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Two white cylindrical recessed magnetic door sensors with short wires

Unique-Bargains

Unique-Bargains RC-33 NC Recessed Magnetic Door Contact Sensor 2pcs 15-25mm 0.5A White

SKU CH-ENV7-A8YYJ MPN RC-33

Two recessed magnetic contacts sense door closure at 15-25mm and switch up to 0.5A for any alarm system

  • TypeSurveillance - Home Safety & Security
  • Normally closed circuit activates when door is shut
  • 15 to 25mm sensing range covers standard door gaps
  • 5 amp switching capacity suits alarm panel inputs
  • Recessed ABS housing installs flush in metal or wood
  • Two sensors included for protecting multiple entry points

Recessed Magnetic Door Contact Sensor

The Unique-Bargains RC-33 is a normally closed reed switch sold as a two-piece set for residential or commercial alarm loops. Each white ABS housing contains a magnet and sensor pair that closes the circuit when the door or window is shut. A 25 cm 1007UL #24AWG lead on every unit connects directly to access-control panels or burglar alarm boards.

Simple Recessed Installation

Drill a 17.5 mm by 10.6 mm hole in the frame and embed the sensor so its face sits flush; the magnet mounts on the moving leaf within the 15 to 25 mm actuation band. The thin 24 AWG wires route easily through narrow cavities but carry only 0.5 A at up to 10 W, so they must not be used to switch mains loads or long cable runs without a relay. Misalignment beyond the stated gap will keep the circuit open and prevent arming.

Suits Wired Perimeter Loops

Ideal for installers adding discrete point protection to metal doors and windows on existing hard-wired panels. Not suited for wireless DIY kits, battery-powered sensors, smart-home hubs that require encrypted radio protocols, or any application needing a normally open contact or a switching current above half an amp.

Highlights

  • Normally closed circuit activates when door is shut
  • 15 to 25mm sensing range covers standard door gaps
  • 5 amp switching capacity suits alarm panel inputs
  • Recessed ABS housing installs flush in metal or wood
  • Two sensors included for protecting multiple entry points

Specifications

BrandUnique Bargains
TypeSurveillance - Home Safety & Security

Questions about this item

How can I verify the RC-33 sensor is working correctly after installation?

With the magnet within the 15-25mm actuation distance the circuit stays closed; separate the magnet and the circuit opens, which you can confirm with a multimeter or the alarm panel status.

What comes in the package and what extra items are needed for a complete setup?

The box contains two RC-33 magnetic door switches with 25cm cables; mounting screws, control panel wiring and a power source are not included.

Which version of the RC-33 should I choose for a normally-closed alarm loop?

This model is the NC (Normally Closed) version, designed so the circuit conducts when the magnet is close and breaks when the door opens.

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