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First Alert BRK 3120B Hardwired Smoke Detector with Photoelectric and Ionization with Battery Backup

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Number of Items
First Alert
Prime Eligible
Not Eligible
0.730 Pounds
5 Inches
2 Inches
5 Inches
See Product Details on AmazonSee Product Details on Amazon
  • Dual Photoelectric and Ionization sensing technologies for optimal sensing of smoke particles produced in both flaming and smoldering fires.
  • Two Latching Features
  • Two Silence Features
  • Optipath 360 Technology
  • 2 AA Batteries Included; 10 Year Limited Warranty
The BRK Model No. 3120B is a wire-in, 120V AC 60Hz single and/or multiple station photoelectric and ionization dual sensor smoke alarm specifically designed for residential and institutional applications including sleeping rooms of hospitals, hotels, motels, dormitories and other multi-family dwellings as defined in standard NFPA 101. Model 3120B complies with UL217, CSFM, NFPA 72, HUD, FHA and other agencies that model their codes after the above agencies. It meets building codes where AC/DC photoelectric and ionization combination smoke alarms are required. The BRK 3120B is a state-of-the-ar...
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Customer Feedback
the good
the ok
the bad
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Our old smoke alarms would go off randomly sometimes in the middle of the night.
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No Alarms went off in her bedroom or the living room.
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Both were filled with greenish yellow fumes from slowly burning foam in pillow and mattress.
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Works great.
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Works as described.
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Category: Smoke Detectors & Fire Alarms

The usual price range for a smoke detectors/fire alarm is between $6.44 to $132.36.

If you want to know about smoke detectors/fire alarms in general, please go to our Smoke Detectors/Fire Alarms: Things to Know Before Buying in 2020 page to learn more!

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First Alert 3120B Hardwired Photoelectric Ionization Smoke Alarm… This Hardwired Photoelectric and ...
Editorial Reviews

Jane's Review: Should I buy this product?

Jane's Review

Yes! I recommend this smoke detector/fire alarm based on its brand popularity. Let's go over the reasons why buying this smoke detector/fire alarm now is a good idea, and also things to consider before you decide on this item.

1. FIRST ALERT is a known smoke detector/fire alarm brand

FIRST ALERT doesn't attract too many people on Amazon among other smoke detector/fire alarm brands. But I found some YouTube videos that talk about this product, which means this is a widely known product/brand. I have attached the videos above and links in the additional research section down below, so don't forget to watch and read those!

One thing to be careful about here is that I'm not verifying if this product's maker is a household name or not. This section is more focused on whether this is proven enough by its consumers, whether people actually love this product.

2. This smoke detector/fire alarm has positive reviews on the internet

Some people have a great experience with a product, while some are unlucky and get a defected item and have to go through the whole process of returning them. Since people have different experiences about a product due to various reasons, don't read too much into one good or bad review. Reading multiple reviews with different ratings can help you picture how good/bad the product generally is.

This smoke detector/fire alarm has positivereviews on the internet, and based on current trends, it's likely that people will like this smoke detector/fire alarm more a week later. I summarized what fans and haters say about this product above in the good/ok/bad table, so don't forget to read those since they paint the whole picture! And of course, if you want to read more detailed reviews, many of them are on Amazon!See More Reviews on AmazonSee More Reviews on Amazon

3. Take a look at its price history

image/svg+xml Highest Price Lowest Price $39.99 $27.11

Price is one of the most important factors in making a purchase decision. I analyzed the price of this product in four parts: its recent price change, when it was most expensive/cheapest, its price volatility, and a price prediction I made, just in case you want to wait.

First off, let's talk about its recent price change. The price of this product has not changed recently, which means that it has steady and healthy supply!

Next, we need to look at its highest price and lowest price. Historically, the highest price point for this smoke detector/fire alarm was $39.99, and the lowest price point was $27.11. The current price is nearly the highest it has ever been. If the best price is what you're after, now isn't exactly a good time to buy this smoke detector/fire alarm.

What about its availability and price volatility? This is another aspect we have to dig into before buying something. I haven't seen this product being unavailable since I started reviewing this product. So as far as the availability goes, this product is solid. If you plan to make a repeat purchase of this kind of item, this is your product! In addition, the price tends to stay more or less the same. Not a lot of price movement is expected, but the price could still move in either direction by a smidge.

Considering all this, will the price go up or down in a week? Based on past price points, I expect the price to be $37.85 a week from now. It might be best to wait for a future price drop, but if this product checks all the boxes for you, don't wait to optimize for small gain.

Check Current Price on AmazonCheck Current Price on Amazon

4. Manufacturer has generally positive reviews on their other products

The maker of a product is another factor you want to definitely consider before you buy anything. What if there is a piece missing or there is some defect in the product? With anything you buy online, there is a small chance of this happening. But don't worry too much, because Amazon has an amazing 30-day refund policy (Amazon❤️). Still, you want to make sure that the manufacturer or the seller has been helpful in resolving this kind of problem and/or has been helpful to its customers about general product inquiries. The manufacturer of this product, First Alert (FIRST ALERT), has generally positive reviews on the internet. It's generally a good sign if the manufacturer has good reviews overall. If your purchase decision heavily involves how well they make their products and treat their customers, and if you like this product, I'd go with this product!

5. There are other options you might want to check out

image/svg+xml FIRST ALERT Other similar brands: Kidde First Alert / BRK Brands, Inc. CSH Incorporated

I found 4 brands that have similar products like this one: the same brand as this product, Kidde, First Alert / BRK Brands, Inc., and CSH Incorporated. 'If you're looking for a cheaper alternative, you might want to look at a similar product from Kidde. If you're looking for a smoke detector/fire alarm with best reviews, a product from the same brand as this product gets the best score on the internet. If your primary concern is whether the product is popular and well known, a similar product from the same brand as this product I linked below is a better option. I linked all the similar products in the similar products section so please check them out! Or you can check other similar products on Amazon, too.

See Similar Products on AmazonSee Similar Products on Amazon

That's it! I hope you learned enough about this product to make a purchase decision now. You can always ask me about anything via the bird button on the bottom right corner. Thanks for reading — I'm going to add more analyses on this review, so stay tuned!

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