wireless AA open/closed sensor

Wireless Open-Closed Sensors

Proactively prevent spoilage, damage, or theft.

These popular ALTA® Wireless Open-Closed Sensors help you remotely monitor door, window, cabinet, or lid status. Get an alert via text, email, or call if something’s been left ajar or accessed when it shouldn’t.

An Elegantly Simple Security Solution

The ALTA Open-Closed Sensor uses an external switch and trigger magnet to detect status—when the magnets meet, a door or window is closed. The sensor can be configured via iMonnit only to send notifications during specific dayparts, such as after-hours. Data also sheds light on access patterns—a boon for the foodservice, healthcare, and hospitality sectors.

Ready for restaurant walk-ins, vaccine fridges or ultralow temperature (ULT) freezers, retail, and more, Monnit’s Open-Closed Sensor types include compact, Wi-Fi-enabled, Power over Ethernet (PoE), and long-range wireless low-profile enterprise or industrial devices. We also offer a variety of options to tailor these sensors to your needs.

Add an ounce of prevention to your business or facility with one of the Monnit Open-Closed Sensors below.

Wireless Open-Closed Sensors - AA Battery Powered
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Enterprise Wireless

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Wireless Open-Closed Sensor - Coin Cell Powered
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Commercial Wireless

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Industrial Wireless Open-Closed Sensors
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Industrial Wireless

  • Industrial Battery Powered
  • Up to 7 Years Battery Life
  • Specifications

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PoE Sensors
PoE•X Open-Closed Sensor
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PoE•X - Power over Ethernet

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WiFi Sensors
Wi-Fi Open-Closed Sensors
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MoWi - Wi-Fi

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Which Sensor is Right For Me?

  • Enterprise AA-battery powered: Our most popular type is ideal for typical commercial & enterprise environments, such as server rooms. A 1,200+ ft. range readily covers most facilities.
  • CC-battery powered: Compact sensor is great for space-restricted areas such as control cabinets or cold storage.
  • Industrial: Sensor's weatherproof, NEMA-rated enclosure withstands demanding indoor/outdoor use, e.g., warehouses & production facilities.
  • PoE•X: Power over Ethernet sensors integrate with a building's PoE network; it can also be used with a standard Ethernet infrastructure & powered via an optional AC adapter.
  • MoWi: This discreet sensor uses your own Wi-Fi for networking and data transmission—popular for smaller businesses and facilities.
Still not sure which sensor type to choose? Visit our Sensor Comparison page.



2,000+ ft. Range through 18+ Walls
Up to 12 Years of Battery Life
Automated Data Logging


Unbeatable Range Eases Networking
Dependable, Worry-free Operation
Streamlined Compliance & Data Analysis

How Monnit Sensors Work

how Monnit remote monitoring works

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