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weideer 2pcs MC-31B Magnetic Reed Switch Wired Surface Mount Normally Open Closed NC NO Door Contact Sensor Alarm Magnetic Door Switch White
✅ In stock
F
Grade
Analysis Confidence
73%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 20, 2026 2:44 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The price is modestly below what this product ordinarily sells for.
- 🏷️The retail sticker price has been slashed by 60% — a steep markdown from the official listing.
- 📉No lower price has surfaced in the past twelve months, making this one of the standout deals in recent memory.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
2.84/28
Recent Value
1.2/22
Market Standing
3.57/20
Deal Strength
16/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
HenGu
📦 Fulfillment
Fulfilled by Amazon
🚚 Shipping
Free Shipping
Product Details
✓Product name:Surface Mount Magnetic Reed Switch.Type:MC-31B.Color:White.Material: fireproof ABS material.Product size: 55X12.5X11.5mm / 2.17" x 0.45" x 0.45"(L*W*H).Maximum Switch Voltage: 100V DC.Maximum switch current: 0.5A.Maximum switch power: 10W.
✓Contact Type: NC/NO/COM: NC means Normally Closed.When the magnet together, the circuit is conductive; when the magnet separate, the circuit is not conductive.NO means normally open: when the magnets are separated, the circuit is turned on ; when the magnets are together, the circuit is not turned on. Actuation Distance: 10-20mm.
✓Reed switch can be used in home security and burglar alarm system. It is an ideal choice for wooden doors and windows in homes and factories.
✓Magnetic Reed Switch can not connect directly to power, It needs to work with the alarm system. It provides a switching signal.
✓Package Content:2 sets Magnetic Reed Switch+8pcs Screws
⚙️ Specifications
Operation Mode
automatic
Current Rating
0.5 A
Operating Voltage
100 volts_of_direct_current
Contact Type
Normally Open, Normally Closed
Connector Type
Screws
Brand
weideer
Switch Type
Magnetic
Terminal
Screw
Material
Acrylonitrile Butadiene Styrene
Circuit Type
1-way
Mounting Type
Surface Mount
