Best a/c Freon Gas Leak Detector in 2025
Updated on July 2025
#1
Recommended
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- Adjustable sensitivity with three modes for accurate refrigerant leak detection, pinpointing leaks as low as 3g/yr (0.1oz/yr) with a flexible gooseneck for hard-to-reach areas.
- Three alert options including sound (90dB), visual cues, and vibration, with a quick mute feature for convenience and enhanced low-light visibility for precise detection.
- Dual display modes on a vibrant TFT screen provide real-time refrigerant concentration levels and trend tracking, with adjustable brightness and energy-saving auto-off.
- Ergonomic design with a rechargeable 2000mAh battery for over 8 hours of use, featuring robust construction that is waterproof, explosion-proof, and dustproof for reliable performance in tough conditions.
- Broad detection capabilities for various refrigerants, including HCFs, HCFCs, CFCs, PFCs, HFOs, and HCs, ensuring versatility for different applications.
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- Adjustable sensitivity with three modes for accurate refrigerant leak detection, pinpointing leaks as low as 3g/yr (0.1oz/yr) with a flexible gooseneck for hard-to-reach areas.
- Three alert options including sound (90dB), visual cues, and vibration, with a quick mute feature for convenience and enhanced low-light visibility for precise detection.
- Dual display modes on a vibrant TFT screen provide real-time refrigerant concentration levels and trend tracking, with adjustable brightness and energy-saving auto-off.
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#2
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21% Off
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- Heated diode sensor provides enhanced accuracy for all halogenated refrigerants compared to traditional sensors.
- First leak detector equipped with a TFT screen, offering clear readings for sensitivity levels, leakage alerts, and battery status.
- Features adjustable sensitivity with high, medium, and low settings, with maximum sensitivity reaching 0.1 oz/year.
- Two front buttons enable quick adjustments to sensitivity levels and muting of the buzzer for straightforward operation.
- Capable of detecting all halogenated gases, including CFCs, HFCs, HCFCs, HCs, HFOs, and various refrigerant blends, with a response time of 1 second.
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- Heated diode sensor provides enhanced accuracy for all halogenated refrigerants compared to traditional sensors.
- First leak detector equipped with a TFT screen, offering clear readings for sensitivity levels, leakage alerts, and battery status.
- Features adjustable sensitivity with high, medium, and low settings, with maximum sensitivity reaching 0.1 oz/year.
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#3
26% Off
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- High sensitivity with three adjustable modes, achieving a maximum detection of 0.14 oz/year, featuring a 16-inch probe for accessing tight spaces.
- Audible and visual alerts display leak level, with a mute function available.
- User-friendly with a reset function to prevent false positives, peak value recording, and a rechargeable battery offering 6 hours of use.
- Detects a wide range of halogenated gases including CFCs, HCFCs, HFCs, HFOs, and hydrocarbons.
- Color graphic display visualizes gas detection levels with a changing bar graph to indicate proximity to leak.
- Durable and oil-resistant design suitable for fieldwork, ensuring reliability in tough conditions.
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- High sensitivity with three adjustable modes, achieving a maximum detection of 0.14 oz/year, featuring a 16-inch probe for accessing tight spaces.
- Audible and visual alerts display leak level, with a mute function available.
- User-friendly with a reset function to prevent false positives, peak value recording, and a rechargeable battery offering 6 hours of use.
- Detects a wide range of halogenated gases including CFCs, HCFCs, HFCs, HFOs, and hydrocarbons.
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#4
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- Cordless operation with rechargeable lithium battery and USB-C charging cable.
- Highly sensitive Japan-made heat dioxide semiconductor sensor for reliable leak detection.
- Adjustable sensitivity settings for customizable detection levels.
- Detects a broad range of refrigerants across various HVAC systems.
- Large color LCD display for clear visibility of leak locations and levels.
- Meets UL1484 safety standards for reliability.
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- Cordless operation with rechargeable lithium battery and USB-C charging cable.
- Highly sensitive Japan-made heat dioxide semiconductor sensor for reliable leak detection.
- Adjustable sensitivity settings for customizable detection levels.
- Detects a broad range of refrigerants across various HVAC systems.
- Large color LCD display for clear visibility of leak locations and levels.
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#5
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- Detects all halogenated refrigerants, including R22, R134A, R404A, R410A, R1234YF, and various blends.
- Features adjustable sensitivity with a maximum detection capability of 0.21oz/yr for precise leak assessments.
- Includes audible and visual indicators for gas leaks, plus dual battery status indicators.
- Offers quick response time of 3 seconds, with a 6-second warm-up period for efficient operation.
- Flexible 7.9-inch probe allows access to hard-to-reach areas for comprehensive leak detection.
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- Detects all halogenated refrigerants, including R22, R134A, R404A, R410A, R1234YF, and various blends.
