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List unavailable.Safe T Alert 20 Series Mini LP Gas Alarm - Propane Alarm - Surface Mount, White - 20-441-P-WT
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Purchase options and add-ons
| Brand | Safe T Alert |
| Style | White, Surface Mount |
| Power Source | Hard-Wired |
| Color | White |
| Product Dimensions | 1.25"D x 3.5"W x 2.5"H |
| Item Weight | 0.01 Ounces |
| Alarm | Audible |
| Sensor Type | Propane |
| Global Trade Identification Number | 00715456204413 |
| Unit Count | 1.0 Count |
About this item
- BUILT FOR RVS – Compact surface mount design ideal for Travel Trailers, Fifth Wheels, Truck Campers, and Folding Campers. Engineered for rugged RV environments.
- ADVANCED PROPANE DETECTION – Alarm Mute button allows safe ventilation while the rapid recovery sensor reactivates if propane levels remain dangerous. Alarm activates at <25% LEL of propane or methane.
- RELIABLE 12V POWER – Operates on 12v DC (75mA @ 12v DC) for dependable, battery-free protection. Innovative circuitry conserves power for long-term use.
- SPACE-SAVING & EASY TO INSTALL – Compact case size: 3.5″W x 2.5″H x 1.25″D with included mounting bracket for simple installation in tight spaces.
- DESIGNED FOR HARSH CONDITIONS – Operates in temperatures from -40°F to +158°F.
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From the brand
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Peace of Mind Since '79
Safe T Alert has been depended on for years to keep campers and boaters safe with our alarms. Whether you're parked at the campsite, or out on the water, enjoy the peace of mind knowing Safe T Alert has you covered.
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Find the right alarm for you!
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What problem are we solving?
We help campers and boaters quickly swap out their expired alarms with our universal fit alarms so they can continue doing what they love!
How did we get our start?
Family owned since 1979, Safe T Alert by MTI Industries has been dedicated to reliably keeping outdoors enthusiasts safe for decades.
Will a Safe T Alert Alarm work in my RV or Boat?
Yes! Shop to find the one that will work for you, choosing between flush mount models, surface mounts, or even a trim kit to make for an easy install.
Product description
Safe T Alert - Mini Dual LP/CO Alarm - Surface Mount Black - 25-741-BL
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Safe T Alert - Mini LP Gas Alarm - Surface Mount Black - 20-441-P-BL
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Safe T Alert - Dual LP/CO Alarm - Surface Mount Black - 35-741-BL
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Safe T Alert - Dual LP/CO Alarm - Flush Mount Black - 35-742-BL
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Safe T Alert - Mini Dual LP/CO Alarm - Flush Mount Black - 25-742-BL
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Add to Cart
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Add to Cart
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| Customer Reviews |
4.4 out of 5 stars 55
|
— |
4.5 out of 5 stars 292
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4.6 out of 5 stars 2,327
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4.6 out of 5 stars 92
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| Dimensions | 3.5" w x 2.5" h x 1.25" d | 3.5" w x 2.5" h x 1.25" d | 6" w x 1 7/8" h x 1 1/4" d | 6.375" w x 2.875" h x 1.25" d | 4.5" w x 3.25" h x 1.25" d |
| Universal Replacement | no data | no data | no data | no data | no data |
| Direct Replacement | ✓ | ✓ | ✓ | ✓ | ✓ |
| Alarm Type | Dual | Propane/LP Only | Dual | Dual | Dual |
Product information
| Power Source | Hard-Wired |
|---|---|
| Alarm | Audible |
| Sensor Type | Propane |
| Product Style | White, Surface Mount |
|---|---|
| Color | White |
| Item Dimensions D x W x H | 1.25"D x 3.5"W x 2.5"H |
|---|---|
| Item Weight | 0.01 Ounces |
Warranty & Support
Feedback
| Brand | Safe T Alert |
|---|---|
| Model Number | 20-441-WT |
| Global Trade Identification Number | 00715456204413 |
| Number of Items | 1 |
| Manufacturer | MTI Industries |
| UPC | 715456204413 |
| Mfr Part Number | 20441WT |
| Unit Count | 1.0 Count |
| Item Type Name | Safe-T-Alert 20-441-P-WT Mini Hard-Wired Propane/LP Gas Alarm - 12V, 20 Series, White |
| Built-In Media | Safe-T-Alert 20-441-P-WT Mini Hard-Wired Propane/LP Gas Alarm - 12V, 20 Series, White |
| Best Sellers Rank |
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| ASIN | B000FLLWGA |
| Customer Reviews |
4.7 out of 5 stars |
Product guides and documents
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What's in the box
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
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Reviews with images
Can be user installed.
Top reviews from the United States
- 5 out of 5 stars
Exact replacement for OEM detector every 60 months.
Reviewed in the United States on March 23, 2026The propane detector monitor that came with my 2021 grand design camper trailer says replace after 60 months, at 60 months and 2 weeks it started beeping. Time to replace. I bought this white one instead of the black like was original just because, it is the exact size, fits on the existing bracket (it does come with a bracket but I didn't want to take screws out. I used butt connectors to connect this unit to the existing wires after I SHUT OFF ALL POWER EVEN THE BATTERY DISCONNECT ALWAYS SHUT OFF ALL POWER BEFORE DOING ELECTRICAL WORK and easily crimped it in and voila, good for another 60 months. Easy to replace, easy to keep myself alerted to propane leaks.
