Best Enviro-Safe in 2026

Concentrated

No Pump Down

For use in heat pumps, split and mini split systems, packaged units, and micro-channel coils

Concentrated

No Pump Down

For use in heat pumps, split and mini split systems, packaged units, and micro-channel coils

【Combustible Gas Leak Detector】The TopTes PT199 is suitable for LPG, methane, ethane, propane, butane, natural gas, coal gas, gas fuel, liquefied natural gas, etc., and it will exactly pinpoint a leak, reducing the risk of gas explosion and keeping your family and property safe

【Visual & Audio Gas Alarm】The gas detector employs both visual alarm and audible alarm as fast as 0.5 seconds of detection. When the bar graph increases and the detector beeps, you know gas has been detected. The alarm increases with the amount of gas, and the LCD screen will turn red when the gas concentration is high

【Batteries Included & Easy to Use】The TopTes PT199 comes with 2x AAA Alkaline Batteries, so you will be able to set the detector up and have it ready as soon as you receive it. The system warm-up time is about 30 seconds. The low battery indicator will engage when battery voltage is below 2.4V. Automatic power off after 5 minutes without operation or gas detection

NSF certified for use around food

Non-Corrosive

Detects Micro Leaks down to 0.65 oz/year

【Combustible Gas Leak Detector】 TOPTES PT177 is a useful little tool that helps every household who has gas appliances to quickly and easily pinpoint leakage of combustible gas including LPG, methane, ethane, propane, butane, natural gas, coal gas, gas fuel, liquefied natural gas, etc. It will save a ton of time and potentially reduce energy bills

【Easy to Use, Visual & Audible Alarm】 All you have to do is load the provided batteries, let PT177 gas detector finish its 30-second automatic calibration process, and then point near where you suspect the leak to be (hold it a couple of centimeters away). PT177 detects gasses and alarms almost immediately within 0.5 to 3 seconds. Five red LEDs (visual) and 75dB audible alerts that increase with gas concentration

【Compact Design】 Pocket-sized with a pocket clip that allows you to carry it in your shirt pocket. The included storage bag makes the natural gas detector easy to store. It is an excellent tool for RV-ers, DIY-ers, homeowners with gas appliances, etc. It's very convenient and perfect for regular safety checks

【Pass SAE-2791/ SAE-2913 standards, A2L compatible Refrigerant Leak Detector】Sensitivity Down to 0.1oz./year (3g/year). Instantly responding to all halogenated gases (including chlorine, fluorine, bromine): R290, R600a etc.][CFCs: R12, R11, R500 etc.] [HCFCs: R22, R123, R124 etc.] [HFCs: R32, R134a, R404a, R125 etc.] [HFOs: R454B, R1234YF etc.] [ Blends: AZ-50, HP62, R410a etc.]

【Infrared Absorption Spectroscopy, Anti-Interference Specifically for Automotive/ AC Maintenance】10-Year Sensor Life, 8-Hours continuous working after a charge, Efficiently putting an end to false trigger against cooling liquid, carb cleaner, transmission oil, engine oil, motor vehicle brake fluid etc. with a Large LCD Screen, new color graphic display, seen in bright sunlight or low light. Easily find leak dye with “Clip-On” UV LED at a glance.

【PEAK Function】 Record the Max. level of leaks. Mute the beep if you’re annoyed about it. High/ Medium/ Low of sensitivity to reach the best detection. Excellent sensitivity down to 0.14 oz/ year. 20 inch Stainless Steel Expansion Pipe Additionally with an Extended 12 inch.

High-precision Heated Diode Sensor: It triggers on R11/R22/R404a/R410a/R600a/R1234yf and all halogenated refrigerants including CFCs, HFCs, HCFCs, HCs, HFOs and blends.

4 Simple Buttons: It allows to fast reset, mute, power on/off, adjust sensitivity and makes LED screen visually display the leakage level and device status.

