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LotFancy Freon Leak Detector for Halogen Gas Leakage, Refrigerant HVAC Leak Detector for CFCs HCFCs HFCs R134a R1234yf R410a R22 R11 Tester, High Accuracy, with Indicator Light

4.2 4.2 out of 5 stars 1,120 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Brand LotFancy
Power Source Battery Powered
Color Yellow, Black
Product Dimensions 2.56"D x 2.56"W x 9.01"H
Alarm Audible, Visual
Operating Humidity 95 percent
Upper Temperature Rating 52 Degrees Celsius

About this item

  • Excellent sensor with maximum sensitivity of 0.21oz/yr, the Freon leak detector detects all kinds of halogen refrigerants including but not limited to CFCs e.g. R11, R12, R13, R113, R114, R500, R502, R503 etc. HCFCs e.g. R22, R123, R124, R401A, R401B, R402A, R403B, R408A, R409A, R414B, R416A etc. HFCs e.g. R23, R134a, R404A, R407C, R410A, R417A, R422A, R422B, R422D, R507, R508B etc. Blends such as AZ-50. HP62. MP39 etc.
  • 7 Adjustable Sensitivity, our refrigerant leak detector can be automatically adjusted to the best optimum detecting state
  • A flexible probe around 7.9-inch can reach to almost any awkward corners or space; More stable hvac leak detector with precise ultra-low power IC design
  • Tricolor display of battery voltage; Siren sound and flashing light for the leak alarm indicator. Make sure to put 4 x AAA alkaline batteries in it. Please pull out the battery holder and install all four batteries
  • We offer 100% satisfaction guarantee and one year warranty
› See more product details

Customer ratings by feature

Easy to use
4.3 4.3
Value for money
3.8 3.8
Accuracy
3.6 3.6
See all reviews
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Product Description

Description:

LotFancy Freon Leak Detector detects all kinds of halogen refrigerants including but not limited to:

  • CFCs e.g. R11, R12, R13, R113, R114, R500, R502, R503 etc.
  • HCFCs e.g. R22, R123, R124, R401A, R401B, R402A, R403B, R408A, R409A, R414B, R416A etc.
  • HFCs e.g. R23, R134a, R404A, R407C, R410A, R417A, R422A, R422B, R422D, R507, R508B etc.
  • Blends such as AZ-50. HP62. MP39 etc.
  • A2Ls

Wide Application:

  1. Detects Ethylene Oxide gas leaks in hospital sterilizing equipment.
  2. Detects SF-6 in high voltage circuit breakers.
  3. Detects halogen gas and most gases which contain chlorine, fluorine, and bromine.
  4. Detects cleaning agents used in dry cleaning applications.

Specification:

  • Working temperature: 0 °C ~ 52 °C.
  • Maximum sensitivity: 6gr/yr(halogen refrigerants).
  • Battery life: about 50 hours under normal use.
  • Response time: instantaneous
  • Operating mode: continuous, unlimited
  • Fixed probe length: 20cm (7.87 inches)
  • Dimension: 22.9 cm x 6.5 cm x 6.5 cm (9.01 x 2.56 x 2.56 inches).
  • Preheating time: about 6 seconds.
  • Reset the time: 2-10 seconds.
  • Electricity source: 6v DC, 4 x AAA batteries.

Package includes:

  • 1 x Instruction manual
  • 1 x Pouch
  • 1 x Halogen leak detector with a probe

Refrigerant Freon Leak Detector

freon leak detector

leakage detector

Flexible Probe:

  • This Freon leak detector is designed with corona sensor so the probe should be very close to the gas leak area. Allows detection in difficult and hard-to-reach areas.
  • Automatic Circuit: when the detector is in a measuring state, the automatic circuit will follow the changing level of halogen gas to avoid false alarm.

Real time sensitivity

  • 7 Adjustable Sensitivity
  • Refrigerant Freon Leak detector, with precise ultra-low power consumption IC design, can be automatically adjusted to the best optimum detecting state.
  • LotFancy refrigerant Freon leak detector features an automatic circuit and a reset function that set itself to ignore the ambient level of Halogen gas.
  • Reset： The leakage detector, upon initial switch-on, can automatically adjust itself to ignore the present level of Halogen gas in 6s and enter into the best state of detection. Place the sensing tip near a known leakage area and switch on, it's easy to find a higher concentration of leakage. Or move to the fresh air and turn on, adjust to the maximum sensitivity, any concentration above zero will be detected.

