Qolsys IQ Recessed Door-S

Recessed Door/Window Sensor for IQ Panel 2

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The Qolsys IQ DW Recessed-S sensor is the perfect companion for the award-winning IQ Panel 2 to monitor unauthorized entry into your home...
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The Qolsys IQ DW Recessed-S sensor is the perfect companion for the award-winning IQ Panel 2 to monitor unauthorized entry into your home. The easy-to-install smart device uses encrypted S-Line sensor technology to communicate with the command center securely to alert you by text if your door is opened.

Once installed, the device is virtually impossible to detect. You can rest assured that you will know if your security is breached. You can customize it for each sensor with a unique identifier so that you know exactly where the problem lies. You can also set automation rules for each sensor that can access other devices in your home.

For example, you can adjust the thermostat if a door is opened so that you can save energy and improve the efficiency of your home heating/cooling system. The Qolsys IQ Recessed-S sensor provides the security you need on your terms.

Why Do I Need a Door Sensor?

The IQ Panel is the command center of your security system that uses input from other sensors to customize it to your home’s needs. The Qolsys IQ Recessed-S sensor is a smart addition if you have multiple entry points into your house to increase your system’s effectiveness. Its usefulness goes beyond a secure home. It can also save on your electricity bill.

A door sensor allows you to monitor activity at each of the entry points of your home. You’ll know exactly where and when a door is opened. With the automation rules, you can customize the response by your IQ Panel. You can set unique alarms or voice prompts with each sensor so that you know where the breach has occurred.

You can also program a specific response to an open door. Save money on your electricity bill by adjusting the thermostat so that you don’t waste energy. Turn on a light to help you enter your home safely or to alert an intruder that you have a security system in place. Either way, you can make it work best for you and your home.

The communication between the sensor and the IQ panel is secure with the encrypted S-Line sensor technology. You’ll know if anyone tampers with the alarm and even if the battery is low to make sure your home stays secure. The sensor uses an earth magnet to maintain a strong connection that makes it difficult for intruders to breach.

Specifications of the Qolsys IQ Recessed-S Sensor

The sensor can communicate within a wireless signal range of 600 feet (200 meters) of unobstructed space. It operates in almost any weather conditions so that you can use it for both interior and exterior doors. The operating temperature is between 14 to 122 degrees Fahrenheit (-10 to 50 degrees Celsius). It can handle temperatures up to -40 degrees Fahrenheit.

Maintenance on the Qolsys IQ Recessed-S sensor is simple. It uses one 3V CR2 battery that you’ll need to replace every five years. You should also periodically check the sensor and the magnet to ensure that the alignment is still correct. Otherwise, your sensor requires no other care on your part. Set it and forget it. Your home and family are secure.


You’ll first need to program your door sensor with the appropriate name and settings before you put it into place. You’ll customize each one through the IQ Panel after putting the sensor in “Learn” mode. You’ll need to tamper the device by opening and closing the connection. Then, you’re ready to program it to fit your needs with automation rules for each device.

That is where the real value of the sensor lies. Not only will it alert you to possible threats, but you can also customize your security system’s response to a particular entry. For example, you can turn on a light to help you safely enter your home. You could also adjust your thermostat to save energy. But you can also change your sensor’s customization options on the fly.

You can go back and change your settings to match the season or circumstances. For example, you can turn your thermostat down when a door is opened during the winter months. Likewise, you can set it to go up during the summer to control your central air conditioning. These options give you the ability to save on your energy bills no matter what time of the year.

Then, you can put the door sensor in place to begin its task of securing your home. You can install the magnet on the top of your door or on the side. Depending on your door, you may put it in the frame instead. The sensor requires an opening that is 0.75 inches in diameter and 2.25 inches long that you can make using an ¾ inch drill bit. The sensor will fit snugly into the hole.

You can install the corresponding magnet into the frame using the same ¾ inch drill bit in a hole about 0.63 inches deep. The two pieces will fit flush with the wood to make detection nearly impossible. But you’ll know it’s there protecting you and your family. The tight fit ensures that it will present a formidable barrier to any intruder so that your family remains safe.

