INFICON 724-701-G2 is the OEM CO₂ (R744) replacement sensor for the D-TEK Stratus® and D-TEK® 3 leak detectors. If your readings are drifting or response is sluggish, a quick sensor swap gets you back to high-sensitivity CO₂ leak finding with fewer call-backs. Too easy.

Key features & trade benefits

• CO₂-specific infrared sensor (R744) — pinpoint CO₂ leaks accurately on ref rigs, display cases and heat pumps.
• High sensitivity (≈ 0.07 oz/yr | 2 g/yr, EN14624) — pick up small leaks faster and cut diagnostic time.
• Approx. 1,000-hour sensor life — long run-time between swaps; plan maintenance, reduce surprises.
• Drop-in cartridge for D-TEK Stratus & D-TEK 3 — field-swap in minutes; no recalibration faff.
• Genuine INFICON part — reliable performance and fit—fair dinkum OEM quality.

Why this sensor matters on real jobs

Cold room alarm going off in a supermarket on a sticky Sydney afternoon? Pop the 724-701-G2 into your Stratus, and you’re straight back to crisp, stable CO₂ response. One tech told us he swapped the cartridge on the loading dock, traced the leak at a flare, and had the case temps dropping again before knock-off. No worries.

Rounding out your kit? Check our refrigerant leak detectors to build a complete detection workflow from find → verify → fix.

Pro tip

If response feels dampened, change the sensor and filters together. After the swap, let the instrument run in fresh air for a minute before you hit the plant—response stabilises faster and you’ll avoid false positives. Handy on humid Brisbane sites where moisture can linger.

Compatibility & system info

• Compatible instruments: D-TEK Stratus® and D-TEK® 3 (CO₂ mode).
• Refrigerant: CO₂ (R744).
• Sensor type: Infrared (NDIR), CO₂-specific.

What’s included

• 1 × INFICON 724-701-G2 CO₂ Replacement Sensor module.

Specifications

Warranty & returns

Sensors are considered consumables for manufacturer warranty purposes. For store policy details, see Shipping & Returns.

Work must comply with Australian refrigerant handling rules; licensed techs only.

FAQs

Will this fit my instrument?
Yes — D-TEK Stratus® and D-TEK® 3 when used for CO₂. It’s the OEM CO₂ cartridge.

How often should I replace it?
Typical life is around 1,000 hours, but high-moisture or high-use sites may shorten that. If response slows or zero won’t stabilise, swap it.

Do I need to recalibrate after installing?
No special calibration steps — allow a brief run-in in fresh air and follow the instrument prompts.

Related products

• INFICON D-TEK Stratus Leak Detector — pair with this sensor for CO₂ jobs and switch back to standard refrigerants when needed.
• INFICON D-TEK 3 Leak Detector — flexible platform that accepts CO₂, standard and flammable sensors.
• INFICON Stratus Spare Parts Kit — keep filters and caps fresh so the new sensor performs at its best.