Leakage Warning

  • When the gas leakage are discovered, "di di" sound will become more hurried. More refrigerant freon leak, more rapid. Meanwhile the indicator light flash quickly.
  • The detector will beep regularly at a slow frequency when turn it on. If leak detected, it will beep in a higher frequency. (2 beeps per second when the detector is open, 10 beeps per second when detect the leak）

Notes:

Halogen Leak Detector

  1. Wait for 6 seconds away from the potential leakage area once the leak detector is switched on for more accurate detection or it may not give the right alarm when you try to detect.
  2. Batteries NOT included. Make sure to put 4 AAA batteries in it.
  3. When detecting, the probe should be moved around the location at a rate no more than 1-2in/second and no more than 1/4in from the surface. Slower and closer movement of the detector will greatly improve the likelihood of finding a leak.
  4. The sensor tip should not be contaminated. False positives are bound to happen as dust, air, and other contaminants can set it off.
  5. In a windy area, even a large leak is difficult to be found. Under this condition, it is better to shield the potential leak area.
  6. The siren is structured so that only constant flow will set the tone off to determine a leak. This means that while the alarm may sound, it will only reach the high-pitch siren when the system has detected a consistent flow of Freon. Jut be warned, that this siren can get pretty loud.

freon leak detector

Simple Operation Instruction

  • Install 4 x AAA battery
  • Turn the knob clockwise to turn on the leak detector, after 6 seconds, it turns into stand-by mode and begins to beep regularly. Then you can start detecting the leak.

Product guides and documents

User Manual (PDF)

Product information

Technical Details

Additional Information

Warranty & Support

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LotFancy

LotFancy Freon Leak Detector for Halogen Gas Leakage, Refrigerant HVAC Leak Detector for CFCs HCFCs HFCs R134a R1234yf R410a R22 R11 Tester, High Accuracy, with Indicator Light

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LotFancy Freon Leak Detector for Halogen Gas Leakage, Refrigerant HVAC Leak Detector for CFCs HCFCs HFCs R134a R1234yf R410a R22 R11 Tester, High Accuracy, with Indicator Light
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PriceCurrently unavailable.$129.99$337.45$21.99-28% $210.64
List: $292.25		$199.99
Delivery—
Get it as soon as Saturday, May 11
Get it as soon as Monday, May 13
Get it as soon as Saturday, May 11
Get it as soon as Saturday, May 11
Get it as soon as Saturday, May 11
Customer Ratings
4.24.2 out of 5 stars1,120
4.34.3 out of 5 stars81
4.74.7 out of 5 stars132
4.24.2 out of 5 stars1,422
4.54.5 out of 5 stars475
4.64.6 out of 5 stars710
Easy to use
4.3
4.5
4.9
4.2
4.4
4.8
Value for money
3.8
4.5
4.8
3.9
4.0
4.5
Accuracy
3.6
4.5
4.9
3.8
4.0
4.5
Sold By
—
Aprvtio
ZQUARED
Elitech Technology Inc.
Amazon.com
Elitech Technology Inc.
power source
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
Battery Powered
upper temperature rate
52 degrees celsius
140 degrees fahrenheit
—
52 degrees celsius
—
20 degrees celsius
style
—
industry
—
modern
Leak Detector
HVAC Tools
alarm
Visual, Audible
leak alarm
Visual
Audible
Audible
Audible
operating humidity
95 percent
95 percent
—
95 percent
—
85 percent
weight
—
1 pounds
3 pounds
0.5 pounds
3.1 pounds
2.75 pounds

Customer reviews

4.2 out of 5 stars
4.2 out of 5
1,120 global ratings

Customers say

Customers like the performance and ease of use of the gas smoke fire alarm. They mention that it works excellent and is simple to use. That said, some complain about the accuracy and say that it gives false readings. Opinions are mixed on quality and leak detection.

AI-generated from the text of customer reviews

110 customers mention89 positive21 negative

Customers like the performance of the gas smoke fire alarm. They say it works excellent, is a great tool, and does a fair job as a detector. Some customers also mention that it works great right out of the box and has had no issues. Overall, most are satisfied with the performance and recommend it to others.

