An RV carbon monoxide alarm can look similar to a propane or combination LP/CO detector, but it is a different device. MTI Safe-T-Alert 62-541 and 62-542 models monitor carbon monoxide only and use the RV's 12V electrical supply. BRK 1039885 is a separate battery-powered CO alarm. Use this guide to compare housing size, power source and mounting style before replacing an alarm.
Three different carbon monoxide alarm housings
The same sensing purpose does not mean the same wiring, opening or attachment. Compare the case and the installed mounting arrangement, rather than using only the approximate face width.
MTI 62-541
12V DC nominal RV supply
MTI 62-542-TR
12V DC nominal RV supply
BRK 1039885
Wall or ceiling mounting
Compare exact CO-only model numbers
| Model | Mount | Power | Case dimensions |
|---|---|---|---|
| 62-541-BL | Surface mount | 12V DC nominal | 3½ × 2½ × 1¼ in case |
| 62-542-BL-TR | Flush mount, trim ring | 12V DC nominal | 4½ × 3¼ × 1¼ in case |
| 62-542-WT-TR | Flush mount, trim ring | 12V DC nominal | 4½ × 3¼ × 1¼ in case |
| 1039885 | Wall or ceiling mount | Battery powered | 4½ in diameter × 1.6 in high |
62-541-BL is the black, surface-mounted 62-series alarm. 62-542-BL-TR and 62-542-WT-TR are flush-mounted variants with trim rings in black and white. The case dimensions above do not establish the size of a previous alarm's wall cutout.
MTI specifies the RV 62-series for 12V DC nominal operation and an alarm service life of five years. The separate battery-powered BRK model needs its own specified battery, replacement schedule and approved mounting location; it should not be treated as a direct wiring replacement for MTI.
Before choosing a replacement CO alarm
Look for the model number, date and power requirement on the existing alarm. Confirm whether it is carbon-monoxide only or a combination propane/CO detector. Note whether the old housing is surface-mounted or recessed. Check the actual opening, case depth, fasteners, trim ring, approved location and power connections against the exact new alarm manual.
If a CO alarm sounds, move everyone to fresh air and contact emergency services from outside. Do not return to the RV until it has been declared safe. An alarm's silence button does not make a carbon-monoxide hazard disappear.
Compare product photos and original part numbers
These product cards link to the corresponding NewRVParts catalog records. Compare the exact part number and mounting type before ordering; current availability is shown on the product page. NewRVParts ships from supplier warehouses and does not offer in-person viewing or pickup.
Other RV propane and safety references
Manufacturer model information
See the MTI Safe-T-Alert 62-541 surface alarm and 62-542 trim-ring alarm references for RV specifications. Read the instructions included with the exact detector for installation and replacement requirements.