GRI 28A-B Surface Mount Magnetic Reed Switch Set, Closed Loop, Standard Gap up to 1", Concealed Terminals, Brown
Special Order: typically 2–6 weeks
Ships directly from the manufacturer. This is an estimated lead time, not a guaranteed delivery date.
Availability can change and lead times may be longer. If your project has a deadline, check with us before ordering.
A member of our team will check with the manufacturer and personally reply by email.
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Key Features
- Reliable closed-loop perimeter monitoring for doors and windows, reducing false alarms and simplifying site supervision
- Surface-mount design with concealed screw terminals for fast, tamper-resistant installation on metal or wood frames
- Standard 1" gap (up to 1") and Form A (N.O.) contact ensure broad compatibility with alarm panels and access control systems
- UL listed, steel construction and lifetime warranty for long-term performance in commercial and industrial environments
- Brown finish blends with wood and darker frames for discreet security integration with surveillance and monitoring systems
Quick Specifications
- Product Model
- 28A-B
- Brand Name
- George Risk Industries
- Product Name
- 28A-B Magnetic Contact
- Product Type
- Magnetic Contact
Frequently Bought Together
GRI 28A-B Surface Mount Magnetic Reed Switch Set, Closed Loop, Standard Gap up to 1", Concealed Terminals, Brown
$4.09
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Total: $49.80
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Product information
28A-B
Overview
Deliver dependable perimeter security without installation headaches. The George Risk Industries GRI 28A-B surface mount magnetic contact set provides closed-loop intrusion monitoring that integrates easily with alarm panels, access control and surveillance systems. Built for commercial and industrial use, its standard 1" gap and Form A (N.O.) contact make it compatible with most wired security architectures, while concealed screw terminals reduce tamper exposure and present a clean, professional installation.
Constructed of steel with UL/ULC recognition and backed by a lifetime warranty, the 28A-B is engineered for long service life in high-traffic environments. The surface-mount profile and included covers, spacers and hardware speed up field installs, and the brown finish offers a discreet option for wood doors and darker frames. Whether you’re deploying perimeter sensors, door contacts for access control, or integration points for CCTV-triggered events, the GRI 28A-B delivers reliable, industry-standard performance.
Specify the GRI 28A-B for your next intrusion detection or access-control deployment — contact us to order or request technical support for system integration.
Features
- Reliable closed-loop perimeter monitoring for doors and windows, reducing false alarms and simplifying site supervision
- Surface-mount design with concealed screw terminals for fast, tamper-resistant installation on metal or wood frames
- Standard 1" gap (up to 1") and Form A (N.O.) contact ensure broad compatibility with alarm panels and access control systems
- UL listed, steel construction and lifetime warranty for long-term performance in commercial and industrial environments
- Brown finish blends with wood and darker frames for discreet security integration with surveillance and monitoring systems
| General Information | |
|---|---|
| Brand Name | George Risk Industries |
| Manufacturer | George Risk Industries |
| Product Name | 28A-B Magnetic Contact |
| Product Type | Magnetic Contact |
| Product Model | 28A-B |
| Product Series | 28 |
| Manufacturer Part Number | 28A-B |
| Technical Information | |
| Material | Steel |
| Contact Form | Form A |
| Standard Gap | 1" |
| Application/Usage | Commercial, Industrial |
| Termination Style | Screw Terminal |
| Connectivity Technology | Wired |
| Physical Characteristics | |
| Color | Brown |
| Power Description | |
| Power Source | DC |
| Product Information | |
| Mount Type | Surface Mount |
| Contact Type | N.O. |
| Installation Type | Commercial |
| Warranty | |
| Limited Warranty | Lifetime Warranty |
| Miscellaneous | |
| Features | End of Line (EOL) Resistor |
| Country of Origin | US |
| Certifications & Standards | UL, ULC |
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Is this right for your project?
Confirm the model, required accessories and delivery needs before ordering.
- SKU:
- 28A-B
- Manufacturer part:
- 28A-B
How do I confirm compatibility?
Check the specifications and manufacturer documents for your existing system. Send us your model numbers and project requirements if you need help selecting equipment or accessories.
Ask a product specialistWhen will this item ship?
Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.
Shipping, freight and delivery detailsWhat should I know about returns?
Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.
Read return eligibility and exclusionsGRI 28A-B Surface Mount Magnetic Reed Switch Set, Closed Loop, Standard Gap up to 1", Concealed Terminals, Brown
28A-B