"...have been residual from charging, so I used this and it worked really well immediately. Shipping was fast and the price was fantastic...." Read more

"Works pretty good so far" Read more

"This cheap thing actually works. Clearly identified two different evaporator leaks for me - one in a car, and the other in my attic AC unit...." Read more

"Not fancy but worked great. Used to test Freon leak for homes and cars. Sturdy design with wand that stays in place...." Read more

23 customers mention17 positive6 negative

Customers find the gas smoke fire alarm simple to use. They say the instructions are perfect and it saves a lot of time.

"...any glaring grammar errors (I was skimming), but I felt the instructions were perfect (quick start guide is glued to the device with 5 simple steps)...." Read more

"Very easy to use. My refrigerator had been leaking freon slowly for months, and I had to charge it up about once per month...." Read more

"...Yes, the instructions are the typical Chinese mangled English and the unit will sometimes go beeping berserk...." Read more

"only checked for an a/c leak on a car. im hoping its accurate. very easy to use. priced right" Read more

78 customers mention48 positive30 negative

Customers have mixed opinions about the quality of the gas smoke fire alarm. Some mention that it does a fair job as a detector, is cheap, and easy to use. However, others say that it goes beeping berserk, randomly increases and decreases as they move around the A/C lines, and gets stuck beep fast.

"...I was able to find my leak with it. good deal for the money." Read more

"...the device on and walked into the garage, and the beeping started to increase frequency...." Read more

"...Shipping was fast and the price was fantastic. If you plan on servicing your own AC equipment, this is a great tool to have." Read more

"...Super fast shipping and the best price I could find anywhere! I saw some reviews that said that this sniffer didn't work...." Read more

47 customers mention30 positive17 negative

Customers have mixed opinions about the leak detection of the gas smoke fire alarm. Some mention that it works well for finding a leak in the AC system, while others say that it stops detecting a leak after 30 seconds.

"it does pick up freon leaks and everything else.I was able to find my leak with it. good deal for the money." Read more

"...Using the leak detector, i found that freon was leaking from one of the valves that are used to charge the system. (They ar called Schrader Valves.)..." Read more

"Works as advertised to diagnose leaks." Read more

"...Well, it passed the test, picking up every created leak that I made on an existing system...." Read more

12 customers mention8 positive4 negative

Customers have mixed opinions about the durability of the gas smoke fire alarm. Some mention it's well made and hopes to last a while, while others say it broke within 2 weeks.

"...Used to test Freon leak for homes and cars. Sturdy design with wand that stays in place. Batterys have held up great so far. Using hf cheap batt...." Read more

"Battery back plate. Broken." Read more

"...It looks to be good quality and hopefully lasts me some time." Read more

"...What a bargain! It's well made and looks like it could command a higher price." Read more

17 customers mention5 positive12 negative

Customers are not satisfied with the accuracy of the gas smoke fire alarm. They mention that it gives false readings and can pick up false alarms from water.

"Not accurate at all." Read more

"...I think this applies to all halogen gas detectors: It will read false positive around water...." Read more

"...I'd also like to point out that the results were consistent with the location... my 9-year-olds even tried it and thought it was amazing." Read more

"...The unit would end up giving false readings as going along and I'd have to reset it (easy) and redo the area...." Read more

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5 Stars
Precisó
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Top reviews from the United States

Micheal J. DiTomasso
5.0 out of 5 stars Works well,
Reviewed in the United States on June 24, 2017
Verified Purchase
It works. My mechanic wanted $1000 to change the condenser. He said that since he could not find a leak anywhere else, that was what the problem must be. Using the leak detector, i found that freon was leaking from one of the valves that are used to charge the system. (They ar called Schrader Valves.) Only one was leaking but I changed both of them. I also changed the rubber rings in the plastic caps that cover the valves. The valves were two dollars and change each. A box of rubber rings cost $15 on line. I also had to refill the system with freon. Total cost of repair was under $50. The freon had been leaking out to the point of the AC not working in about two days. It is 6 weeks now and the AC is working fine.

It was a little tricky adjusting the frbovr the first time i used it. But once you get used to it, it is not a problem.
16 people found this helpful
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AngieKC
5.0 out of 5 stars Saved the day and $300 of effort
Reviewed in the United States on June 17, 2016
Verified Purchase
This is going to be a lengthy review by my husband: I'm a car mechanic novice, and decided to upgrade my 17-year-old car's AC after it leaked R134a during the winter, and had no clue that a device like this existed until consulting the forums. This low-cost device saved me from throwing $300 of new parts out the window.

