SECOR WSF41BK Recessed Black Reed Switch NC 19mm Diameter 25mm Gap

Product SKU: WSF41BK

Product Overview

The SECOR WSF41BK Recessed Black Reed Switch NC 19mm Diameter 25mm Gap is a recessed magnetic reed switch designed for compatible alarm, access control and door monitoring applications. It is specifically suited to steel doors commonly found in commercial building environments, where a secure recessed contact is required. The WSF41BK features a rugged unibody housing with flexible ribbed sides for quick, secure installation without gluing, while the magnet housing helps isolate the magnet from surrounding steel to support maximum gap performance. With a 25mm gap, 19mm diameter body, 0.2Ω maximum resistance, 10W maximum rating, 100VDC maximum voltage and 500mA maximum current, this black recessed reed switch is a practical option for commercial low-voltage security circuits requiring discreet steel door monitoring.

Key Capabilities

Best For

• Steel Door Monitoring: Designed for steel doors commonly used in commercial buildings.
• Commercial Alarm Systems: Suitable for compatible intruder alarm systems requiring recessed door contact monitoring.
• Access Control Inputs: Can be used for door status monitoring where the controller supports the required reed switch contact configuration.
• Discreet Dark-Finish Door Contacts: Ideal where a black recessed contact is preferred over a white or surface mounted contact.
• Secure Retrofit or New Builds: Practical for new commercial fit-outs or retrofit work where a 19mm recessed contact can be installed correctly.

Why Choose the WSF41BK

Choose the SECOR WSF41BK when the installation needs a black recessed reed switch designed for commercial steel door applications. Its rugged unibody housing, flexible ribbed sides and magnet isolation design make it a practical option where a secure recessed contact is required without gluing. The 25mm gap and 19mm diameter body suit compatible door and frame monitoring installations where the contact must remain discreet while still allowing practical alignment tolerance. This model, supplied by Security Wholesalers, is a useful choice for installers needing a black commercial-grade recessed reed switch for compatible low-voltage alarm and access control systems.

Buyer Decision Tips

Key Features & Technical Specifications

Ideal Use Cases

Choosing the Right Model

• Choose this model if: You need a black recessed reed switch for commercial steel doors with a 19mm diameter body and 25mm gap.
• Choose WSF41 if: The installation requires a white housing rather than black.
• Check the contact version: The WSF41BK is listed with SPST or SPDT contact options, so confirm which version is required for the system input.
• Choose a surface mount contact if: The door or frame cannot be drilled for recessed installation.
• Choose a timber-frame reed switch if: The installation is on timber frames and requires a smaller stubby contact rather than a 19mm steel door model.
• Check before installation: Confirm drilling diameter, frame depth, steel door suitability, contact configuration, circuit rating and magnet alignment.

FAQs

1. What is the SECOR WSF41BK used for?
   The SECOR WSF41BK is used as a recessed magnetic reed switch for compatible alarm and access control systems. It monitors the open or closed state of a door or protected opening, especially steel doors commonly used in commercial buildings.
2. Is the WSF41BK suitable for steel doors?
   Yes. The WSF41BK is designed specifically for steel doors commonly found in commercial building applications. Its magnet housing isolates the magnet from the surrounding steel to help achieve maximum gap distances when installed correctly.
3. What gap does the WSF41BK support?
   The WSF41BK has a listed operating gap of 25mm. Final performance depends on magnet alignment, steel door construction, frame condition and installation accuracy, so the contact should be tested after fitting.
4. Does the WSF41BK require gluing?
   The WSF41BK housing includes flexible ribbed sides for quick, secure installation without gluing. The installer should still ensure the mounting hole is correctly sized and that the contact is seated securely in the frame.
5. Is the WSF41BK normally closed?
   The product title specifies NC, while the supplied specifications list SPST or SPDT contact options. The installer should confirm the exact selected version and ensure it matches the alarm panel or access control input configuration.
6. What are the electrical ratings?
   The WSF41BK has a maximum resistance of 0.2Ω, maximum rating of 10W, maximum voltage of 100VDC and maximum current of 500mA. The connected circuit should remain within these ratings for safe and reliable operation.
7. What are the dimensions?
   The SECOR WSF41BK measures 19mm diameter x 22mm. Installers should confirm the available frame depth, drilling diameter, cable route and magnet alignment before installation, especially on steel doors and commercial frames.
8. What should I check before buying the WSF41BK?
   Before buying the WSF41BK, confirm that your system requires a recessed steel door reed switch, the 25mm gap suits the opening, and the selected SPST or SPDT contact version matches the panel input. This model is available through Security Wholesalers for compatible commercial door monitoring applications.