEYENCE FS-V21 Photoelectric switch is intended for industrial equipment maintenance, automation repair and spare part replacement where the exact KEYENCE model reference is important. When this sensing component is used on automated equipment, compare the model code, cable or plug arrangement, voltage range and mounting dimensions with the original device. Check the detection surface and adjustment position after installation. For this specific listing, use the model code, brand marking and product photos together to confirm the replacement match. Before ordering or installing model FS-V21, compare the full nameplate information with the existing component, including the listed specification, port or mounting details, electrical data, pressure range and operating environment. During installation, isolate the machine safely, remove pressure or power according to site procedure, and check that seals, fittings, cables and fasteners are clean and correctly seated. After replacement, test the equipment at low speed or low pressure first, then confirm normal operation, leakage condition, response timing and repeatability before returning the machine to continuous production.

Specification Overview

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