After putting my AC system together and ensuring that everything was torqued to specifications (new O-rings, compressor, accumulator, orifice expansion valve), I pulled a vacuum on the system. Much to my dismay, a leak existed in the system (-28 psi would become -2 psi within an hour). After 2 hours of checking everything in 100 degree garage heat, I decided to purchase a universal AC dye kit and dye. The cost was slightly more than this sniffer device. I injected a few ounces through the manifold (like many Youtube videos describe) and had enough pressure to kick the new compressor on for 20 minutes. I then investigated in the dark for leaks... after an hour of angling a mirror into a hard-to-find place (thanks GM, the Buick Regal 1999 decided to hide the orifice replacement under the brake booster and brake module -- I'd like to know how that passed the design committee), I still couldn't find the leak.

I tried using a stethoscope to listen to leaking sounds, but the bubbling within the system made it hard to make sense of the sounds.

A day later, I tried again, as I felt an ozone layer open above my house as I released another expensive 12-ounce can of Suva into my car. Again, no sign of the dye. My theory is that there wasn't enough circulation through the system to make it to the other side.

I was then under an ultimatum -- I was going to put my car back together and drive it without AC, and consider my investment in a vacuum, compressor, and new tools as a lesson. It was still less than a mechanic would charge.

I then saw a video about using a sniffer tool and decided that solving the leak mystery would be better than giving up, so I ordered (and even paid for overnight shipping). After reading several reviews for this item, I learned the following: Make sure to put 4 (four) AAA batteries in it; some people don't realize it needs 4. Next, know that freon/Suva/134a/R12 sinks -- it's heavier than air. Based on those physics, you need to run the sniffer prob slowly along your pathway, without a fan running. It was worth the puddle of sweat I left on the floor in the hot garage.

Upon putting batteries into the device, I turned the device on and walked into the garage, and the beeping started to increase frequency. I hadn't even approached the car, but then discovered that one of my valves wasn't complete shut off, and the device had picked up on the small leak. Wow!

I then held the device under many of the connections, and within 2 minutes, discovered the leak in the last place I'd expect -- the easiest, most-accessible location. I filled a few ounces of Suva (R134a) into the system without turning the car on, and was jumping for joy. Dye couldn't have found this leak because it was furthest from the dye point and the compressor hadn't carried it far enough. As it turned out, one of the brand-new O-rings was insufficient in sealing the leak.

Based on how easy this device was to use, and how little it costs compared with a dye detection, I highly recommend it in your toolbox, especially if you're a novice. It also works for other types of chlorine/fluorine/bromine gasses, but all I cared about was the R134a detection. I haven't replaced the O-ring yet, but I was excited enough to write this review because of how easy it was to locate. My kids will have AC in my car once again. First world problems....

Edit: After seeing some other reviews, I'd like to point out that my unit did not come with batteries. I used fresh AAA batteries (alkaline). Also, the instruction manual was very detailed, and I didn't notice any glaring grammar errors (I was skimming), but I felt the instructions were perfect (quick start guide is glued to the device with 5 simple steps). The carrying case is padded and will store my sniffer and protect the tip for my next AC adventure, but I'll remove the batteries so that they don't degrade. I'd also like to point out that the results were consistent with the location... my 9-year-olds even tried it and thought it was amazing.
105 people found this helpful
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Aminar
4.0 out of 5 stars does pick up freon leaks
Reviewed in the United States on January 20, 2021
Verified Purchase
it does pick up freon leaks and everything else.I was able to find my leak with it. good deal for the money.
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Mike
5.0 out of 5 stars Excellent tool for AC work, shows you exactly where a leak is.
Reviewed in the United States on August 7, 2017
Verified Purchase
This is a great tool to use when looking for a leak. It detected a leak at the low side Schrader valve on my truck, and when I took off the cap it beeped frequently, confirming where the leak was. I have dye in the oil, and saw some with the UV light, but that may have been residual from charging, so I used this and it worked really well immediately. Shipping was fast and the price was fantastic. If you plan on servicing your own AC equipment, this is a great tool to have.
2 people found this helpful
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Amith K.
3.0 out of 5 stars Not Durable - Inside Spring Loses Tension Over Pretty Short Time
Reviewed in the United States on April 10, 2018
Verified Purchase
The media could not be loaded.
 Purchased this unit back in Sep 2016, Used it barely, just couple of times. Took out again today from packaging, and it never turned on. Checked & replaced the batteries, but nothing happened. So this tool just died on me in 1.5 years of bare use.

