LiftMaster 821LMC-SENSOR Smart Garage Control Door Sensor
Special Order: typically 2–6 weeks
Ships directly from the manufacturer. This is an estimated lead time, not a guaranteed delivery date.
Availability can change and lead times may be longer. If your project has a deadline, check with us before ordering.
A member of our team will check with the manufacturer and personally reply by email.
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Key Features
- Add remote monitoring and control of a second garage door through the myQ app for improved security and convenience
- Compact, low-profile design (2.65" H x 2.62" W x 0.87" D) fits discreetly on most garage doors and sensors
- Simple installation and programming saves technician time and reduces downtime for fleets and facilities
- Integrates with LiftMaster Smart Garage Control, myQ Smart Garage Hub and myQ Garage for centralized access and alerts
- 1-year limited warranty provides reliable protection and support for commercial and residential deployments
Quick Specifications
- Product Model
- 821LMC-SENSOR
- Brand Name
- Liftmaster
- Product Name
- Door Sensor
- Product Type
- Sensor
Explore the details
Product information
821LMC-SENSOR
Overview
Keep your facility or home garage secure and connected with the LiftMaster 821LMC-SENSOR Smart Garage Control Door Sensor. Designed to add monitoring and control of a second garage door, this LiftMaster sensor gives you real-time status and remote operation through the myQ app—so you can verify door position, receive alerts and manage access from anywhere. Its compact footprint (2.65" H x 2.62" W x 0.87" D) installs easily on most doors and integrates seamlessly with Smart Garage Control, myQ Smart Garage Hub and myQ Garage systems. The sensor provides a straightforward solution for security-conscious property managers, fleet operators and installers who need reliable surveillance and monitoring without complex wiring. Backed by a 1-year limited warranty, the 821LMC-SENSOR offers dependable performance and rapid setup so you can scale garage monitoring across multiple sites. Ideal for enhancing security, access control and operational oversight—add the LiftMaster 821LMC-SENSOR to your myQ ecosystem today to expand garage monitoring and protection.
Features
- Add remote monitoring and control of a second garage door through the myQ app for improved security and convenience
- Compact, low-profile design (2.65" H x 2.62" W x 0.87" D) fits discreetly on most garage doors and sensors
- Simple installation and programming saves technician time and reduces downtime for fleets and facilities
- Integrates with LiftMaster Smart Garage Control, myQ Smart Garage Hub and myQ Garage for centralized access and alerts
- 1-year limited warranty provides reliable protection and support for commercial and residential deployments
| General Information | |
|---|---|
| Brand Name | Liftmaster |
| Manufacturer | Liftmaster |
| Product Name | Door Sensor |
| Product Type | Sensor |
| Product Model | 821LMC-SENSOR |
| Manufacturer Part Number | 821LMC-SENSOR |
| Physical Characteristics | |
| Depth | 0.87" |
| Width | 2.62" |
| Height | 2.65" |
| Weight | 775.12lb |
| Product Replacements & Other Alternatives | |
| Model Number Replaces | 821LMB-2SENSOR |
| Warranty | |
| Limited Warranty | 1-Year |
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Plan your purchase
Is this right for your project?
Confirm the model, required accessories and delivery needs before ordering.
- SKU:
- 821LMC-SENSOR
- Manufacturer part:
- 821LMC-SENSOR
How do I confirm compatibility?
Check the specifications and manufacturer documents for your existing system. Send us your model numbers and project requirements if you need help selecting equipment or accessories.
Ask a product specialistWhen will this item ship?
Availability is shown above. Special-order items and project quantities may need additional lead time. Contact us to confirm a delivery date before scheduling installation.
Shipping, freight and delivery detailsWhat should I know about returns?
Returns require an approved RMA. Consult the linked return policy for deadlines and eligibility. For standard non-defective returns, eligible factory-sealed items carry a 15% restocking fee and customer-paid return shipping; open-box and used items are refused. Defective and DOA claims follow the policy's separate terms. Special orders and other exclusions are final sale.
Read return eligibility and exclusionsLiftMaster 821LMC-SENSOR Smart Garage Control Door Sensor
821LMC-SENSOR