Description
The INFICON INF-721-204-G1 is a high-performance refrigerant and CO₂ leak detector from the D-TEK 3 line, supplied with an integrated CO₂ infrared sensor. Designed for HVACR professionals and refrigeration technicians, it helps detect leaks in CO₂ systems, carbonated beverage lines, cold rooms, and refrigeration circuits that use R-744. The tool features a field-replaceable sensor and battery, ergonomic design, and strong sensitivity to help pinpoint leaks quickly and reliably.
FEATURES:
- Equipped with CO₂ sensor built in, tailored for detecting leaks of R-744 (carbon dioxide) systems.
- Infrared sensing technology: offers stable, non-degrading sensitivity over time.
- Field-replaceable sensor and battery to minimize downtime on the job.
- Fast warm-up (45 to 90 seconds) so you’re ready quickly.
- Four sensitivity levels (Low / Medium / High / “Super”) for adapting to different leak sizes and environments.
- Manual & automatic zero modes for cancelling ambient background gas and improving detection accuracy.
- Capable of detecting other refrigerants as well (when using sensor modules) — the D-TEK 3 line allows sensor interchangeability.
- Rugged design with durable housing and a user-friendly interface tailored for field use.
- Rechargeable lithium-ion battery with ~10 hours of runtime; supports operation while charging via micro-USB.
- Certifications: EN14624:2020, A2L certified, CE, UKCA
INCLUDES:
INFICON D-TEK 3 CO₂ leak detector (model 721-204-G1), Infrared CO₂ sensor (pre-installed) , Lithium-ion rechargeable batter, Spare filters, AC wall charger (USB), Carrying / storage case, 2-year warranty
SPECIFICATIONS:
| Parameter | Value / Range |
|---|---|
| Model | INF-721-204-G1 (D-TEK 3, CO₂ sensor) |
| Sensor Type | Infrared CO₂ sensor (R-744) |
| Probe Length | ~17 in (43 cm) standard probe |
| Sensitivity (CO₂ / R-744) | 0.07 oz/yr (≈ 2 g/year) |
| Warm-Up Time | 45 to 90 seconds |
| Operating Temperature | –4 to 122 °F (–20 to +50 °C) |
| Storage Temperature | –4 to 140 °F (–20 to +60 °C) |
| Charging Temperature | 32 to 113 °F (0 to 45 °C) |
| Battery | Rechargeable lithium-ion |
| Battery Life | ~10 hours operation |
| Charging Interface | Micro USB (can operate while charging) |
| Certifications / Standards | EN14624:2020, A2L certified, CE, UKCA |
| Weight | 440 g (0.97 lb) |
| Warranty | 2-year |



