ZZ MartsDH-31 NC
DH-31 Door Contact – NC Magnetic Door Sensor
- Normally Closed (NC) Magnetic Contact
- Designed for Alarm & Security Systems
- Durable ABS Plastic Housing
- Reliable Magnetic Detection
- Surface Mount Easy Installation
- Compatible with Most Alarm Panels
Price includes tax. Delivery calculated at checkout.
Why our price is lower
We import directly and supply the trade from two shops in Karachi and Lahore. There is no middleman between the container and you. Same product, fewer hands.
In stock, ready to ship
Limited stock1 year service warranty Void if burnt or physically damaged Claim it at either shop, or send it back — we handle the manufacturer for you. Invoice included with every order.
Will this fit my setup?
- Check the voltage your existing wiring or adaptor supplies.
- Measure the space, door thickness or bracket spacing before ordering.
- Confirm it works with the recorder, panel or app you already use.
- Still not sure? Send a photo of the old part, the door or the existing setup. We will tell you what fits - usually within minutes during shop hours.
- Free delivery on orders over Rs 5,000
- 2-3 working days to Karachi, Lahore and Islamabad · 3-5 elsewhere
- Cash on delivery available nationwide
- Order before 4pm for same-day delivery in Karachi and Lahore · prepaid orders only
- Save 4% when you pay by card or bank deposit · use code PREPAID4
- Free collection from our Karachi or Lahore shop
- Genuine product
- 7-day returns
- Secure checkout
- Trading since 2005
Not sure this is the right one? Ask us on WhatsApp - we will tell you straight.
DH-31 Door Contact – NC Magnetic Door Sensor
Rs.350.00Product details
The DH-31 Door Contact (NC) is a magnetic sensor used in security and alarm systems to detect whether a door or window is open or closed.
It consists of two parts: a reed switch sensor and a magnet. When the door is closed, the magnet keeps the circuit closed. When the door opens, the magnetic field is interrupted and the circuit opens, triggering the alarm system.
The DH-31 contact is widely used in home security systems, burglar alarms, access control systems, and commercial security installations.
Its compact design and strong ABS casing make it suitable for installation on wooden, metal, or aluminum doors and windows.
This magnetic door sensor is available at ZZ Marts in Karachi and Lahore, with delivery across Pakistan.
Specifications
| Model / SKU | DH-31 NC |
|---|
Specifications are provided by the manufacturer and may change without notice. Please confirm before installation.
Frequently asked questions
What is the DH-31 NC door contact?
It is a surface-mount magnetic door contact wired Normally Closed (NC) — it opens the circuit and triggers the alarm when the door opens.
Where is it used?
Doors and windows on alarm systems. Browse more Door Sensors & Relay Modules.
Do you deliver nationwide and is there a warranty?
Yes — nationwide delivery, cash on delivery, 1-year warranty.
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