Fast Response: Warms up in the 30s and respond in 3s; 6-grade adjustable sensitivity with maximum sensitivity 0.11oz/yr.

✔ HIGH PERFORMANCE - The SMK-1 version 2.0 outputs lots of smoke! It's compact, powerful, and all quality components have been UPGRADED+ in version 2.0. All units come with our brand new ALP HIGH YIELD Ceramic Smoke System guaranteed to produce more smoke than all competition and last forever (smoke coil has our lifetime warranty).

✔ DIAGNOSE ALL TYPES OF LEAKS - Consistently smoke test EVAP / Vacuum / exhaust / and more at a fraction of the cost.

✔ PRECISE AND SAFE - Engineered and tested 100% safe for all vehicles & GUARANTEED TO WORK! High Smoke output detects micro leaks down to .001 inches.

Concentrated

No Pump Down

For use in heat pumps, split and mini split systems, packaged units, and micro-channel coils

Heated Diode Refrigerant Leak Detector

Sensitivity better than 0.03 oz/yr (1g/a)

Bright, LCD screen with easy-to-see bar graphs and numeric readings

🔬 ACCURATE: Professional and Accurate OXYGEN (O2) gas detector, 0-30.0% with 0.1% resolution. USA NIST Calibration.

🌷 DETECT: Electrochemical cell sensor with accuracy: ≤±5% F.S. and response time: T<30s. Zero and span calibration options. Comes factory calibrated.

🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached. Alarm digital time stamp and logging.

The Ultrasonic Leak Detector can quick and simple location ultrasonic caused by air, liquid, dust leak. It’s able to detect leakage on tyre and also detects ultrasound as well. Use ergonomics, it is easy and fast for user to use with simple key operation mode and comfortable hand feeling.

The Air Leak Detector is a very useful device to locate leak either under pressure or vacuum. The head phone produced a very distinct sound on the area where the leak is coming from. Using the transmitter, it will transmit sound from an enclosed area and can pinpoint the gaps or opening on the roof using the receiver.

The Ultrasonic Leak Finder can detect the air or liquid leakage by detecting ultrasonic caused by high pressor leakage.It can trace the detector around outside of the screen, windows and door seals to locate the leak. It uses the advanced ultrasonic sensing technique and features small size, light weight, reliable detection, easy use and utility.

DIGITAL SIGNAL MICRO-PROCESSOR provides precise and instant responses

SENSITIVITY LEVEL ADJUSTMENT with 6 levels of sensitivity and 15 levels of detection

STATE OF THE ART FEATURES including visual leak level indicator, keypad control, mute and reset function

Concentrated

No Pump Down

For use in heat pumps, split and mini split systems, packaged units, and micro-channel coils

Sensitivity of 0.15 oz./year (4 g/year)

Detects all CFCs, HCFCs, HFCs, and HFOs

Proven heated diode sensor for reliable leak checking

Stop roof or ceiling leak damage and protect your people, equipment and inventory with the original leak diverter tarp

Long, rectangular tarp shape catches leaks along cracks or pipes

Easily keep rain and snow from storming inside. Whether condensation and ice, or heavy rain from a high-wind hurricane, this solution will quickly protect your team and what you've built

⚛️ ACCURATE: OXYGEN (O2) gas detector + PUMP (0.5LPM 500cc/min), 0-30.0% with 0.1% resolution. USA NIST traceability calibration. Turn ON and GO.

🚄 DETECT: Electrochemical cell sensor with accuracy: ≤±5% F.S. and response time: T<30s. Zero and span calibration options. Comes factory calibrated.

🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached. Alarm digital time stamp and logging.

