We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
White plastic magnetic door reed sensor switch, rectangular, two sets with mounting screws

Unique-Bargains

Unique-Bargains Magnetic Door Reed Sensor Switch White 2 Sets

SKU CH-Z26G-D73QT

Magnetic contact switch detects door or window opening with a normally-open reed circuit and includes two white ABS units plus mounting screws

  • Product typeSurveillance - Home Safety & Security
  • Magnetic contact triggers alarm when door opens
  • Normally-open circuit closes only with magnet nearby
  • White ABS housing blends with door frames
  • Surface-mount design installs with included screws
  • Two sensor sets cover multiple entry points

Two-piece magnetic reed switch kit

This kit contains two surface-mount magnetic reed sensors in white ABS housings, each measuring 6.4 x 2.5 x 2cm. They are designed for wired alarm systems monitoring doors and windows in homes or factories. The switches operate on a normally open circuit that closes when the magnet is near.

Wired-installation projects only

These contacts suit installers running their own low-voltage wiring for a hardwired security panel. They do not suit buyers who want a wireless sensor, a battery-powered device, or a smart-home protocol such as Zigbee or Z-Wave. They also do not suit projects needing a normally closed circuit.

DC 100 V working voltage

The reed switches are rated for a working voltage of DC 100 V. This single electrical rating determines whether the contacts are compatible with your specific alarm panel or control circuit. Verify your system voltage before purchase.

How it compares

Measured against everything we stock in Alarm Kits & Motion Sensors, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 97% of the 180 comparable items (median $30.99).

Specifications

Product
Brand nameUnique Bargains
Product typeSurveillance - Home Safety & Security

Questions about this item

Will the 6.4 cm sensor fit alongside the existing 2.5 cm thick door frame trim I plan to keep?

The sensor body measures 6.4 cm long, 2.5 cm wide and 0.79 cm high, so it sits flush on standard trim without overhang.

How can I verify the NO reed switch is operating correctly once wired to my 100 V DC alarm loop?

With the magnet in place the circuit closes; removing the magnet opens the circuit — test with a multimeter on continuity to confirm each state.

The pack lists installation screws but no wire; what gauge cable should I purchase separately for the DC 100 V connection?

Two white ABS sensors and mounting screws are included; you must supply your own low-voltage alarm wire rated for at least 100 V DC.

More in Alarm Kits & Motion Sensors

Similar items