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Availability of Replacement Carbon Monoxide and Propane Detector  

Updated 02/03/2026 | Published 07/11/2024

Question:

I need to replace a Safe T Alert 70-742 CO LP sensor. It looks like this model is no longer available. Can you please recommend a replacement that will fit in the cut-out? Thanks

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Expert Reply:

Hey Doug, so the only carbon monoxide and propane detector we have at this time is the part # RS54FR which happens to have the dimensions of 4-1/4" long x 2-5/8" wide x 1/2" thick.

The mounting holes can be set at 6 inch or 5-1/4 inch so hopefully what you have matches that.

expert reply by:
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Jameson C
Jameson C. profile picture
Etrailer Expert

Jameson C.

2/3/2026

Hey Doug, did the new carbon monoxide and propane detector fit your existing cut-out? Knowing how the dimensions lined up could help others replacing the same Safe T Alert model.

Doug profile picture

Doug

2/3/2026

@JamesonC It wasn’t exactly the same but fit the opening with no gaps.

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