Robinair RX1A AC Leak Detector | Find Refrigerant Leaks Fast – HVAC Shop

Robinair TIF RX-1A is a proven halogen refrigerant leak detector for HVAC/R pros who want fast, reliable pin-pointing on site. Microprocessor control, a true mechanical pump and 14″ flexible probe make it a ripper tool for split systems, fridges and ducted installs. Too easy.

Key features & trade benefits

• ≤0.25 oz/yr (≈7 g/yr) sensitivity — find tiny halogen leaks and cut diagnostic time.
• True mechanical pump + DSP — constant airflow across the sensor and 2000 checks/sec for stable, fast response. Less chasing ghosts.
• Detects all halogenated refrigerants — suitable for R410A, R134a, R22 and mixes used in AU.
• 14″ stainless probe — reach behind coils and into cabinets without drama.
• Instant response / 2-second warm-up — get on with the job; no long waiting.
• 30-hour battery life (2 × C cells) — full day service without recharging.
• SAE J1627 compliant; CE/UL — confidence your tester meets recognised standards.

Why this detector matters on real jobs

Western Sydney, arvo sun, condenser howling. You sweep the RX-1A along flare joints and braze points; the LEDs climb and the buzzer ramps near the service valve. One tweak, nitrogen pressure check, a dab of soap to confirm — and you’re back in business. She’ll be right.

Building your leak-find kit? See our Leak Detectors collection for alternatives and spares.

Pro tip

Vent the area and zero background away from the suspected leak, then work slow and steady (about 25–50 mm/s) around flare faces and braze seams. In humid Brisbane plant rooms, keep the probe moving to avoid pooling halogen near the sensor — you’ll get fewer false highs. No worries.

Compatibility & system info

• Refrigerants: Halogenated (CFC/HCFC/HFC blends) incl. R410A, R134a, R22, etc. Not intended for CO₂ (R744) or pure hydrocarbons without a suitable sensor.
• Use cases: Split & ducted A/C, commercial refrigeration, auto A/C service.
• Best practice: Verify repairs with nitrogen pressure test and/or vacuum hold after pinpointing the leak.

What’s included

• Robinair TIF RX-1A leak detector
• Carrying case
• Replacement sensing tip (spare)
• Owner’s manual

Package contents and spare tip per manufacturer documentation.

Specifications

Model	TIF RX-1A
Detection principle	Corona discharge sensor
Sensitivity	≤0.25 oz/yr (≈7 g/yr)
Probe	14″ (35.5 cm) flexible, stainless/Teflon® liner
Pump	True mechanical pump (constant airflow)
Warm-up / response	≈2 s warm-up; instantaneous response
Operating temp	0–52 °C (30–125 °F)
Power / battery life	2 × C-cell; ≈30 hours typical
Dimensions / weight	9″ × 2.25″ × 2.25″ (≈560 g)
Compliance / warranty	SAE J1627; CE/UL; 2-year warranty

Specs verified from Robinair/TIF materials.

Warranty & returns

Backed by a 2-year manufacturer warranty (see manual) and HVAC Shop’s returns policy. View Shipping & Returns.

FAQs

What gases does the RX-1A detect?
Halogenated refrigerants (CFC/HCFC/HFC). Typical: R410A, R134a, R22 and blends. Not for CO₂ (R744) or pure hydrocarbons.

Is it sensitive enough for tiny leaks?
Yes — factory sensitivity is ≤0.25 oz/yr (≈7 g/yr) with instant response when used per the manual.

Does it come with a spare tip?
Yes. The kit includes a carrying case and one replacement sensing tip.

Prefer more visual guidance?
Consider the Robinair ZX-1A heated-pentode or TIF XP-1A for tri-colour bar graphs and extra sensitivity modes.

Related products

• Step up to TIF XP-1A — more sensitivity levels and tri-colour visual scale for faster pin-pointing on tricky leaks.
• Go infrared/heated-pentode — ZX-1A offers robust performance and quick clearing with a mechanical pump.
• Add UV dye for confirmation — great for repeat visits and visual proof under UV.