D-TEK® 3
Upgrade your toolbox with this accurate and reliable leak detector.

Stop Leaking Profits
D-TEK 3 builds on the proven performance of D-TEK leak detectors with added features to help you get your job done faster. An easy-to-change sensor, quick charge lithium ion battery, and a new ergonomic design make D-TEK 3 a versatile tool for everyday RAC maintenance and repair. Plus, a new optional CO2 sensor gives you two instruments in one. Upgrade your toolbox with this accurate and reliable leak detector.
Always have the right sensor for the job
D-TEK 3 is designed with versatility in mind. Quickly and easily switch to one of the optional sensors to look for refrigerant, CO2, or even flammable refrigerant leaks!

Features
- Low, Medium, High, and Super sensitivity settings
- Automatic and manual zero modes
- Rugged carrying case included
- Detects all CFCs, HCFCs, HFCs, HFOs, and blends (including A2Ls)
- Compatible with optional sensors for CO2 or flammable refrigerants
- Optional extra-long probe for hard-to-reach areas
- Two year replacement warranty
Advantages
All new, redesigned infrared sensor
- Longest sensor life in the industry
- Easy field replacement
New lithium ion battery
- Long life (~10 hours)
- Quick charge capability
- Easy field replacement
Designed for ergonomic comfort
Get even more out of your leak detector with the Leak Detection Pro Kit.
Designed to help you leak check like a pro, the new Leak Detection Pro Kit (PN 724-712-G1) comes with a needle probe, rubber I-Tip, brush I-Tip XL, spare filters and extra rubber refills. Use the needle probe to diagnose problems in unique applications like VRF and other systems that have hard-to-access refrigerant lines, and even check for leaks in insulated areas without removing insulation. For windy or drafty conditions, attach I-Tip or I-Tip XL to the end of the probe – these attachments work to contain the refrigerant sample and will help you find leaks in any environment. Compatible with D-TEK Pro, D-TEK Stratus, D-TEK 3, and D-TEK Select.

Typical applications
- Industrial AC/Refrigeration
- Residential AC/Refrigeration
Specifications
| Includes | D-TEK 3 Infrared sensor Lithium ion battery Spare filters AC wall charger Carrying case | |
| Compatible refrigerants | ||
| Refrigerant sensor | Refrigerant sensor | R22, R32, R134a, R404a, R407c, R410a, R422b, R448a, R449a, R452a, R452b, R507 (AZ50), R1234yf, ammonia, SF6, HFE and more |
| CO2 sensor | CO2 sensor | R744 (CO2) |
| Flammable refrigerant sensor | Flammable refrigerant sensor | R290, R600a, R441a
|
| Sensitivity per EN14624 | ||
| R744 (CO2) | R744 (CO2) | 2 g/a (0.07 oz./yr)1 |
| R1234yf | R1234yf | 0.5 g/a (0.02 oz./yr) |
| Ammonia | Ammonia | 3 g/a (0.1 oz./yr) |
| R290 | R290 | 5 g/a (0.2 oz./yr)2 |
| R134a | R134a | 1 g/a (0.04 oz./yr)
|
| Power source | Lithium ion battery (rechargeable) Micro USB (can operate while charging) | |
| Certifications | CE EN14624:2020 A2L Certified | |
1Requires 724-701-G2 CO2 Sensor 2Requires 724-701-G3 Flammable Refrigerant Sensor | ||
| 721-202-G1 | D-TEK 3, North America |
| 721-204-G1 | D-TEK 3 with CO2 sensor, North America |
| 721-202-G11 | D-TEK 3, Europe |
| 721-204-G11 | D-TEK 3 (includes CO2 sensor only), Euro |
| 721-202-CN41 | D-TEK 3, Asia |
| 712-707-G1 | Filter cartridges, set of 5 |
| 721-605-G1 | Car Charger |
| 721-606-G1 | Wall Charger |
| 721-607-G1 | Earbuds |
| 703-080-G10 | TEK-Check R134a Reference Leak |
| 721-702-G1 | Battery |
| 721-610-G1 | Charging Cradle |
| 721-604-G1 | Battery/Charging Cradle Bundle |
| 724-701-G1 | Refrigerant Sensor (Detects CFCs, HCFCs, HFCs, HFOs, and blends (including A2Ls)) |
| 724-701-G2 | CO2 Sensor |
| 724-701-G3 | Flammable Refrigerant Sensor (Detects R290, R600a, and R441a) |
| 724-712-G1 | Leak Detection Pro Kit |
| 724-701-G1 | Refrigerant Sensor (Detects CFCs, HCFCs, HFCs, HFOs, and blends (including A2Ls)) |
| 724-701-G2 | CO2 Sensor |
| 712-707-G1 | Filter cartridges, set of 5 |
| 712-707-G1 | Filter cartridges, set of 5 |
| 724-703-G1 | Replacement probe |
| 721-611-G1 | Extra-long probe |
| 721-605-G1 | Car charger |
| 721-606-G1 | Wall charger |
| 721-700-G1 | Carrying case, D-TEK 3 |
| 724-705-G1 | D-TEK 3/Stratus replacement battery door |
| 712-705-G1 | Replacement probe cap |
| 724-703-G1 | Replacement probe |
Downloads
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