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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Elitech 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

🎯Detects all halogen refrigerants

🔧7-level adjustable sensitivity down to 0.21oz/yr

⏱️Ultra-fast 3-second response & 6-second warm-up

7715 som

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Description

🚀 Leak detection redefined: Fast, precise, and foolproof.

READY WHEN YOU ARE - Power up and start detecting in under 10 seconds—because downtime is not an option.
INSTANT LEAK ALERTS - Dual audible and visual alarms ensure you never miss a critical refrigerant escape.
FLEXIBLE REACH PROBE - 7.9-inch bendable probe accesses the toughest HVAC nooks and crannies effortlessly.
CUSTOM SENSITIVITY CONTROL - Dial in your detection power with 7 adjustable levels, catching even the tiniest leaks before they escalate.
UNIVERSAL HALOGEN DETECTION - Pinpoint leaks across R22, R134A, R410A, 1234YF & all halogen refrigerants with unmatched precision.

The Elitech WJL-6000S Freon Leak Detector is a professional-grade HVAC tool engineered for rapid and accurate detection of all halogenated refrigerants including R22, R134A, R410A, and 1234YF. Featuring a 7-level adjustable sensitivity down to 0.21oz/year, dual audible and visual alarms, and a flexible 7.9-inch probe, it delivers fast 3-second response times with a minimal 6-second warm-up. Lightweight and battery-powered, it’s designed for HVAC pros who demand precision and speed in leak detection.

Specifications

ASIN	B015FK1EH2
Alarm	Audible, Visual
Best Sellers Rank	#10,385 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 (5,340)
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 °C

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