Radionix Small Commercial Wide Gap Door Contact ISN-CSM20-WGW, Closed Loop, White
Know the moment the door moves.
A wired, surface-mount magnetic door contact that signals your alarm system when a protected door opens. The wide gap suits commercial steel doors.

An alarm zone only works if it notices the door.
A magnetic contact is a switch plus a magnet. When the door moves and the magnet separates from the switch, the contact changes state and the panel registers the zone as open.
Built for commercial door openings
A closed loop contact with a wide gap and wire leads, made for hardwired alarm zones.
Closed loop contact
Closed loop contact type with an N.C. configuration for hardwired alarm zones.

Standard gap
The standard gap between the contact and the magnet.
Ideal for steel doors
Listed by the manufacturer as ideal for steel doors.
Wide gap design
The wide gap deters swinging, and the standard gap is 2.5".
Surface mount, wire leads
Surface mounting with 18" wire leads for connecting to your zone wiring.
Everything you need to know.
| Brand | Radionix |
| Model | ISN-CSM20-WGW |
| Contact Type | Closed Loop |
| Contact Configuration | N.C. |
| Contact Resistance | 150 Kilo Ohm |
| Standard Gap | 2.5" |
| Mounting Type | Surface Mount |
| Termination Style | Wire Leads |
| Lead Length | 18" |
| Width | 4.1" |
| Height | 0.6" |
| Color | White |
Radionix Small Commercial Wide Gap Door Contact ISN-CSM20-WGW, Closed Loop, White
The Radionix ISN-CSM20-WGW is a magnetic door contact (Radionix ISN-CSM20-WG 2" Wide Gap Small Contact, Closed Loop, White). It signals the alarm system when a protected door or window opens, and is aimed at installers protecting residential and commercial openings.
Magnetic contacts are made of a switch and a magnet mounted on the frame and the door or window. When the opening moves and the magnet separates from the switch, the contact changes state and the alarm panel registers the zone as open.
Key Features
- Closed loop.
- Ideal for steel doors.
- Wide gap deters swinging.
Specifications
- Brand: Radionix
- Model: ISN-CSM20-WGW
- Product Type: Magnetic Contact
- Connectivity Technology: Wired
- Contact Configuration: N.C.
- Contact Resistance: 150 Kilo Ohm
- Lead Length: 18"
- Mounting Type: Surface Mount
- Recommended Use: Door
- Standard Gap: 2.5"
- Termination Style: Wire Leads
- Color: White
- Depth: 0.6"
- Height: 0.6"
- Width: 4.1"
- Input Current: 1 A
- Input Voltage: 100V DC
- Power Source: AC
- Contact Type: Closed Loop
- Installation Type: Commercial
- Certifications & Standards: CE, UL
- Package Contents: White Commercial Contact, 1 x Contact, 1 x Magnet
- Shipping weight: 0.18 lb
Typical Uses
- Door and window perimeter protection
- Commercial doors, frames and openings
- Hardwired alarm system zones
Before ordering, confirm that this part matches your control panel, detector or system model and the wiring or frequency in use. Check the specifications above and the installation guide for your system.
Need help with compatibility?
Looking for a manufacturer part number, compatible replacement, or quantity order? Contact Raztechs for sourcing and quote support.

Radionix ISN-CSM20-WGW, ready to order.
- 1 x Contact
- 1 x Magnet
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