Best refrigerant leak detector for HVAC techs (A2L-ready)

A leak detector earns its place in the bag when it gets you from “the charge is low” to this fitting, right here. Buy for that last few inches of the search, not just the smallest number on the box.

Choose Fieldpiece DR82 for daily infrared work. Pick DR58 if you prefer heated-diode sensing, Elitech ILD-200 for infrared sensing with a ten-year sensor, or INFICON D-TEK Stratus when finding the refrigerant cloud is half the battle. All four have maker support for A2L refrigerants; the table below keeps the sensitivity test conditions attached to the numbers.

Quick picks for the leak-finding bag

• Best infrared for daily service: Fieldpiece DR82. Long sensor life, a lighted probe and a clear display for the tech who sweeps coils and fittings all week.
• Best A2L-ready heated diode: Fieldpiece DR58. Absolute-concentration sensing, manual or automatic zero, and a long working day between charges.
• Best long sensor life: Elitech ILD-200. A maker-rated ten-year infrared sensor, peak marking and a rechargeable battery.
• Best for finding the area, then pinpointing: INFICON D-TEK Stratus. Cloud Hunting’s ppm display leads you toward the gas-rich area; Pinpoint mode takes over at the likely leak.

Complete A2L refrigerant training and follow the equipment’s service procedures; AHRI’s training resources are a useful starting point.

Compare the sensor, not just the headline sensitivity

Detector	Sensor / sensitivity	A2L support	Sensor life / replacement	Battery
Fieldpiece DR82	Infrared; 0.03 oz/yr stationary, 0.1 oz/yr in motion	Maker marks A2L compatible	10 years typical; replacement cost not published on reviewed page	10 hours typical, backlight off; rechargeable lithium-ion
Fieldpiece DR58	Heated diode; 0.03 oz/yr stationary, 0.1 oz/yr in motion	Maker marks A2L compatible	300 hours typical; RHD1 sensor, maker price not published	18 hours typical, backlight off; rechargeable lithium-ion
Elitech ILD-200	Infrared; 0.14 oz/yr in maker technical table	Product page names R-32 and R-454B	10 years in maker table; replacement cost not published	3.7 V, 3,000 mAh lithium; six hours continuous work
INFICON D-TEK Stratus	Infrared; US sheet: 0.03 oz/yr on R134a; web table: 0.04 oz/yr on R134a	A2L certified; US sheet names R32 and R454a/b	Up to 2,000 hours; replaceable 724-701-G1 sensor, maker price not published	About eight hours Cloud Hunting / ten hours Pinpoint; replaceable lithium-ion

Specification sources: DR82, DR58, ILD-200 product page and its maker technical table, Stratus US product sheet and Stratus web specifications, checked 2026-10-23. INFICON’s two R134a figures differ; choose Stratus for its search modes rather than that paper difference.

Those oz/yr figures describe a detector’s sensitivity under the maker’s stated conditions. The bar graph helps you find the source; it does not turn a sweep into a measurement of how much refrigerant this system loses each year.

Fieldpiece DR82: the daily-service infrared pick

The DR82 is our starting point for a busy service bag. Its infrared sensor has a typical ten-year life, and Fieldpiece says it avoids triggers from oil and moisture. The lighted tip, audible alarm and numerical indicator give you several ways to follow the response in a dark or noisy equipment space.

Keep the wand moving: this sensor responds to a change in concentration. Sweep the suspected joint, move away, then return to narrow the source. The IP54 body and typical ten-hour battery life with the backlight off suit repeated calls. The internal battery is non-replaceable; a typical recharge takes six hours (DR82 specifications and sensor explanation).

Good to know: the stationary 0.03 oz/yr specification becomes 0.1 oz/yr in motion. Keep that distinction when comparing it with another detector’s headline.

Fieldpiece DR58: heated diode with a long shift in it

Choose the DR58 when you like a detector that keeps responding while the probe stays at the leak. Heated-diode sensing reads absolute concentration, rather than the concentration change used by the DR82. You get the same useful mix of a lighted tip, audible feedback, numeric display and manual or automatic zero.

