ZZ MartsDH-31 NO
DH-31 Door Contact – NO Magnetic Door Sensor
- Normally Open (NO) 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 – NO Magnetic Door Sensor
Rs.499.00Product details
The DH-31 Door Contact (NO) is a magnetic sensor used in security and alarm systems to monitor the opening and closing of doors or windows.
This model works on Normally Open (NO) configuration, meaning the circuit remains open when the magnet is near the sensor and closes when the magnet moves away.
The device consists of two parts: a magnetic reed switch and a magnet. When the door opens and the magnet separates from the sensor, the circuit closes and can trigger an alarm or signal to the control panel.
The DH-31 sensor is commonly used in home security systems, burglar alarms, access control systems, and commercial security installations.
Its compact and durable ABS plastic design allows easy installation on wooden, metal, and aluminum doors or windows.
You can order this magnetic door sensor from ZZ Marts, with branches in Karachi and Lahore and nationwide delivery.
Specifications
| Model / SKU | DH-31 NO |
|---|
Specifications are provided by the manufacturer and may change without notice. Please confirm before installation.
Frequently asked questions
What is the DH-31 NO door contact?
It is a magnetic door contact wired Normally Open (NO), closing the circuit when the door opens — choose NO or NC to match your panel.
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.
Customer reviews
Reviews from people who bought this product from ZZ Marts.
No reviews yet for this product. Be the first.