The first line of defense against intruders, both the Sabre and the iSmartAlarm sensors are wireless and easy to install for the DIYer.
Sabre vs. iSmartAlarm Window/Door Sensors
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Bottom Line: iSmartAlarm Sensors provide more coverage
The iSmartAlarm sensors work well if you want complete home coverage with multiple zones and the ability to control your system remotely through a smart phone app.
Sabre vs. iSmartAlarm: Pricing and features
| Sabre Sensor | iSmartAlarm Sensor | |
| Size | 2 x 3.5 x 0.6″ | 2 x 2 x 0.5″ |
| Batteries | 2 AAA | CR2 |
| Works with Other Security Systems |  No | No |
| Low Battery Indicator Light |  Yes | Yes |
| Left or Right Side Mounting | Yes | No |
| Smart Device/IFTTT Compatible | No | Yes |
| Professional Monitoring | No | No |
| Chime Option | Yes | Yes |
| System Device Capacity | Up to 8 devices | Up to 70 devices |
| Siren Volume | 120 decibels | 110 decibels |
| Requires Monthly Contract | No | No |
| Price | View on Amazon | View on Amazon |
Window/Door Sensors 101
Place door and window sensors in as many locations as possible, starting with the back of your home, where intruders are less likely to be seen. Make sure the surface is clean and dry before attaching a sensor, and install the sensors near the top of doors where they’ll be out of the way. You can check out the Best Window/Door Sensors for even more helpful info!
Compare Sabre vs. iSmartAlarm Sensors
Sabre Window/Door Sensor review
The Sabre Window/Door Sensor is an add-on to the Sabre WP-100 security system. It mounts using double-sided tape or screws and uses a transmitter and magnet to send a signal to the main system in case of a security breach. It can be mounted on any door or window, including interior openings.
Price
The Sabre Window/Door sensors sell for just under $20 each.
Features
Sabre sensors have arrows on both the transmitter and the magnet to ensure the placement is correct. The sensor also has a low-battery indicator light.
Equipment
The Sabre Window/Door Sensor package includes the transmitter, magnet, and both double-stick tape and screws for mounting. Batteries are not included.
Home automation
Sabre’s products are geared toward people who want a straightforward, software-free option for their home security. The alarm systems do not work with home automation, but the self-contained system does make them simpler than automated systems.
Pros
Transmitter on both sides
Affordable
Can be placed up to 500 ft from control panel 
Cons
Only 8 sensors per system
No remote monitoring
Zones must be adjusted by manipulating pins inside unit
Works only with Sabre WP-100 security system Bottom line
This door/window sensor is a simple way to get more coverage for an existing Sabre system in a smaller home or apartment, and it’s great for those who want to scare off intruders, as the Sabre base unit boasts a 120-dB siren.
iSmartAlarm Contact Sensors
The iSmartAlarm Contact Sensors are an add-on to the iSmartAlarm CubeOne security system and can be attached with double-sided tape or screws to any window or door. This system can alert you to a breach by phone call, text, or email.
Price
The iSmartAlarm Contact Sensors are available only in two-packs that sell for just over $50.
Features
The best feature of the iSmartAlarm sensors is that you can receive alerts and arm and disarm your system through your smart phone. You can also customize alerts to let you know when specific sensors are triggered, in case there's a certain area of your home you're particularly concerned about.
Pros
Small and discreet
Long battery life
System can handle up to 70 sensors Cons
Sensors only mount on one side of opening
Quiet alarm
Works only with iSmart CubeOne security system
Works only with Sabre WP-100 security system Our verdict
Both sensors and systems are simple enough for do-it-yourself home security, but the brand you choose will depend on how many sensors you need and if you want remote access to your system.
Sabre: The Sabre sensors work well for an inexpensive, basic home security system that will alert you loudly when breached. This system is the best choice for people who want security without the hassle of the smart phone component.
iSmartAlarm: The iSmartAlarm sensors are connected to a pricier, fully integrated system that can alert you of a breach even when you're not at home. It’s an excellent choice if you have a larger home or want home automation capabilities and smart phone alerts.
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