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Elitech · Elitech Freon Leak Detector Halogen Refrigerant Gas Leak Detector HVAC Tester AC Sniffer R22 R410A R134A 1234YF, WJL-6000S
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A handheld halogen refrigerant leak detector with a 7.9 inch flexible probe, seven sensitivity levels selected on a knob, a stated maximum sensitivity of 0.21 oz/yr, a six second warm up, a response quoted within three seconds, audible and visual leak indication and dual battery indicators. It triggers on every halogenated refrigerant the listing names and on halogenated compounds generally, which is both the reason to buy it and its one real limitation: it confirms that something halogen bearing is escaping at that joint, never what that something is.
A halogen sniffer answers yes, not which gas
The first bullet is a list: R22, R134a, R404A, R410A, R1234yf, and then all halogenated refrigerants including HFCs, CFCs, HCFCs and blends. Read that as one claim rather than five.
What those refrigerants share is halogen content. Chlorine in the older CFC and HCFC gases, fluorine in the HFCs, fluorine again in the HFO family that R1234yf belongs to. A halogen sensitive detector is built to notice exactly that chemistry, which is why one sensor covers a list this long without the manufacturer having to claim anything clever.
The consequence runs in both directions. In your favour, a single instrument works on a domestic split system, a cold room, a car and a thirty year old chiller, and keeps working when the industry changes gas again. Against you, the reading is a yes, not an identification. If a system arrives with no label and a service history you cannot trust, this will find the leak and leave the charge an open question.
It also means the instrument has no way to ignore other halogen carrying vapours. Some cleaning solvents and aerosol propellants are halogenated, and a sensor tuned to fluorine and chlorine cannot tell those from a refrigerant. That is not a defect in this product. It is the price of the breadth in bullet one, and it is the reason a trigger should always be reproduced after the area has been ventilated. Our guide to why leak detectors miss small leaks covers the opposite failure, the one that costs you a return visit.
Six seconds ready, and three seconds to answer
Two timing figures are published, and they do different work.
The six second warm up is about whether the tool gets used properly. Sniffing is a stop and start activity: zero in clean air, sweep, withdraw, zero again. An instrument that is usable six seconds after the switch supports that cycle. One that needs a long stabilisation gets left running all day, or worse, gets used while the sensor is still drifting upward on its own.
The three second response figure sets how fast you are allowed to move. A sensor cannot report gas it has not yet drawn in, so the probe has to dwell near each candidate point long enough for the sample to reach the element and for the alarm to react. With a three second response, a sweep that covers a brazed joint in one second has not interrogated it. Slow, overlapping passes around every fitting, with the probe held underneath where the refrigerant tends to settle, is what the figure asks of you.
What the bullets never mention is zeroing. There is no statement about whether the detector re zeroes itself against a rising background, which is the behaviour that decides how it copes once a sizeable leak has filled the space you are working in. Treat it as a manual instrument: step out, reset, come back.
Reading the maximum sensitivity against the leaks you actually chase
The published figure is 0.21 oz/yr at maximum sensitivity, which the bullet describes as enough to self check an automotive air conditioning system. Convert it and the claim looks reasonable rather than inflated: 0.21 ounces is about six grams, so the threshold is a loss of roughly six grams of refrigerant a year.
That is a genuinely small leak. A car system that is noticeably weak by the end of summer has lost a significant fraction of a charge measured in hundreds of grams, not six. So the instrument has headroom for the job the bullet names, and the bullet does not pretend to more than that. Matching the claim to the number is a small piece of honesty worth crediting.
The gap is what happens at the other six settings. Maximum sensitivity is also the setting most likely to alarm on ambient contamination, so real work is often done two or three steps down, and the listing publishes no threshold for any step except the top one. You cannot say from this page what the instrument detects on level four, which makes level four impossible to quote to a customer.
Seven steps on a knob, and why you will use most of them
Seven levels sounds like a specification padded for the bullet. In practice it is the control you reach for most.
The reason is that leak location is a two stage process. The first stage is finding the region, done at high sensitivity, sweeping broadly, accepting that you may be chasing a cloud rather than a source. Once the detector is alarming over a whole area, high sensitivity has stopped being useful: everything triggers, and the loudest point is lost in the general response.
The second stage is pinpointing, and it needs the instrument deliberately desensitised so that only the strongest concentration still trips it. Stepping down one or two levels at a time, and watching where the alarm survives, is how you get from the right corner of an engine bay to the right fitting.