You Will Receive: 2 pieces of UV light kits (AAA batteries are not included), 4 pairs of leak detector glasses and 2 pieces of black bags, enough quantity and nice combination to meet your testing, replacing, storing and sharing needs

14 LED Lights: each leak detector light adopts 14 LED lights, with strong light, reliable and stable, practical and effective, serving you for a long time; The flashlight shell is made of aluminium, easy to grasp

Protect Your Eyes: the UV protective glasses are mainly made of quality PC, with smooth surfaces, comfortable to use, reliable and lasting, not easy to deform or break, which can be applied or stored for a long time, to provide you with more convenience, and keep your eyes from UV rays

【WIDELY APPLICATION】The electronic stethoscopes is a very useful diagnostic test tool which can reduce downtime and maintenance related costs of the tested equipments.Air/Vacuum Leaks;Gas and Liquid Turbulence;Electrical Discharge;Mechanical Wear;Sound Generation.A practical and portable tool for any pressure and vacuum system.

【THE RECEIVER PERFORMANCE】allsun pro ultrasonic leak is mechanics electronic stethoscope, the receiver is sensitive to ultrasonic in the frequency range of 36k to 44kHz Audio feedback and a 10 bar LED indicator for visual intensity of signal, 33mm directional receiver port, 3.5mm stereo jack and a rotary on/off volume control switch.

【ACCURATE & RELIABLE】Pro Ultrasonic Leak Detector Kit,the 30cm air probe serves to extend reach or to facilitate isolating a leak among multiple suspect areas.This Ultrasonic Diagnostic Tool is easy to carry and operate, and its detection result is accurate and reliable.

【Upgraded Version of WJL-6000】WJL-6000Pro halogen leak detector is the upgraded version of the classic WJL-6000 with higher sensitivity. New upgraded LCD screen displays sensitivity level and refrigerant gas leakage level, even multiple alarm functions.

【Higher Sensitivity】7.9 inch flexible sensing tip with with higher sensitivity(up to 0.11oz/yr.) that compared with WJL-6000(0.21oz/yr), It can continuously work for 50 hours with 4*AAA batteries power supplied.

【Multi-Alarms】The audible and visual display alarms in the leakage tester can easily help you to locate where the leakage is. Once leaking gas is detected, the beep frequency will increase. The more gas leaked, the quickly the buzzer beeps, at the same time, the LCD screen displays the leakage level.

【WATER LEAK DETECTOR】Detect pipe leakage by amplifying the sound, with headphones, you can adjust the sound level. It has strong practicability and is suitable for water leakage detection of various construction pipelines. Penetrability: Pipe/ Cement Pipe/ Steel Pipe.

【HIGH SENSITIVITY】Dual probe design, including circular probe and needle probe, can be switched according to the site conditions. Probe Sensitivity: -10D db- -70D db. Maximum Audio Amplification Factor: 20000X.

【PREMIUM QUALITY】Tube Water Leak Detector is made of high-quality ABS and metal, wear-resistant and durable, not easy to damage. Built‑in 3.7V lithium battery, which can be recharged repeatedly, which is convenient to use.

【Quick Leak Location】Ultrasonic leak detector adopts advanced ultrasonic sensing technology, which is specially used to detect the leakage of gas, liquid, etc. Air leak detector can quickly and accurately find gas or liquid leaks in various pressure or vacuum systems. Ultrasonic leak detector can be used to detect the tightness of cabins, car cockpits, refrigerators, containers, etc., and can also be used to track and locate leaks in doors and windows, pipes, tires, and refrigeration equipment.

【High Sensitivity Sensor & Adjustable Sensitivity】Ultrasonic leak detector adopts advanced high-quality sensor with high sensitivity, which can respond quickly and detect tiny leaks, providing you with stable and high-precision detection. The sensitivity of the ultrasonic air leak detector can be manually adjusted according to the detection environment. Adjust to the required sensitivity, the measurement accuracy will be higher (Frequency Response: 40KHz ± 2KHz).

【Sound & Light Dual Alarm Prompt】When ultrasonic waves are detected, the LCD indicator of the ultrasonic leak detector will light up, and ultrasonic leak detector will issue rapid ticking sounds to remind you at the same time. Our ultrasonic leak detector comes with a headset that quickly captures the location of leaks with even the tiniest of sounds. The closer the probe is to the leak, the faster the frequency and the higher the pitch of the ticking sound in the headset.

