Fieldpiece DRX3 Refrigerant & Combustible Gas Leak Detector — Lightweight HVAC tool, Heated‑Diode Sensor, Field‑Replaceable

The Fieldpiece DRX3 is a lightweight, rugged leak detector that finds A3, A2L and A1 refrigerants plus combustible gases using a heated-diode sensor and clear audio/visual alerts.

Built for HVAC technicians who need a single tool to pick up modern low‑GWP refrigerants and common combustible gases, the DRX3 pairs portability with accuracy. It uses a field‑replaceable heated diode sensor that responds to a wide range of refrigerants and heating gases, offers selectable sensitivity settings, and communicates leak strength through multiple LED and tone patterns. The unit ships with the sensor installed and a blow‑molded case for jobsite protection.

How does the DRX3 detect both refrigerants and combustible gases?

The DRX3 relies on a heated diode sensor tuned to react to the electrical changes caused by trace gas molecules. That sensor is replaceable in the field so you can keep the tool operational without downtime. Multiple sensitivity levels and zeroing modes help you calibrate detection for tight spaces or noisy environments.

• Heated diode sensor picks up A3, A2L, A1 refrigerants and common combustible gases
• Field‑replaceable sensor for quick maintenance on site
• Auto and manual zero modes to remove background interference
• High/medium/low sensitivity selection for coarse or pinpoint work

What refrigerants and gases will it identify on the job?

The DRX3 is designed to detect a broad set of working fluids used in HVACR and heating systems. It recognizes hydrocarbon and fluorinated refrigerants, blends, and tracer gases, as well as combustible heating fuels. This makes it useful across retrofit, service, and troubleshooting tasks.

• Compatible with HC, HFC, HCFC, CFC and HFO refrigerants
• Detects A3 (flammable hydrocarbon), A2L (mildly flammable low‑GWP), and A1 (non‑flame) types
• Works with H2/N2 tracer gas mixtures and common heating gases
• Effective on refrigerant blends and mixed‑charge systems

How does the DRX3 communicate leak severity and help locate the source?

Leak intensity is relayed through a combination of LEDs and audible tones that change with gas concentration, enabling a quick sweep and precise pinpointing. The detector’s ergonomic wand and sensitivity control let you follow small plumes without missing subtleties. Rugged construction tolerates jobsite conditions while remaining light enough for extended use.

• Multi‑level visual indicators show increasing leak strength
• Adjustable audio tones and volume for noisy environments
• Lightweight, portable design reduces fatigue during long inspections
• Blow‑molded case included for transport and storage protection

Can the DRX3 connect with apps or fit into a technician’s existing workflow?

The DRX3 is part of Fieldpiece’s Job Link System ecosystem, enabling data sharing and job documentation when paired with compatible apps. Long‑life batteries and field serviceable parts minimize downtime so the detector integrates smoothly into daily routes and preventive maintenance programs.

• Job Link System compatibility for logging and job records
• Long‑life, replaceable batteries keep the tool working between charges
• Field‑replaceable sensor reduces equipment downtime
• Compact profile fits in tool bags and vehicle compartments

Who is this for: The Fieldpiece DRX3 is aimed at HVACR technicians, service contractors, and facilities teams who need a single, portable leak detector that handles modern refrigerants—including A2L and A3 classes—and ordinary combustible heating gases. It’s a practical choice for field service, retrofits, system troubleshooting, and preventive maintenance when reliable detection, fast location, and minimal tool downtime are priorities.