Offene Glastür mit silbernem Griff; draußen unscharfes Auto in der Einfahrt

Door lock sensor

See in the app if you've really locked the door. You can do that with the Homematic IP door lock sensor.

Keeps track of your door lock

Did I really lock the front door? The Homematic IP door lock sensor frees you once and for all from this nagging uncertainty, because the sensor detects at any time whether the door lock is locked or unlocked. Monitor your door in the Homematic IP app and check every opening and closing in the detailed event log.

Always know whether the door is locked

When you're out and about, check via the Homematic IP app whether your front door is locked.

And every time the door is locked or unlocked, it's recorded in the Homematic IP app’s event log. With the "secured locking" function, you can also see whether the door is open or closed in conjunction with a door and window contact.

Turns the key into a smart knob

Your key is transformed into a practical turning knob in no time with the door lock sensor.

The key simply turns with the door lock sensor. This means it’s still very easy to lock and unlock the door by hand.

Visual matching to your door fittings

Two caps in white and silver are included.

Provides more security

Just combine the sensor into your security solution.

When alarm mode is activated and when the door is unlocked

either Alarm mode is automatically deactivated or
an alarm is triggered.

Easy retrofitting

Simply insert your key into the door lock sensor and both together on the inside of the door into the lock - without drilling or screwing and completely invisible from the outside.

Thanks to its universal design, the device fits on all common key types for standard lock cylinders with emergency function. To lock or unlock the door from the inside, simply turn the door lock sensor in the corresponding direction like a knob.

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Installationspartner finden

Does my key also fit in the door lock sensor?

We've developed a template so that you can be sure that your key also fits into the smart door lock sensor. Simply print it out in its original size and place your key in the space provided.

Key template download

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Door lock drive

Make your front door smart quickly and easily with the door lock drive. Then you can lock, unlock and open them automatically as you wish or depending on the time of day.

Alarm siren

If someone tries to enter your home without permission, our smart alarm siren will signal this loudly and immediately.

Switch actuator for brand switches – with signal lamp

Conveniently switch all devices in the home and let the signal lamp display different scenarios with certain colour combinations. To do this, simply install the switch actuator for brand switches.

Homematic IP: Smart living. Simply exciting.

Homematic IP means modern, flexible and secure technology from the European market leader*. Let the advantages of our system win you over, and start living smarter straight away.

Person auf Sofa hält Smartphone mit geöffneter Homematic IP App, gemütliches Wohnzimmer.

The Homematic IP app

Configure all settings for your smart home in the Homematic IP app, which you can use to control, regulate and monitor your devices at any time. No personal data is collected except for the IP address.

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Kommen Sie herein!

Jedes Smart Home ist so einzigartig wie die Menschen darin. Statten Sie unseren Referenzprojekten einen digitalen Besuch ab, lassen Sie sich inspirieren und entdecken Sie die vielfältigen Möglichkeiten von Homematic IP.

Use Cases (field_use_cases)

Smartly renovated multi-family house

During the renovation work, the dream of a smart multi-family house equipped with more than 100 Homematic IP products became a reality.

A different kind of office

From the outside, the Gerhardt & Wiegand insurance office in Hattingen (Germany) may appear quite ordinary, but visitors quickly realise upon entering that great design and intelligent solutions are highly valued here.

Always here for you and your queries.

Whether you have a question about a product, something isn’t working as you wanted, you’re looking for a specialist partner, or you simply want to give us feedback: we are always here to help.

FAQs

This is where you’ll find the most important questions and our answers about our smart home solutions.

All FAQs

Service

Have you purchased a Homematic IP product and now have questions about how it works? Our technical support team will be happy to help you.

Service

Specialist tradespeople

Are you looking for a good specialist tradesperson near you? Simply use the convenient search function here on our website.

Find a specialist tradesperson

Dealers

You can get Homematic IP products and good advice all over Germany. Find the right dealer near you here.

Find a dealer

Innovations, ideas, impulses: your news

Get first-hand news about the latest innovative smart home solutions.

View all news

Alle News ansehen

Use Cases (field_use_cases)

Homematic‑IP Universal Dimmereinsatz in moderner Wohnzimmerszene, rechts Produktvarianten

A real problem-solver for smart retrofitting: the Homematic IP Universal Dimmer Insert

The new universal dimmer for the Homematic IP smart home system can also be wired without a neutral conductor, making it ideal for retrofitting existing buildings.

01. September 2026

Invisible and intelligent: Compact flush-mounted switch actuators for smart retrofitting

The new Homematic IP switch actuators fit even in the smallest flush-mounted box. This turns any building into a smart home.

13. August 2026

New Energy Management features for the Homematic IP Home Control Unit

The EEBUS plugin for the Homematic IP Home Control Unit now supports the LPC and LPP functions for automatically limiting power consumption and power feed-in.

11. August 2026

Systematic security: fully integrated Homematic IP camera family now available

The new Homematic IP security cameras are part of a comprehensive smart home ecosystem. With just one app, users have access to all features and can keep an eye on their smart home at all times. Rigorous data protection and secure encryption ensure complete peace of mind.

31. July 2026

Order information

Product Name (Short)

HmIP-DLS

Item Number

155475A0

EAN Code

4047976554751

Technical data

Supply voltage

1x 3 V CR2032

Current consumption

30 mA max.

Typical battery life

2 years (typical)

Degree of protection

IP20

Dimensions (W x H x D)

26 x 56 x 38 mm

Ambient temperature

5 to 35 °C

Weight

38 g (incl. batteries)

Radio frequency

868.0-868.6 MHz/869.4-869.65 MHz

Typ. open area RF range

210 m

Connection

Wireless

Color

white

Unterstützungszeitraum für Security Updates: > 5 Jahre**

* Über den „Jetzt kaufen“-Button gelangen Sie direkt zur Produktdetailseite des jeweiligen Artikels im Onlineshop der ELV Elektronik AG. Bitte beachten Sie, dass unsere Produkte nicht ausschließlich dort angeboten werden. Homematic IP Produkte sind auch in weiteren Onlineshops, im stationären Handel und über zertifizierte Fachpartner erhältlich. Eine vollständige Übersicht finden Sie in unserer Händlersuche.

** Die eQ-3 AG garantiert für jedes Produkt einen durchgehenden Support bis fünf Jahre nach der offiziellen Abkündigung.