A knob with discrete steps suits that better than a single button cycling through modes, because you can feel where you are without taking your eyes off the probe. It is one of the better ergonomic choices in this part of the market. The automotive leak detector comparison sets it against instruments that offer two or three levels.
What the bullets never say about the sensor itself
| Specification | Published in the listing |
|---|---|
| Gases detected | R22, R134a, R404A, R410A, R1234yf, all halogenated refrigerants, HFCs, CFCs, HCFCs and blends |
| Maximum sensitivity | 0.21 oz/yr |
| Sensitivity levels | Seven, selected on a knob |
| Warm up time | 6 seconds |
| Response time | Within 3 seconds |
| Probe | 7.9 inch, flexible |
| Indication | Audible and visual, plus dual battery indicators |
| Support | US technician support by email and phone |
| Sensor type | Not stated in the listing bullets |
| Sensor service life or replaceability | Not stated in the listing bullets |
| Sensitivity at levels one to six | Not stated in the listing bullets |
| Rating for use around flammable A2L refrigerants | Not stated in the listing bullets |
| Compliance with a detector performance standard such as EN 14624 | Not stated in the listing bullets |
| Battery type, count and runtime | Not stated in the listing bullets |
| Automatic zeroing | Not stated in the listing bullets |
| Operating temperature range | Not stated in the listing bullets |
The sensor type is the omission that matters, because in this category it predicts almost everything else. Heated diode elements are consumable and have a known service life. Corona discharge and infrared designs behave differently again, in sensitivity, in drift and in how they cope with oil mist. Without that one word, the running cost of the instrument is unknown, and so is what happens to the 0.21 oz/yr figure after a year of use.
The A2L blank is the one to resolve before buying. R1234yf is in the product title and is a mildly flammable refrigerant, and a page that advertises it ought to state what the instrument is approved to do in that atmosphere. Our explainer on A2L leak detection tools sets out what to ask for.
The buyer this suits, and the job it should not be taken on
This suits someone maintaining systems whose refrigerant is already known and written on the plate: a workshop doing automotive air conditioning, a maintenance technician with a mixed estate of older split systems and cold rooms, an owner checking a system that is losing charge slowly. Broad gas coverage, fast readiness, fine sensitivity control and a long flexible probe are the right set for that work, and the sensitivity claim is scaled honestly to the job the listing names.
Skip it if your work is dominated by A2L refrigerants and the compliance question in the table has not been answered for you in writing, or if you need an instrument that reports a concentration in ppm rather than an alarm, or if you have to document a leak rate to a named test standard. The breadth that makes this detector useful everywhere is also what stops it from telling you anything specific.
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Frequently Asked Questions
Will it tell me which refrigerant is leaking?
No, and nothing in the listing claims it will. A halogen sensitive detector responds to the halogen atoms in a compound, which is what R22, R134a, R404A, R410A and R1234yf all have in common. The instrument reports that halogen bearing vapour is present at the probe tip. Identifying the charge is a separate job, done from the system label, the service record or a refrigerant identifier. On a system whose charge you already know, that limitation costs you nothing.
How sensitive is 0.21 ounces per year in grams?
About six grams a year, since an ounce is roughly 28.3 grams. That is a very small loss, far below the rate at which a car air conditioning system noticeably loses performance over a season, which is why the bullet claims it is enough to self check an automotive system. The figure applies at maximum sensitivity only. The listing does not publish a threshold for the other six settings.
What can set it off apart from refrigerant?
Anything else carrying halogens. Some aerosol propellants, some brake and contact cleaners and some solvent vapours are halogenated, and a sensor built to notice fluorine and chlorine cannot distinguish them from a refrigerant. The practical habit is to ventilate the area, zero the instrument away from the suspect joint, and treat a trigger near a bench where solvents were used as something to confirm rather than something to believe.
Is it approved for use around flammable A2L refrigerants?
The title names R1234yf, which is classed A2L, meaning mildly flammable. The bullets say nothing about whether the instrument itself is rated or certified for operation in an atmosphere that may contain a flammable refrigerant, and they do not name the sensor type, so there is no way to reason about ignition risk from the page. Anyone servicing A2L systems should get that answer from the manufacturer in writing before buying on the strength of the title.
Why does the six second warm up matter?
Because a sniffer is an instrument you turn on and off repeatedly during one job. You zero it in clean air, sweep a joint, step away, zero again, come back. A tool that is ready in six seconds fits that rhythm. One that needs a minute to stabilise gets switched on once and left running, which flattens the batteries and encourages you to sweep while the sensor is still settling.
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