Product SKU: WSF41
Product Overview
The SECOR WSF41 Recessed White 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 WSF41 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 white recessed reed switch is a practical option for commercial low-voltage security circuits requiring discreet steel door monitoring.
Key Capabilities
Recessed Steel Door Contact
The WSF41 is designed specifically for steel doors commonly used in commercial building applications.
25mm Operating Gap
The listed 25mm gap supports practical alignment tolerance for suitable recessed door and frame monitoring installations.
Flexible Ribbed Housing
The unique housing design includes flexible ribbed sides for quick, secure installation without gluing.
Magnet Isolation Design
The magnet housing isolates the magnet from surrounding steel to help maintain maximum gap distances in steel door applications.
Rugged Unibody Construction
The rugged unibody design provides a secure recessed reed switch body for commercial door monitoring installations.
Low-Voltage Security Circuit Use
The listed ratings suit compatible low-voltage monitoring circuits where voltage, current and load remain within the specified limits.
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 Door Contacts: Ideal where a recessed installation is preferred over a 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 WSF41
Choose the SECOR WSF41 when the installation needs a 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 commercial-grade recessed reed switch for compatible low-voltage alarm and access control systems.
Buyer Decision Tips
Buyer Tip: Confirm the required contact configuration before ordering. The WSF41 is listed with SPST or SPDT contact options, so the installed version should match the alarm panel or access control input requirements.
Buyer Tip: Check the door and frame before installation. The WSF41 requires a 19mm diameter recessed mounting point, and correct magnet alignment is essential for reliable operation.
Key Features & Technical Specifications
| Product Type | Recessed magnetic reed switch. |
| Model | WSF41. |
| Brand | SECOR. |
| Colour | White. |
| Mounting Type | Recessed / flush mount. |
| Recommended Door Type | Steel doors commonly found in commercial building applications. |
| Housing Design | Rugged unibody construction with flexible ribbed sides for secure installation without gluing. |
| Magnet Housing | Designed to isolate the magnet from surrounding steel for maximum gap distances. |
| Gap | 25mm. |
| Contact | SPST or SPDT, depending on selected contact version. |
| Maximum Resistance | 0.2Ω. |
| Maximum Rating | 10W. |
| Maximum Voltage | 100VDC. |
| Maximum Current | 500mA. |
| Dimensions | 19mm diameter x 22mm. |
| Typical Use | Steel door, commercial door and protected opening monitoring for compatible alarm and access control systems. |
Ideal Use Cases
Commercial Steel Doors
Use where compatible alarm systems require recessed monitoring on steel commercial doors.
Access-Controlled Doors
Suitable as a door status input where the controller supports the selected reed switch contact type.
Discreet Door Monitoring
A recessed contact helps reduce visible hardware compared with a surface mount reed switch.
Commercial Building Fit-Outs
Practical for offices, warehouses, schools, medical suites, retail sites and service areas with steel doors.
Secure Recessed Installation
Flexible ribbed sides help provide a secure fit without gluing when installed into a suitable mounting hole.
Steel Frame Applications
The magnet housing helps isolate the magnet from surrounding steel to support maximum gap performance.
Choosing the Right Model
- Choose this model if: You need a recessed white reed switch for commercial steel doors with a 19mm diameter body and 25mm gap.
- Check the contact version: The WSF41 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
- What is the SECOR WSF41 used for?
The SECOR WSF41 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. - Is the WSF41 suitable for steel doors?
Yes. The WSF41 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. - What gap does the WSF41 support?
The WSF41 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. - Does the WSF41 require gluing?
The WSF41 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. - Is the WSF41 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. - What are the electrical ratings?
The WSF41 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. - What are the dimensions?
The SECOR WSF41 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. - What should I check before buying the WSF41?
Before buying the WSF41, 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.

















