HTOMT AC Oil Injector Kit — 2 oz Aluminum Injector with R1234YF & QC12 Low-Side Couplers for Precise Dosing

HTOMT AC Oil Injector Kit is a compact professional-grade tool that injects oil or fluorescent dye into automotive and HVAC low-side systems compatible with R1234YF, R134A, R22 and R12 refrigerants.

This injector kit combines a clear, laser-engraved 2 oz (60 ml) aluminum cylinder, a one-way check valve and two low-side quick couplers so you can add precise amounts of PAG/POE/mineral oil or leak-detecting dye without switching tools. It was designed for service technicians and DIYers who need accurate dosing, visual oil level checks, and adapters for newer refrigerants such as R1234YF alongside legacy refrigerants.

How does the injector connect to different A/C systems?

The HTOMT kit includes both an R1234YF low-side quick coupler and a QC12 low-side coupler, letting you attach directly to the vehicle or system low-pressure port. The 1/4-inch female threaded connector and universal fittings reduce the need for extra adapters and simplify setup.

• Includes R1234YF low-side quick coupler and QC12 quick coupler
• 1/4" female threaded connector fits common service ports
• Snap-on couplers allow tool-free connection and rapid removal

How do I measure and inject the correct oil amount?

The injector body is laser-engraved with clear graduations from 1/4 oz (7.5 ml) up to 2 oz (60 ml), making volume checks straightforward. A visual oil checker in the cylinder helps confirm existing system oil level before and after adding, so you avoid over- or under-charging the system.

• Graduated scale for precise dosing (7.5 ml to 60 ml)
• Transparent cylinder lets you observe dye or oil flow
• Threaded core on the valve lets you purge trapped gas before injection

What types of oil and dye are compatible?

This injector accepts both mineral and synthetic oils commonly used in automotive and HVAC systems, plus fluorescent leak-detection dyes. It is built to work with a variety of refrigerants, so you can use one tool across many service scenarios.

• Works with POE, PAG and mineral oils
• Compatible with fluorescent dyes for leak detection
• Suitable for R1234YF, R134A, R22, R12 and other refrigerants

How do I operate the kit safely and efficiently?

Assemble the three main parts—cylinder, check valve and quick connector—tighten clockwise, purge with the small threaded core, then attach to the low-pressure port and dispense the measured volume. Use personal protective equipment and follow refrigerant-handling safety procedures for best results.

• Tighten check valve and cylinder clockwise for leak-free seal
• Purge trapped gas via the 1/4" threaded core before dosing
• Inject required oil amount while monitoring the gauge markings

Who this is for: The HTOMT AC Oil Injector Kit is ideal for HVAC technicians, auto repair shops, fleet maintainers and knowledgeable DIYers who service refrigeration or automotive A/C systems. It’s for anyone needing a portable, accurate injector that supports modern R1234YF systems as well as legacy refrigerants, and who values clear measurement, fast low-side couplers and compatibility with oils and fluorescent dyes. The kit contains one 2 oz injector plus both R1234YF and QC12 low-side couplers, delivering a compact, versatile tool for routine maintenance and leak detection tasks.