Springs

Liftmaster MyQ Additional Door Sensor for Smart Garage Control HUB

SKU: LM-821LMC-SENSOR

Description

The LiftMaster 821LMC-SENSOR is an additional door sensor designed for use with Smart Garage Control, myQ Smart Garage Hub, and myQ Garage. This sensor allows users to add control of a second garage door opener to their existing Smart Garage setup. It offers the capability to secure, control, and monitor a second garage door through the myQ app, enhancing the overall security and convenience of the garage system.

Key Features and Specifications:

  • Compatibility: Compatible with Smart Garage Control, Smart Garage Hub, and myQ Garage. Requires the purchase of the Smart Garage Control or Smart Garage Hub (sold separately).
  • Ease of Use: Designed for easy installation and programming.
  • App Integration: Enables users to check the status and control two garage doors using the myQ app.
  • Dimensions: Measures W 2-5/8" x H 2-5/8" x D 7/8".
  • Warranty: 1-year accessory warranty.
Compatibility
The LiftMaster 821LMC-SENSOR is compatible with Smart Garage Control, Smart Garage Hub, and myQ Garage. However, it's important to note that it requires the purchase of the Smart Garage Control (Models: 821LMC and MYQ-G0401), or the Smart Garage Hub 1st generation (Models: 821LM & MYQ-G0201) and 2nd generation (Models: 821LMB & MYQ-G0301), each sold separately. Each Hub can control up to two garage door openers
    Reviews
    FAQs
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    Here's the truth: broken or aging springs are the number one cause of garage door opener failure. It's not motor burnout, it's not electrical issues – it's springs.

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    Here's the honest truth: most garage door service technicians aren't fans of Torque Master systems. Many will even refuse to work on them and try to convert you to a traditional torsion spring setup instead.

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    September 23, 2025 4 min read

    Wondering how many turns to wind a garage door spring? We explain why there’s no universal answer, where people go wrong, and how to get the exact number of winds for your setup.

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    Description

    The LiftMaster 821LMC-SENSOR is an additional door sensor designed for use with Smart Garage Control, myQ Smart Garage Hub, and myQ Garage. This sensor allows users to add control of a second garage door opener to their existing Smart Garage setup. It offers the capability to secure, control, and monitor a second garage door through the myQ app, enhancing the overall security and convenience of the garage system.

    Key Features and Specifications:

    • Compatibility: Compatible with Smart Garage Control, Smart Garage Hub, and myQ Garage. Requires the purchase of the Smart Garage Control or Smart Garage Hub (sold separately).
    • Ease of Use: Designed for easy installation and programming.
    • App Integration: Enables users to check the status and control two garage doors using the myQ app.
    • Dimensions: Measures W 2-5/8" x H 2-5/8" x D 7/8".
    • Warranty: 1-year accessory warranty.
    Compatibility
    The LiftMaster 821LMC-SENSOR is compatible with Smart Garage Control, Smart Garage Hub, and myQ Garage. However, it's important to note that it requires the purchase of the Smart Garage Control (Models: 821LMC and MYQ-G0401), or the Smart Garage Hub 1st generation (Models: 821LM & MYQ-G0201) and 2nd generation (Models: 821LMB & MYQ-G0301), each sold separately. Each Hub can control up to two garage door openers
      Reviews
      FAQs