The sensor seems not to work, how can I detect by myself?

Second application, first time it worked well, but now it beeps two times a second, yet doesn’t detect even a direct stream of r-22 vapor. ??

Does this detect the smell of Freon refrigerant etc.? Or does it alert you for a leak if it feels air blowing on the sensor? Thank you

I am currently a student at a local college working on my last semester of refrigeration and air conditioning technology, I have used this sensor to detect R-22 and R-134a leaks and verified it with a much more expensive sensor. It works for these two refrigerants and yes, it detects the gas not just air. I also use soap bubbles once I have verified the location of the leaks. Best $20.00 I ever spent.

Will this unit detect R421a?

The product packaging specifically indicates it will detect R134a, R410a, R12, R22 and R600a (and I've only used mine for R134a), but I'm guessing it'll work with pretty much any commonly used CFC-based refrigerant.

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Freon Leak Detector Halogen Refrigerant Gas Leak Detector HVAC Tester AC Sniffer R22 R410A R134A 1234YF, WJL-6000S

Product ID: 25200165

Details

Alarm
Audible Visual
Brand
Elitech
Color
WJL-6000
Item Weight
7.2 ounces
Operating Humidity
95 percent
Power Source
Battery

🎯7 adjustable sensitivity levels down to 0.21oz/yr

🔔Dual audible & visual leak and battery alerts

🛠️7.9-inch flexible probe for hard-to-reach leaks

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427 kr

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Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔍 Detect leaks like a pro—because your HVAC game deserves elite precision!

INSTANT ALERTS - Dual audible and visual alarms keep you informed on the spot—never miss a leak.
PRO GRADE REACH - Flexible 7.9-inch probe accesses tight, hidden spots others miss.
READY WHEN YOU ARE - Fast 6-second warm-up means you’re detecting leaks before your coffee’s cold.
PRECISION LEAK DETECTION - Pinpoint halogen refrigerant leaks within 3 seconds—no more guesswork.
CUSTOM SENSITIVITY CONTROL - Tailor detection sensitivity to your exact HVAC needs with 7 easy settings.

The Elitech WJL-6000S Freon Leak Detector is a professional-grade HVAC tool designed to detect all halogenated refrigerant gases including R22, R134A, R410A, and more. Featuring a rapid 3-second response time, 7 adjustable sensitivity levels down to 0.21oz/year, and a flexible 7.9-inch probe, it ensures precise detection even in hard-to-reach areas. Equipped with dual audible and visual alarms and dual battery indicators, it offers reliable, on-the-spot alerts. Lightweight and battery-powered, it’s optimized for fast, efficient leak detection with 24/7 US technician support.

Specifications

ASIN	B015FK1EH2
Alarm	Audible, Visual
Best Sellers Rank	#5,766 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Gas Detectors & Alarms
Brand	Elitech
Color	WJL-6000
Customer Reviews	4.2 4.2 out of 5 stars (5,254)
Enclosure Material	Metal, Plastic, Rubber
Item Dimensions D x W x H	1.37"D x 1.37"W x 5.9"H
Item Weight	7.2 ounces
Manufacturer	Elitech
Mfr Part Number	WJL-6000
Model Number	WJL-6000
Number of Items	1
Operating Humidity	95 percent
Power Source	Battery Powered
Product Style	modern
Sensor Type	Ionization
UPC	705911761681 841161102970 841161102918
Unit Count	1 Count
Upper Temperature Rating	52 Degrees Celsius

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