SENSYX SFD200 HVAC Refrigerant Leak Detector — Rechargeable Halogen Sniffer with Color PPM Display

The SENSYX SFD200 is a rechargeable, handheld refrigerant leak detector that uses a high-sensitivity metal-oxide sensor and live ppm readout to locate halogen-based refrigerant leaks fast and accurately.

Designed for HVAC technicians, refrigeration pros and serious DIYers, the SENSYX SFD200 detects the full family of halogenated refrigerants (CFCs, HCFCs, HFCs and many HFO blends) and shows concentration on a color LCD so you can pinpoint leaks rather than guessing from intermittent beeps. Built-in USB-C charging, selectable sensitivity levels, and a long-life lithium battery make it practical for busy service routes and on-site troubleshooting.

How quickly will the detector find small AC or fridge leaks?

The SENSYX SFD200 offers two sensitivity settings so you can sweep broadly, then slow down to close in on the source. With the high-sensitivity mode and the recommended probe technique, it can reveal very small leaks that otherwise only show as slow pressure loss.

• Selectable High and Low sensitivity to adapt to the job.
• Recommended sweep speed: about 1 inch (25 mm) per second for reliable detection.
• Position probe ~1/4 inch from joints or fittings to isolate leaks.
• Color LCD shows live ppm plus a bar graph for precise localization.

What refrigerants does this sniffer detect and what does it not cover?

The SFD200 is tuned to respond across the halogenated refrigerant family, including common CFC, HCFC, HFC and many HFO blends used in home, commercial and automotive systems. It does not detect non-halogen gases such as natural gas, LPG or pure propane—choose a model specified for combustible gases if you need those.

• Detects R11, R12, R22, R134a, R404a, R410a, R1234yf and many more.
• Effective for residential and commercial HVAC, refrigeration, and automotive AC.
• For natural gas or LPG, SENSYX offers alternate models (e.g., SFD201).
• Sensor type: metal-oxide semiconductor tuned for halogenated compounds.

How long will the battery last, and how do I charge it on the road?

The detector includes a 2500 mAh built-in lithium battery that supports long service days and recharges from any USB-C power source. A USB-C cable is included so you can recharge from vehicle adapters, power banks or shop chargers between calls.

• Up to 24 hours continuous operation per full charge under typical conditions.
• Charges from any USB-C supply—cable included in the box.
• No disposable batteries required, reducing downtime and waste.
• Low-battery indications on the LCD so you can plan recharging.

How should I use the detector for the most reliable results?

Metal-oxide sensors require an initial warm-up to reach peak sensitivity; run the unit in clean air for several hours when new or after storage. When inspecting, start in low-sensitivity or clean air, move slowly (about 1 inch per second), and keep fans or drafts off so ambient airflow doesn’t mask the leak plume.

• Power on away from suspected leak and let the baseline settle first.
• Move probe slowly—roughly 25 mm per second—keeping ~1/4 inch from fittings.
• Use high sensitivity after a broad sweep to home in on the exact joint.
• Mute the buzzer when you need to watch the numeric ppm readout silently.

Who is this for? The SENSYX SFD200 suits HVAC technicians, refrigeration service teams, fleet maintenance shops and informed DIY homeowners who service their own systems. It’s intended for locating halogen refrigerant leaks quickly and repeatedly on residential and commercial equipment; it’s a diagnostic tool, not a replacement for continuous area gas alarms or equipment-specific safety instrumentation.