- Features adjustable sensitivity with a maximum detection capability of 0.21oz/yr for precise leak assessments.
- Includes audible and visual indicators for gas leaks, plus dual battery status indicators.
- Offers quick response time of 3 seconds, with a 6-second warm-up period for efficient operation.
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#6
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- Updated corona sensor with improved analogue circuit for reliable refrigerant detection.
- Fast triggers for R11, R22, R134A, R404A, R410A, and various halogenated refrigerants.
- Flexible 8.26-inch probe for accessing tight spaces during leak detection.
- Audible and visual alarms for leak status, along with dual-color battery indicators.
- Technical support available 24/7 through email and phone.
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- Updated corona sensor with improved analogue circuit for reliable refrigerant detection.
- Fast triggers for R11, R22, R134A, R404A, R410A, and various halogenated refrigerants.
- Flexible 8.26-inch probe for accessing tight spaces during leak detection.
- Audible and visual alarms for leak status, along with dual-color battery indicators.
- Technical support available 24/7 through email and phone.
#7
7% Off
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- Contains 1.5 oz of refrigerant and 1.5 oz of additives
- Repairs metal leaks in evaporators, condensers, and compressors
- Seals rubber leaks in O-rings and gaskets
- Includes red dye for detecting larger leaks
- Compatible with R-134a cans featuring a self-sealing valve
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- Contains 1.5 oz of refrigerant and 1.5 oz of additives
- Repairs metal leaks in evaporators, condensers, and compressors
- Seals rubber leaks in O-rings and gaskets
- Includes red dye for detecting larger leaks
- Compatible with R-134a cans featuring a self-sealing valve
#8
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- 7 adjustable sensitivity levels for targeted detection, with a maximum sensitivity of 0.21 oz/yr; automatically adapts to varying gas concentrations
- Equipped with audible alerts that beep upon detecting gas leaks, and a visual LED indicator that signals battery health and presence of leaks
- Fast detection with a 6-second preheat time and a 3-second response; features a flexible 7.9-inch probe for accessing hard-to-reach areas
- Simple to operate: requires 4 AAA batteries (not included), adjusts sensitivity, and indicates leaks with distinct sound and light signals
- Compatible with multiple refrigerants including R11, R22, R134a, and more; ideal for air conditioning and refrigeration system leak detection
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- 7 adjustable sensitivity levels for targeted detection, with a maximum sensitivity of 0.21 oz/yr; automatically adapts to varying gas concentrations
- Equipped with audible alerts that beep upon detecting gas leaks, and a visual LED indicator that signals battery health and presence of leaks
- Fast detection with a 6-second preheat time and a 3-second response; features a flexible 7.9-inch probe for accessing hard-to-reach areas
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#9
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- Traditional coronal sensor featuring a low-energy CPU for improved trigger stability and speed across various refrigerants, including R11, R22, R134A, R404a, R410A, and all halogenated variants.
- 3-second response time with a 6-second warm-up period.
- 7 adjustable sensitivity levels, with the highest sensitivity detecting 0.11 oz/yr.
- Flexible 14-inch stainless steel probe equipped with two alternative sensor tips.
- Modular sensor design for easy maintenance, powered by 2 included C Alkaline batteries, with 24/7 US technician support available via email and phone.
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- Traditional coronal sensor featuring a low-energy CPU for improved trigger stability and speed across various refrigerants, including R11, R22, R134A, R404a, R410A, and all halogenated variants.
- 3-second response time with a 6-second warm-up period.
- 7 adjustable sensitivity levels, with the highest sensitivity detecting 0.11 oz/yr.
- Flexible 14-inch stainless steel probe equipped with two alternative sensor tips.
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#10
20% Off
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- Measuring gas leaks in both PPM for sensitive detection and LEL% for safety of combustible gases.
- Features an audible and visual alarm that changes to a siren when a leak is detected; includes a MUTE function for the buzzer.
- Durable all-metal probe that is dirt-proof and wear-resistant, suitable for repair engineers.
- 1800 mAh rechargeable battery provides over 20 hours of use; a Type-C charging cable is required but not included.
- Responds to combustible gases in 2 seconds and accurately identifies refrigerants in 10 seconds for enhanced safety.
- Detects a wide range of refrigerants and combustible gases, including various CFCs, HCFCs, HFCs, and hydrocarbons.
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- Measuring gas leaks in both PPM for sensitive detection and LEL% for safety of combustible gases.
- Features an audible and visual alarm that changes to a siren when a leak is detected; includes a MUTE function for the buzzer.
- Durable all-metal probe that is dirt-proof and wear-resistant, suitable for repair engineers.
- 1800 mAh rechargeable battery provides over 20 hours of use; a Type-C charging cable is required but not included.
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