Proper installation is essential to ensure that the sensor will work as intended. Verify that the sensors are working correctly with a test run. Check that the components line up. Make sure that the responses are also functioning as you’ve set them. The extra precaution you take with testing will ensure your sensor is providing the optimal protection for your home’s security.

The Qolsys IQ Recessed-S sensor takes your home security to the next level with the ability to customize your system to fit your specific needs. With customization options, you can get quick access to important alerts about open doors with the ability to program an appropriate response whenever and however you need it to respond.

Note: Qolsys sensors operate at 319.5 MHz. They will not work with the 345 MHz and the 433 MHz versions of the Qolsys IQ Panel 2 Plus. They are designed for the 319.5 MHz IQ Panel 2 Plus and other 319.5 MHz systems.

Brand: Qolsys

Qolsys IQ Recessed Door-S Compatible Products

GRI M-180
Steel Door Recessed Magnet 3/4" Diameter
List Price:
Our Price: $2.99
Good Sensor, But There Are Other Options
Submitted on 08/07/2019 Alarm Grid

We generally like the Qolsys IQ Recessed Door-S, but there are sometimes better options available. The first thing to note is that this is a recessed contact sensor. That means the sensor will be hidden inside the door or window frame. This is good for users who want to have their sensor hidden from outside view. However, a recessed sensor will require that a hole is drilled into the door or window frame. You will also need to drill an accompanying hole in the door or window itself for the magnet. Not every user is going to want to drill holes, so some users are best off buying a surface-mounted sensor instead. Our technicians find that installing the Qolsys IQ Recessed Door-S is pretty easy, but a surface-mount sensor will be even easier to install.

If you do need a recessed sensor, then the Qolsys IQ Recessed Door-S is a pretty good choice if you have a 319.5 MHz system. Some 319.5 MHz systems include the original IQ Panel 2 System, the Interlogix Simon Alarm Panels, and the 319.5 MHz version of the Qolsys IQ Panel 2 Plus. The biggest selling point of this sensor is its S-Line Rolling Code Encryption. This feature prevents the sensor from being hacked or taken over by potential intruders. However, the sensor will only utilize the S-Line Encryption with the original IQ Panel 2 and the 319.5 MHz version of the IQ Panel 2 Plus. On all other systems, including the Interlogix Simon Panels, the sensor will behave as a non-encrypted 319.5 MHz sensor.

If you have a 319.5 MHz system other than the IQ2 or IQ2+, then you are actually better off buying the Interlogix TX-E221 instead. The TX-E221 is basically the same recessed sensor, but without the S-Line Rolling Code Encryption. Since only the original IQ2 and 319.5 MHz IQ2+ can use the S-Line Encryption, there is no reason to buy the IQ Recessed Door-S if your panel cannot support it. Meanwhile, if encryption is important to you, then there might be a recessed sensor that offers even better protection. The DSC PG9307 PowerG Recessed Contact uses 128-bit AES encryption, which is considerably more secure than the rolling code encryption used by the S-Line Sensors. The DSC PG9307 will work with any PowerG-compatible system, including ALL versions of the IQ Panel 2 Plus. With that in mind, the IQ Recessed Door-S is only the most secure recessed sensor for the original IQ Panel 2, a system which has since been discontinued.

Bottom line, the Qolsys IQ Recessed Door-S is a good sensor, but it isn't always the best option. If you don't want to drill holes in your door or window frame, go with a surface mount contact like the VERSA-GE. If you don't care about encryption, save a few dollars and go with the Interlogix TX-E221. If you have a PowerG-compatible system and you want a more secure sensor, go with the DSC PG9307. The IQ Recessed Door-S is really only the best sensor if you have an original IQ Panel 2. The sensor is also a good option if you have a 319.5 MHz version of the IQ Panel 2 Plus, and you want some level of encryption, but you don't need the ultra-secure 128-bit AES encryption of a PowerG Sensor.

* Based on a 10% APR with 12 months financing. APR's will vary between 10% - 30% based on credit score and various factors.