Fieldpiece lists 300 hours of typical sensor life and the RHD1 replacement sensor. Its rechargeable, non-replaceable lithium-ion battery is rated for 18 hours with the backlight off, with a typical six-hour charge. The maker explicitly marks it A2L compatible and specifies an IP54 body (DR58 specifications).

Good to know: heated-diode sensitivity declines with sensor age. Put sensor condition on the maintenance list alongside the probe filters.

Elitech ILD-200: a ten-year infrared sensor

The ILD-200 is the straightforward infrared shortlist for a small shop: rechargeable power, adjustable sensitivity, peak marking and a screen that keeps the signal in view. Its product page explicitly names R-32 and R-454B. The maker’s technical table specifies a ten-year sensor, 0.14 oz/yr sensitivity and six hours of continuous work from its 3,000 mAh lithium battery.

Elitech shows a manufacturer regular price of $221 for the ILD-200, checked 2026-10-23 (maker product page). It puts infrared sensing, peak marking and a six-hour battery into another tech’s service bag.

Good to know: this is the original ILD-200. The ILD-200 MAX is a different model; keep its specifications and accessories separate.

INFICON D-TEK Stratus: find the cloud, then the fitting

Stratus is the pick for the call where you need help finding the general area before working the joints. Cloud Hunting displays concentration in ppm; switch to Pinpoint when you have narrowed the area. That two-stage search is the reason to put this larger instrument on the shortlist.

The included silver refrigerant sensor covers A2Ls, including the R32 and R454 blends named in the US product sheet. INFICON lists up to 2,000 hours of sensor life, a field-replaceable sensor and battery, and roughly eight hours in Cloud Hunting or ten in Pinpoint. The CO2 and flammable-refrigerant sensors are separate options (Stratus US product sheet).

Good to know: ppm is a concentration reading. Use it to follow the cloud, then work the probe around the suspect connection to locate the source.

Electronic, bubbles and UV: give each a job

Start with the electronic detector to narrow the search. Move methodically around the suspected coil, valves and connections instead of chasing one loud beep across the cabinet. Once a fitting becomes the suspect, make the next pass smaller and repeatable.

Use bubble solution on an accessible suspect joint. A visible growing bubble gives the customer and your follow-up tech a clear location. It is especially useful once the electronic sweep has reduced the search area.

Use UV dye when the equipment permits it and the job suits a return inspection. The dye travels with the oil and shows under UV light where it escapes. It is a different workflow from sweeping a fitting now. INFICON’s guide to electronic, soap-bubble and UV methods explains those roles.

Infrared and heated diode are the electronic technologies in this shortlist. An ultrasonic detector listens for escaping-gas sound instead of using those refrigerant sensors; it is a separate tool choice. Build the core bag around the refrigerants and jobs you service, then add another method for the searches it helps you finish.

Tip: Write the exact location while you are standing there: “outdoor-unit liquid-line service-valve connection” is much more useful on the next visit than “leak outside.” Add a close photo and one wider view that shows where the fitting sits.

Turn the find into a clear job record

Record the equipment, refrigerant, location, detection method and repair or return-visit plan. Keep the before/after photos together so the office can explain the work without calling the tech back down the ladder.

For the rest of the repair kit, compare vacuum pumps for residential installs.

Use Jobber to close the loop on the leak: keep the location, finding and repair photos beside the quote and service visit.

On Jobber, add the finding and photos as a note on the relevant record, then use linked notes to carry the information across the quote, job or invoice as needed. Its notes and attachments help explains the linking and customer-facing attachment options. Visit Jobber if you want the quote and service visit organized around that finding.

HCP alternative: open the job or estimate’s Attachments, select the files and choose Email or Text, then the recipient and Share. The customer receives a link to the selected files. Follow HCP’s attachment-sharing steps; put the written repair scope on the estimate or invoice.

Round out the service bag with our digital manifold and smart-probe guide, HVAC clamp-meter picks and thermal-camera comparison. Each answers a different question on the call; the job record keeps the findings together.

For the installation kit, choose a torque wrench or adapter for flare fittings, then keep the torque and leak-test records together on the job.