Stop roof or ceiling leak damage and protect your people, equipment and inventory with the original leak diverter tarp

Long, rectangular tarp shape catches leaks along cracks or pipes

Easily keep rain and snow from storming inside. Whether condensation and ice, or heavy rain from a high-wind hurricane, this solution will quickly protect your team and what you've built

Design to locate leaks in pressure and vacuum systems

Quick and simple o ultrasonic caused by air, liquid, dust leak

2 led lights; red: leak; green: power

【Higher Sensitivity, Longer Probe】14 inches flexible probe shaft with 3 alternative sensor tips. 7 adjustable sensitivities with the max sensitivity of 0.11oz/yr.

【18 levels of Alarm Indications】The Electronic Refrigerant Leak Detector features 18 alarm levels from low to high to help you home in on a leak. The alarm level will increase as the leak is being approached.

【Fast Response】Once the power button is pressed, the detector will be ready to use.Response in 3 seconds; Warm up in 6 seconds. Reset in 2 seconds. Powered by: 2 C Alkaline batteries(included)

【Detect All Refrigerants】Refrigerant leak detector can detect all halogen refrigerants, including CFCS (R12, R11, R500, R503), HCFCs (R22, R123, R124, R502), HFCs (R134a, R404a, R125),detect other mixtures AZ-50, HP62, MP39, etc.It detects refrigerant leakage in air conditioning and refrigeration systems,detect ethylene oxide gas leak in medical equipment,detect SF-6 in high-voltage circuit breakers,detect cleaning agents for dry cleaning equipment,detect halon gas leakage in fire extinguishers.

【High Sensitivity & High Precision & High Stability】R134A R410A R22 refrigerant leak detector uses a high-sensitivity sensor, and a built-in mechanical pump pumps air for sampling, providing a positive airflow for the probe sensor, so it can fast respond and detect tiny refrigerant gas. Freon leak detector is controlled by a microprocessor with advanced digital signal processing capabilities to provide you with high accuracy of detection, bringing you high stability and reliability.

【Adjustable 6 Levels (32X) Sensitivity】The leak detector hvac provides a 32-fold sensitivity increase from 1 to 6 levels. Sensitivity can be adjusted with the sensitivity button, doubling or halving each press. The higher the sensitivity, the faster the sound frequency. Adjust to the required sensitivity according to the detection environment, the measurement accuracy of the halogen gas leak detector hvac will be higher.

1.【Detects All Halogen Refrigerants】The professional refrigerant leak detector can detect all CFCs, HFCs and HCFCs refrigerants, such as R12, R11, R500, R503, R22, R123, R124, R502, R134a, R404a, R125, etc. Detect Blends such as AZ-50, HP62, MP39, etc; Detect Ethylene Oxide gas leaks; Detect SF-6 in high-voltage circuit breakers; Detect most gases containing Chlorine, Fluorine and Bromine; Detect cleaning agents used in dry cleaning applications; Detect Halon gases in fire extinguishing systems.

2.【Power Indication and Battery Test Function】(1) After the leak detector is turned on, the leftmost LED is green, orange or red, indicating the battery power. (2) The battery test function is activated by pressing the battery test key. When pressed, the LED light will display the real voltage in red. The color position of the red LED light corresponds to the voltage. Except for the first LED light can display green, orange or red, the rest of the LED lights only display red.

3.【Automatic Circuit/Reset Function】Upon initial power on, the refrigerant leak detector automatically sets itself to ignore the level of refrigerant present at the tip. Or press the reset button, and the LED lights will light up red for one second, which will make the circuit ignore the level of refrigerant present at the tip. Only a level, or concentration, greater than this will cause an alarm. Note: If the probe is turned on where there is already a leak, the leak will not be detected.