Johnson Level & Tool JLR300-UNV-RG Universal Green & Red Rotary Laser Detector, Dual Sided Detector, LED Backlit Display
Condition: New
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FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 1 left in stock, order soon!
Arrives
Thursday, Feb 12
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Style: Magnetic Universal Rotary Laser Detector
Features
- Quickly and accurately locates most green and red rotary lasers
- IP54 rated to protect from dust and water ingress
- Dual-sided LED backlit display allows for easy reading
- Fine and coarse mode provides two accuracy options to match required tolerance
- Audible and visual indicators for fast readings
- Rare-earth magnets enable rapid mounting on ferrous surfaces
Description
Dual-Sided Laser Detector w/ Clamp for Green & Red Rotary Lasers
Brand: Johnson
Material: Alloy Steel, Metal
Color: Orange
Style: Magnetic Universal Rotary Laser Detector
Item Weight: 1.38 Pounds
Brand: Johnson
Material: Alloy Steel, Metal
Color: Orange
Style: Magnetic Universal Rotary Laser Detector
Item Weight: 1.38 Pounds
Operation Mode: Manual
UPC: 049448557301
Manufacturer: Johnson Level & Tool
Part Number: JLR300-UNV-RG
Item Weight: 1.38 pounds
Product Dimensions: 10.63 x 7.48 x 2.76 inches
Item model number: JLR300-UNV-RG
Power Source: Battery Powered
Item Package Quantity: 1
Included Components: Dual Sided Detector, LED Backlit Display
Batteries Included?: Yes
Batteries Required?: Yes
Battery Cell Type: Alkaline
Date First Available: June 9, 2024
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Feb 12
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Style: Magnetic Universal Rotary Laser Detector
I got this reciver out of necessity I needed one now. So far so good seems good quality and it works with my topcon rl-h4c. I only tested it at 40ft sunny day and it seems very precise. If it doesnt tomorrow I'll write up a follow up. I've been using it for a week. It works well with the topcon and its precise. The within a quarter inch selection is more like within a 1/8". The precise selection is tight real tight. No regrets I'd buy it again the auto shut off is a nice feature and its solid.
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Reviewed in the United States on July 30, 2025 by Dane
Style: Hard Case Kit
Like many shoppers I spent much time on YouTube looking for product reviews. My personal preference came down to this model or a similar one from Bosch both similarly priced. I was thinking of going with Bosch after seeing a video demonstrating how you can distribute the laser in a limited area. However I decided to go with Jonson as I’ve used many of their other products and been happy with them. Other pros: this one comes in a case, the measuring stick is longer than the Bosch package meaning I can use it for basements and deeper water/irrigation lines. Or go to second floor if necessary during construction. After receiving the unit I found it does have a limited distribution option like the Bosch model. It’s super easy to use, the buttons are dummy proof. There aren’t many so if you can’t figure it out you have the option to just mash buttons till you figure it out... it’s that easy. Cons: the case is big. Not something you’d want to keep in your truck for random use if you’re a general contractor. Also the little pieces like the part that connects the laser detector and measuring rod don’t really have a great home in the case. They just get placed where you find room. Biggest Con so far if I had to pick one is the detector. It’s cheaply made and I’ll probably brake it. With that said the main parts are great. Everything else seems like it will last me a lifetime. The level has a thick built in foam case in the plastic case so it should be good for a long time.
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Reviewed in the United States on January 4, 2021 by Josh Josh
Style: Hard Case Kit
I used this laser level to level a footer for a new home. There were a couple items loose in the carrying case and I can’t see any place to secure them. A pair of glasses doesn’t much matter but the laser detector bracket being loose is disconcerting. The tripod and laser are securely held as is the measuring rod. The tripod leg locks take a lot of force to loosen and I worry they or the small pins holding them could break. The locking handles tend to twist and need to be wiggled till they are perpendicular to the pins before putting the force required to unlock the legs (so the tripod legs can be extended). The 9 volt laser detector battery died in about an hour. I bought high quality replacements for the detector and the 4 C batteries that power the laser, though I have used the unit many times since and the laser housing batteries are still working fine. I would recommend buying high quality batteries and having them in hand. It is easy to use and accurate. I expect to use it for many projects in the future and think it is a good value. The automatic leveling is a great feature. I level the tripod by sight, leave one leg unlocked and then move the unit till the tone stops and then slide the last leg till it hits the ground and lock it in place.
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Reviewed in the United States on December 18, 2021 by Dan
Style: Magnetic Universal Rotary Laser Detector
Replaced the receiver on my old transit. No issues with this one. Helped keep everything level for my massive shop build.
Reviewed in the United States on October 29, 2025 by Alison
Style: Hard Case Kit
We upgraded from an old laser level made about 15 years ago, so we may be a little biased based on how far technology has come, but WOW what an improvement! Everything about this product is top notch, right from the carrying case down to the way the pieces are assembled. This kit is complete and contains everything that you will need to get started, it's exactly what we were looking for. Foremost, the unit is accurate. I mean really dead on accurate. That alone is a great reason to buy this product. Secondly, it really is made out of a durable material. Just holding the laser in your hands you can feel the quality, and on any construction site that is going to go a long way. Lastly, the cost was not bad at all! I honestly would have paid more for this unit. All things considered, 10/10 would buy again!
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Reviewed in the United States on December 8, 2020 by F0URTYK
Style: Hard Case Kit
Outstanding product
Reviewed in the United States on December 10, 2025 by Bob
Style: Magnetic Universal Rotary Laser Detector
The description states "will work with most red/green rotary laser levels." This is somewhat misleading as one reviewer noted that "the receiver does not work with DeWalt laser levels but works only with all Johnson laser levels." The way Amazon has the reviews listed includes the full Johnson laser level kit and then the laser receiver is subtitled in a conglomerate of all available Johnson options. The reviews need to be separated by each available option rather than the current method of throwing everything together as one category, subtitles or not, or provide a category filter. I do not consider the opinion of just one reviewer sufficient enough to make an informed judgement. The fact that Amazon does not oversee the reviews to insure that the reviews directly pertain to the listed item also makes purchasing decisions difficult. I have taken the time to notate when a review does not pertain to the listed product as sellers manipulate the reviews with comments for other products and not the one being reviewed. Whoever is checking for listing accuracy at Amazon is obviously oblivious to their job description and robbing Amazon of doing job one. Logically, if the product is a battery powered 20 volt tool but the review pertains to the 9 volt model it is obvious that the item and the review are not for the same product. Long story short: Johnson is a great product; however, if you have a Dewalt laser level the Johnson Laser receiver is not compatible with the Dewalt system.
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Reviewed in the United States on September 20, 2025 by Consejero
Style: Hard Case Kit
This kit has saved us thousands in surveyor costs, and enabled our field supervisor to quickly verify elevations during grading operations. Set up is easy, and the storage case keeps everything organized. The unit also comes with calibration instructions, which will be great moving forward.
Reviewed in the United States on July 6, 2024 by Kenneth French