Miller Sensing Edge MT21 – 2" x 1" Safety Edge for Rolling Doors
The Miller Sensing Edge MT21 (2" W x 1" H) is a durable, flexible safety edge designed for rolling fire doors, rolling steel doors, and material handling systems. When lightly touched, it instantly sends an electrical signal to stop or reverse door operation, providing reliable entrapment protection.
The MT sensing edge product line also includes the MT22 (2" W x 2" H) and MT33 (3" W x 3" H) for larger applications.
Key Features
- Top tab inserts between double-L angle bottom bars on rolling doors
- Flexible vinyl jacket conforms to floor irregularities
- 5–6 inch end flaps create a complete seal (can be trimmed for custom fit)
- Custom manufactured to your specifications (color, length, outlet location)
- Patented Alumaglas™ for superior performance (electric option available)
- Sealed assembly – impervious to dust and debris
- UL 325 Recognized Component
- 1-year warranty
- Proudly made in the USA
Common Applications
- Rolling fire doors
- Rolling steel doors
- Material handling systems
Monitored Sensing Edge Options (T1–T6)
MT21 edges are available with different monitored configurations to match your operator’s requirements. Confirm compatibility with your gate operator manufacturer before ordering, as edges are custom-made and non-returnable.
| Designator | Type | Color Code | Typical Use |
|---|---|---|---|
| T1 | 8.2K Ohm Resistor | Green | European operators |
| T2 | 10K Ohm Resistor | Blue | LiftMaster, Linear, Cornell, Manaras, Raynor, and others |
| T3 | Diode Capacitor | Red | Overhead Door Corporation |
| T4 | Capacitor | White | Linear (transmitter style) |
| T5 | 6.8K Ohm Resistor | Orange | Custom applications |
| T6 | 270K Ohm Resistor | Violet | LiftMaster CPS board |
Complete Monitored Openers Ordering Guide (PDF)
Downloads
MT21 Specifications (PDF)
Gate Edge Handing Guide (PDF)
Product Summary
Miller Sensing Edge MT21 – 2" x 1" flexible safety edge for rolling fire doors, rolling steel doors, and material handling systems. Custom manufactured to your specifications with double-L angle tab for easy installation. Multiple monitored options (T1–T6) available. UL 325 recognized component. Made in the USA.
