cant get the alarm to stop sounding any ideas hit the reset changed the batteries still ng ?

Check to see if there is water in the tip. If there is a lot of moisture or water in the actual sensor the alarm will go off non stop.

LS790B to detect all non-combustible CFC, HCFC, HFC, SF6 gases and blends. 404a is hp62, so if you go by item description from cps website the answer is no

How accurate it finds leaks

I was able to find the small lea that was in the back of the blower unit in a matter of minutes. The AC repairman wanted $100 to take out his tester. I was able to quickly point the leak out to the repairman without paying for his time to troubleshoot.

How accurate it finds leaks

My husband really likes this detector and says it is extremely accurate. He didn't like the detector, either, until he read the directions carefully. When working in a refrigerant saturated area (like inside a cooler where a unit has been leaking), the detector will "sound off" continuously. You must keep "clearing" the unit in order to "pinpoint" the leak and keep your "sensitivity" level about half-way. Also, the "tip" of the leak detector must be "clean" and on tight. If the "tip" is loose, the unit will continuously "sound off". This CPS detector replaced an older, popular brand name unit that cost 3x as much and he likes this one better.

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CPS LS790B Leak-Seeker - Electronic Leak Detector with 0.25 oz/yr Sensitivity, Flex Probe, and High-Intensity Bar Graph Display

CPS LS790B Leak-Seeker - Electronic Leak Detector with 0.25 oz/yr Sensitivity, Flex Probe, and High-Intensity Bar Graph Display

Product ID: 766092

Details

Alarm
Audible
Brand
BBK
Color
Yellow
Global Trade Identification Number
Item Weight
3.2 ounces
Manufacturer
CPS Products

🎯0.25 oz/yr ultra-sensitive detection

📊High-intensity bar graph display

🔍Patented Ion-Pump sensor tech

198474 Ft

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Description

🔎 Detect leaks before they detect you — stay ahead with CPS Leak-Seeker!

EFFORTLESS CALIBRATION - Automatic calibration eliminates manual tweaks, letting you focus on the job with confidence.
NEXT GEN ION PUMP SENSOR - Patented sensor technology guarantees reliable detection across all CFC, HCFC, and HFC refrigerants.
HUMIDITY PROOF PERFORMANCE - Built-in water vapor filter maintains accuracy even in high humidity environments—work anywhere, anytime.
INSTANT VISUAL AUDIBLE ALERTS - Over 100 tones plus a vivid bar graph display provide real-time feedback for fast, precise leak identification.
PINPOINT PRECISION LEAK DETECTION - Detects refrigerant leaks as small as 0.25 oz/year, ensuring no costly escapes go unnoticed.

The CPS LS790B Leak-Seeker is a cutting-edge electronic refrigerant leak detector featuring patented Ion-Pump sensor technology and automatic calibration. With an ultra-sensitive detection threshold of 0.25 oz/year, a flexible probe, and a high-intensity bar graph display, it delivers precise, reliable leak detection across all common refrigerants. Its patented water vapor filter ensures stable performance in humid conditions, making it an indispensable tool for HVAC professionals seeking accuracy and efficiency.

Specifications

ASIN	B0002NYBDM
Alarm	Audible
Best Sellers Rank	#1,145,571 in Automotive ( See Top 100 in Automotive ) #190 in Air Conditioning Leak Detection Tools
Brand	BBK
Built-In Media	Tool
Color	Yellow
Customer Reviews	3.9 3.9 out of 5 stars (62)
Global Trade Identification Number	00750377777905
Item Type Name	CPS LS790B Leak-Seeker Refrigerant Leak Detector
Item Weight	3.2 ounces
Manufacturer	CPS Products
Mfr Part Number	LS-790B
Model Number	LS790B
Number of Items	1
Power Source	Corded Electric
Product Style	simple
Sensor Type	Ion Pump
UPC	750377777905

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198474 Ft

Duties & taxes included

In stock

Sold byAmazon HungaryDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Hungary.

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