VIVOHOME Refrigerant Leak Detector with LED Light — 7.9-inch Bendable Probe, Adjustable Sensitivity

The VIVOHOME HVAC Refrigerant Freon Leak Detector is a portable electronic sensor that finds halogenated refrigerant leaks quickly using an adjustable sensitivity probe and built-in dual-color LED light.

This compact leak detector is designed for HVAC technicians, automotive mechanics, and homeowners who need a fast way to locate refrigerant escapes in air conditioning, refrigeration, and heat pump systems. It recognizes a broad range of halogenated gases — including common HFCs, HFOs, CFCs and HCFCs — and combines a flexible probe, audible alarms, and visual indicators so you can work in tight or dimly lit spaces. The unit includes a carrying bag for transport and operates on AAA batteries for field portability.

How does the detector identify different refrigerants?

The sensor is calibrated to detect halogenated refrigerants rather than measuring specific chemical signatures. It reacts to gas concentration changes and signals leaks by increasing alarm speed and light flashes as the gas level rises. This makes it suitable for locating leaks across a variety of refrigerants used in modern systems.

• Detects HFCs such as R134a, R410a and R32
• Recognizes HFOs like R1234yf
• Also responds to legacy CFCs and HCFCs
• Alarm becomes faster and louder as concentration increases

What features help find leaks in tight or dark spaces?

The detector includes a 7.9-inch bendable probe that lets you reach seals, joints and tight engine bays. A dual-color LED provides white light for visibility and ultraviolet illumination to reveal fluorescent leak dyes. Together these features reduce guesswork when tracing leak paths.

• Flexible probe maneuvers into cramped areas and around piping
• White work light improves visibility under housings and panels
• UV light highlights fluorescent dye in service-added tracers
• Carrying bag stores probe and unit for on-site jobs

How sensitive and reliable is the alarm system?

The unit offers seven sensitivity levels and auto-adjusts to changing gas concentrations for rapid response. Normal low-level detections produce intermittent beeps and flashes; nearer or larger leaks trigger rapid beeps (up to 10 per second) and a louder 85 dB alarm so you can hear alerts over workshop noise. Note that condensation or liquid contact can cause false readings, so follow operation tips to keep results accurate.

• Seven adjustable sensitivity settings for fine-tuning detection
• Auto-adjust behavior delivers maximum 0.21 oz/yr accuracy in ideal conditions
• Audible alarm shifts from steady beeps to rapid 85 dB alerts
• Avoid damp surfaces and liquid contact to prevent false alarms

What power, setup, and maintenance should I expect?

The detector runs on four AAA batteries (not included) and provides long field endurance when charged fresh. It requires a brief warm-up in fresh air to establish a baseline and then reacts to leaks within seconds. LED indicators show operational readiness and battery status so you know when to replace cells for consistent accuracy.

• Requires 4 × AAA batteries (not included); green LED means ready
• Orange LED indicates batteries should be replaced for best performance
• Preheat in fresh air for about 6 seconds; responds to leaks in ~3 seconds
• Keep probe dry and avoid testing on damp surfaces

Who is this for? The VIVOHOME HVAC Refrigerant Freon Leak Detector suits HVAC service professionals, automotive AC technicians and experienced DIYers who need a portable, easy-to-use tool for locating halogen-based refrigerant leaks. It’s built for field use, offering flexibility, visual assistance, and adjustable sensitivity to handle a range of systems and environments without relying on complex calibration or external power.