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FR 521-K21 Pizzato Position switch, coil spring with cat’s whisker
Pizzato FR521-K21 position switch with coil spring cat’s whisker actuator, 1NO + 1NC contacts, snap-action switching, external gasket and IP67 protection for industrial automation.
£9.90
Why Choose the Pizzato FR521-K21 Position Switch?
The Pizzato FR521-K21 is a reliable and rugged industrial position switch designed for precise mechanical detection in automation systems, industrial machinery and control applications. As part of the trusted Pizzato FR Series, this limit switch features a coil spring with cat's whisker actuator, providing flexible and dependable position sensing for demanding industrial environments.
The FR521-K21 combines a durable technopolymer housing with a compact industrial design and a 1NO+1NC snap action contact block for reliable electrical switching. It is engineered for machine builders and automation professionals requiring long service life, accurate detection and simple integration into industrial control circuits.
Featuring an IP67 protection rating, a PG13.5 threaded conduit entry, external gasket and cable gland compatibility for 6–12 mm cables, the Pizzato FR521-K21 is suitable for environments exposed to dust, moisture and mechanical stress. The spring rod with wire tip actuator enables reliable detection of moving machine components and mechanical positions.
Key Advantages
- Reliable industrial position switch for automation applications.
- Coil spring with cat's whisker actuator for flexible mechanical sensing.
- 1NO+1NC snap action contacts for versatile industrial control circuits.
- IP67 protection rating for resistance against dust and water ingress.
- Durable technopolymer housing designed for industrial environments.
- Compact FR Series construction simplifies machine installation.
Key Features
- Pizzato FR Series position switch.
- Model: FR521-K21.
- Actuator type: Coil spring with cat's whisker / spring rod with wire tip.
- Contact block: 1NO+1NC snap action.
- Housing material: Technopolymer.
- Connection: PG13.5 threaded conduit entry.
- Cable gland: Suitable for cables 6–12 mm.
- Protection rating: IP67 according to EN 60529.
- External components: Zinc-plated steel.
Reliable Position Detection for Industrial Automation
Mechanical position switches such as the Pizzato FR521-K21 provide dependable feedback by detecting the movement and position of machine components. When the actuator is operated, the internal snap action contacts change state to provide a reliable electrical signal for automation controllers and industrial systems.
The FR Series is designed for applications requiring reliable switching, durable construction and flexible actuator configurations. The FR521-K21 delivers consistent performance for OEM machinery, production equipment and industrial automation systems.
Typical Applications
- Industrial automation machinery.
- Machine position monitoring systems.
- Packaging and production equipment.
- Conveyor and material handling systems.
- Manufacturing and processing machinery.
- OEM machine building applications.
Technical Specifications
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| Device Type | Limit switch | |
|---|---|---|
| Housing Material | Technopolymer | |
| Switching Action | Snap action | |
| IP Rating | IP67 | |
| Contacts | 1NO + 1NC | |
| Actuator Type | Spring rod / wobble stick | |
| Connection | PG13.5 cable entry | |
| Series | FR Series | |
| Product type | Position / limit switch | |
| Contact configuration | 1NO + 1NC | |
| Switching mechanism | Snap-action | |
| Actuator type | Coil spring with wire tip (cat’s whisker) | |
| Housing material | Technopolymer | |
| External parts | Zinc-plated steel | |
| Protection rating | IP67 | |
| Conduit entry | PG13.5 | |
| Cable compatibility | approx. 6–12 mm diameter | |
| Rated current | up to 10 A | |
| Operating temperature | approx. -25 °C to +80 °C | |
| HS Code | 85369095 |
Frequently Asked Questions
What is the Pizzato FR521-K21 used for?
The FR521-K21 is used for detecting mechanical positions in industrial machinery, automation systems and electrical control applications.
What actuator does the FR521-K21 use?
The switch uses a coil spring with cat's whisker actuator for flexible and reliable position detection.
What contact configuration is included?
The Pizzato FR521-K21 features a 1NO+1NC snap action contact block for versatile industrial switching applications.
Is the Pizzato FR521-K21 suitable for harsh environments?
Yes. The FR521-K21 features an IP67 protection rating, providing resistance against dust and water ingress when correctly installed.
What conduit connection does this switch use?
The FR521-K21 uses a PG13.5 threaded conduit entry for electrical installation.
Trusted by Industrial Automation Professionals
Pizzato FR Series position switches are widely used by machine builders and automation engineers for reliable mechanical detection, durable construction and consistent switching performance in industrial environments.