One person found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
RV gas
Reviewed in the United States on May 13, 2026Direct replacement for the original version. Works good
Sending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Exactly like our old one that failed!
Reviewed in the United States on April 15, 2026This was the exact replacement of the one we had in our rv! Easy to hook up!
Sending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Can be user installed.
Reviewed in the United States on May 22, 2026Easy to remove old and install new IF the original was installed WITH ENOUGH SLACK in the Wiring to remove abd replace. This Safe-T- alert propane alarm is the EXACT brand and model currently up for replacement in my 2013 travel trailer. I trust the Safe - T - Alert brand.

Easy to remove old and install new IF the original was installed WITH ENOUGH SLACK in the Wiring to remove abd replace. This Safe-T- alert propane alarm is the EXACT brand and model currently up for replacement in my 2013 travel trailer. I trust the Safe - T - Alert brand.
Sending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 4 out of 5 stars
Good replacement item
Reviewed in the United States on March 28, 2025Still working great after a year now.
Sending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Must have for your RV
Reviewed in the United States on December 10, 2025Anyone who owns an RV knows that they are for the most part propane powered. This monitor replace the faulty one in our RV. It was an easy 5 minute install. Looks better than the ugly brown OEM one and my wife especially feels much safer not hearing the old one go off because it was faulty. Functions great and provides safety.
One person found this helpfulSending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
I would purchase again.
Reviewed in the United States on May 26, 2026A great replacement item for the RV.
Sending feedback...Sending feedback...HelpfulThank you for your feedback.Sorry, we failed to record your vote. Please try againThanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again - 5 out of 5 stars
Great quality and price
Reviewed in the United States on November 23, 2025This fit the wall mount I had perfectly. I was hoping to get a black one, but the white was available. So glad I could find the same alarm that came in my camper when I purchased it.
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Top reviews from other countries
ZENZILE515 out of 5 starsParfait !
Reviewed in Canada on April 9, 2021Je viens de recevoir l article. La date de fabrication est de seulement 2 mois, donc j en ai bien pour 5 ans ! Facile à installer, j ai fais un test avec une torche à propane, diffusion pendant 5 seconde de gaz et l avertisseur à sonner 10 secondes après !
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Gregory Smith4 out of 5 starsColour of unit
Reviewed in Australia on March 21, 2021Would have liked the option to purchase a black unit as it was replacing an existing one
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Pete B.5 out of 5 starsOnce installed it pasted the sniff test--I used a Butane camp stove canister as the nozzle protrudes and is easily accessible. Word of caution
Reviewed in Canada on July 3, 2018Fast delivery, The build date was within a month of the install. The hardest part of the install was fabricating a patch over the hole left by the replaced unit. Once installed it pasted the sniff test--I used a Butane camp stove canister as the nozzle protrudes and is easily accessible. Word of caution, wear ear protectors when you test as you are very close to the unit and the noise is very high pitched. The unit did not come with screws--don't know if that was in error or not. If not you will need 4 number-4 X 1/4" flat or round head screws and the necessary wire connectors to join the new unit to the existing wires.
Sending feedback...Thanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again
Amazon Customer5 out of 5 starsPerfect for replacement of end of life monitor
Reviewed in Canada on February 19, 2020It replaced the same unit in less than 5 minutes. Easy installation as I simply pulled off out of date unit and replaced new one.
I think the price was high but you can’t stay in an RV without a functional monitor in place.
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Andre Boulanger4 out of 5 starsOut of date
Reviewed in Canada on May 30, 2020Very easy to install and works as it should. This unit it to be replaced every 5 years. My only disappointment with the unit is it's old stock. I opened the package to install it to keep the family safe I installed it. The date is from 2018. It is now 2020. I already lost 2 years on this unit. I wrote the installed date hoping that it lasts more than the 3 years left
Sending feedback...Thanks, we'll investigate in the next few days.Sorry, We failed to report this review. Please try again
Product summary presents key product information
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Product Summary: Safe T Alert 20 Series Mini LP Gas Alarm - Propane Alarm - Surface Mount, White - 20-441-P-WT
From Safe T Alert
About this Item
- BUILT FOR RVS – Compact surface mount design ideal for Travel Trailers, Fifth Wheels, Truck Campers, and Folding Campers. Engineered for rugged RV environments.
- ADVANCED PROPANE DETECTION – Alarm Mute button allows safe ventilation while the rapid recovery sensor reactivates if propane levels remain dangerous. Alarm activates at <25% LEL of propane or methane.
- RELIABLE 12V POWER – Operates on 12v DC (75mA @ 12v DC) for dependable, battery-free protection. Innovative circuitry conserves power for long-term use.
- SPACE-SAVING & EASY TO INSTALL – Compact case size: 3.5″W x 2.5″H x 1.25″D with included mounting bracket for simple installation in tight spaces.
- DESIGNED FOR HARSH CONDITIONS – Operates in temperatures from -40°F to +158°F.
Product Description
Important Information
Proposition 65 Warning for California Consumers
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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