Liftmaster K41-39254, REFLECTOR AND BRACKET WITH HARDWARE
The LiftMaster K41-39254 reflector and bracket kit is the service kit for the reflector side of the LMRRUL monitored retro-reflective photoelectric sensor. A retro-reflective photo eye uses a sensor head on one side and a reflector target on the opposite side. If the reflector is cracked, missing, dirty, poorly mounted, or out of alignment, the sensor may not see a clear return signal and the gate operator may refuse to run, reverse, or show a monitored safety fault.
This kit is commonly used after damage from vehicles, landscaping equipment, vandalism, weather exposure, or incorrect mounting. It includes the reflector and bracket hardware needed to restore the reflective target, but it does not replace the wired LMRRUL sensor head or correct wiring faults. Correct alignment and vertical mounting are important. Safety sensors are part of the gate entrapment protection system, so installation should follow the operator manual and applicable safety requirements.
Compatible With
Common Compatible Models
- LiftMaster LMRRUL monitored retro-reflective photoelectric sensor
- Gate operator systems using LMRRUL as a monitored retro-reflective safety photo eye
Additional Model Families to Verify
- LiftMaster, Chamberlain, and Elite gate operators only when paired with LMRRUL and approved monitored safety inputs
- UL325 monitored entrapment protection installations where the parts diagram calls out K41-39254
Important Compatibility Notes
- Reflector kit only; not the complete LMRRUL sensor
- Reflector should be mounted vertically and aligned to the sensor head
- Do not bypass monitored safety devices
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Reflector and bracket kit |
| Part Number | K41-39254 |
| Application | Reflector service for monitored retro-reflective photoelectric sensor |
| Compatible Operator Type | Gate operator monitored safety sensor applications |
| Compatible Sensor | LMRRUL |
| Approximate Reflector Dimensions | 2.6 in x 4.72 in x 2.0 in with hood, where listed |
| Included Components | Reflector, bracket, reflector cover, and hardware as supplied |
Also Known As / Related Part Numbers
- K41-39254
- 41-39254
- K4139254
- Reflector and bracket with hardware
- LMRRUL reflector kit
- LMRRUL reflector and bracket kit
- Reflector cover and mounting hardware kit
Technician Note
If a gate operator shows a photo eye fault, inspect alignment, reflector condition, wiring, sensor power, monitored input settings, and obstruction before replacing parts. A reflector kit will not fix a failed sensor head or wiring issue.
Before Ordering
- Confirm the installed sensor is LiftMaster LMRRUL.
- Inspect whether the reflector, bracket, cover, or hardware is the damaged component.
- Confirm the sensor head is working before ordering only the reflector kit.
- Mount and align the reflector according to the LMRRUL and operator instructions.
- Never bypass a monitored safety sensor to force gate operation.
Professional Advisory
Gate safety devices are life-safety components. If the operator will not run because of a monitored sensor fault, correct the safety issue rather than bypassing it. Use a qualified gate technician when alignment, wiring, or UL325 entrapment-protection setup is uncertain.
Product Questions and Answers
Is K41-39254 a complete photo eye?
No. It is the reflector and bracket with hardware for the LMRRUL monitored retro-reflective sensor.
What sensor is this reflector kit compatible with?
It is used with the LiftMaster LMRRUL monitored retro-reflective photoelectric sensor.
Can I mount the reflector horizontally?
References for this reflector kit note vertical mounting. Follow the LMRRUL instructions and operator manual for proper alignment.
Will this clear a monitored photo eye fault?
It may if the reflector is damaged, missing, or misaligned, but wiring, sensor head failure, obstruction, or input setup can also cause faults.
Can the gate be used without the reflector?
No. Do not bypass or defeat monitored safety devices. The reflector must be properly installed for the retro-reflective sensor to operate correctly.
