Leak Detection Tools

Select based on the medium (air, refrigerant, fuel, water), detection sensitivity needed, and access constraints; for general HVAC and refrigerant leaks use electronic refrigerant detectors, for compressed air and gas use ultrasonic detectors, and for fluids or large leaks use dye kits or pressure decay testers

Look for adjustable sensitivity, low false-positive rates, rechargeable or long-life batteries, a clear calibration method, and rugged construction or IP ratings for industrial environments

Entry-level handheld detectors and dye kits are commonly available under $50; mid-range electronic and ultrasonic detectors typically fall in the $50–$300 range, while specialized industrial instruments cost more depending on features and accuracy

Some electronic detectors are tuned for specific gases (e.g., HFC/HFO refrigerants) while ultrasonic detectors detect the sound of escaping gas or liquid independent of type; dye and pressure-based methods work for many fluids but not for gas detection

Follow the manufacturer's schedule for calibration or bump testing, keep sensors and probes clean, store the unit in a dry, temperature-stable place, and replace consumables (filters, sensor elements) as recommended to retain accuracy

Use proper personal protective equipment, ensure good ventilation when checking flammable or toxic gases, isolate pressurized systems before testing with pressure or dye methods, and follow lockout/tagout procedures for industrial equipment

Common helpful accessories include flexible probe extensions, replacement sensor tips, calibration gas or test leak kits, UV lamps for dye inspection, and carrying cases to protect sensitive instruments