<UPDATED 04/13/2018> I took apart the device, and found the spring lost its tension, required to complete the circuit. Pried the metal pieces closer to each other, and now system turns on. Made little video here for other buyers, as I see lot other complained too about unit didn't turn on. Raised from 1 star to 3 star, as it is still a design flaw.
28 people found this helpful
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SCUBAHUNTER
5.0 out of 5 stars Excellent tool
Reviewed in the United States on May 4, 2023
Verified Purchase
Works as advertised to diagnose leaks.
One person found this helpful
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Robert K
1.0 out of 5 stars Nice Deal for the Price - If it Worked
Reviewed in the United States on August 6, 2018
Verified Purchase
I'm writing this review after receiving a second unit which does not work. When the first one arrived, I installed new batteries and turned it on. There was no indicator light as described in the instructions, which should show green if the batteries are good. Amber if not. Thinking I may have misunderstood the function of the light, I toke the unit out and put it it a few feet from a Freon tank and released a small amount of refrigerant. No signal. Thinking a may have gotten a defective unit I processed the return and ordered a second one. It arrived today and does not work either. I was concerned given the price and the fact the closest other leak detector was $150, how this one is $21. I'm returning both units and will look for a more reputable brand at a much high price I'm sure.
7 people found this helpful
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ACTech47
5.0 out of 5 stars Better than expected!
Reviewed in the United States on May 7, 2020
Verified Purchase
I am a certified residential and commercial HVAC tech with 51 years experience. Although retired, I still dabble with repairing central home and auto for family only. This does seem to keep me busier than I would like to be.

I have used all of the old style corded electric to the newest electronic leak detectors. They all work to varying degrees which often leads to an unsuccessful leak locate.

I received this today, installed batteries, and proceeded to run some tests. My main concern was whether or not it would locate R-410a leaks, my main current issues. Well, it passed the test, picking up every created leak that I made on an existing system. It also detected R-134a, R-404 and MO-99 out of the jugs which are the only ones I have available to test.

I'm very impressed, and I'm not impressed easily. If you are a certified tech, don't hesitate to get one of these for your tool bag. You won't be sorry.
One person found this helpful
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Top reviews from other countries

Peter
5.0 out of 5 stars Not bad
Reviewed in Canada on April 10, 2020
Verified Purchase
I haven't use it much but i think it works good, works not as i was hoping but maybe i will have to learn how to use it
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Neil F
4.0 out of 5 stars It did help me find a leak at the low side Schrader valve and at the rear TXV.
Reviewed in Canada on September 6, 2019
Verified Purchase
Quality is suspect but the price is fantastic. Good enough for occasional DIY leak detection.
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Kevin Lee
5.0 out of 5 stars Nice and easy to use
Reviewed in Canada on August 8, 2018
Verified Purchase
Nice and easy to use. Very sensitive, love it. Only complaint is that there is no measurement how much is leaking, which makes me hard to decide where to fix.
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Dana
1.0 out of 5 stars Seen mechanics use this looking for AC leaks!
Reviewed in Canada on January 23, 2020
Verified Purchase
I received a dirty unit when purchased. I'm not certain to the quality.
The unit ai received wasn't sounding correctly. I cleaned the tip, and it still had issues. Book offered instructions for cleansing. Attempted that process and forwarded images of a large amount of dirt inside the tip that came out. White paper towels were used to clean the unit.
Fully refunded.
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sresener
3.0 out of 5 stars Save your money (update) the seller did pull through and gave me excellent service. I would give them 5 stars for service.
Reviewed in Canada on July 24, 2018
Verified Purchase
I had a leak in my house ac. R410 refridgerant.
This unit could not detect anything. For fun the air conditioner tech opened a valve while filling up my refrigerant to see if it worked. Well you could hear the gas leaking from 10 feet away from the valve and this gauge barely detected it. How it could detect a tiny leak "which most are" is beyond me.
This thing is useless junk and I would be highly skeptical of any positive reviews.

I noticed the seller commented on this, but they have made no attempt to contact me personally via email. and its also funny how amazon will not let me reply.

I wanted to update that the seller contacted me and gave me a full refund. Maybe I received a defective unit, but it is nice to know that the seller backs what they sell.
2 people found this helpful
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