Skip to content Flex IO Cellular Door/Window Sensor with Input Cat-M LTE AT&T

Original price $209.00 - Original price $209.00
Original price
$209.00 - $209.00
Current price $209.00

The Flex IO™ sensor offers unprecedented levels of flexibility for keeping an eye on assets and property anywhere there is LTE connectivity. The Flex IO sensor gives consumers the ability to keep an eye on what matters most, whether it is utilized with a backyard gate or a remote storage unit.

It may be used as an open/close sensor to keep an eye on doors, gates, and other entryways when paired with the supplied magnet.

It also has input and output capabilities so that a normally open (preferred) input may be used as a trigger.   This allows it to be added to any of our driveway alarms that have a relay output or other similar products. products require an account with the "Cellular Sensor" service feature added.  Your partner will need to work with you to add devices to your account.

Alarms247 offers DIY monitoring packages to support these devices.


 Key Features:
  • Detect open/close using a magnetic reed switch
  • Detect state change for the third-party device using Loop Input (normally open or normally closed)
  • Control external third-party and device using Relay Output (requires DC power to support always-on cellular connection).  NOT to be used to directly control high voltage.

 In the box
  • Optional EOL (end of the line) resistor to detect cut wires. EOL resistor can be 300 kΩ or higher. Normally Open configuration is preferred for low power usage.
  • Optional mount tamper and battery door tamper alerts
  • Multiple mounting options, including screws or zip ties.
  • AT&T activated (the US and Canada)




Ingress Protection




Battery life will be optimal between temperatures of 32°F to 140°F (0°C to 60°C), though the device can operate from -40°F to 140°F (-40°C to 60°C).

Reed Switches

3 unique reed switch locations to choose from that can be activated with the included magnet. 

Loop Input

  • The Flex IO™ sensor can be powered by a battery or external power.
  • Dry Contact, Normally Open (NO), or Normally Closed (NC).
  • The optional EOL resistor can be 300 kΩ or higher.

Relay Output


  • If used, the Flex IO™ sensor must be externally powered (not compatible with battery power).
  • Up to 24 V (AC or DC), 40 mA max current.
  • Can be used only for control lines/dry contact.

 Caution: Can never be connected directly to control-   electrical loads. This will damage the device.



  • Main unit: 6.8 x 2.2 x 1.3" (17.3 x 5.6 x 3.3 cm).
  • Magnet: 3.1 x 0.68 x 0.87" (7.9 x 1.7 x 2.2 cm).



  • Works with DC-wired power or battery power (battery backup recommended for wired installations).
  • 6 to 15 VDC supply. Minimum 1 A.

Battery Power

  • Four 1.5 V AA lithium batteries (iron disulfide). 
  • 2+ years of battery life, depending on battery chemistry and operating temperature.

Shipping & Delivery

We ship from Canada with typical delivery times of 2-5 days to major centers. Most orders over $100 before tax ship FREE.