Air Conditioning Charge Equipment: what Claude and GPT would buy
Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.
Claude and GPT choose the same brand, Robinair, but not the same product
In Automotive, Claude and GPT choose the same brand in 60 of 112 categories.
Claude Opus 5.5 · October 27, 2026
Robinair 34788NI
$9,178.45 at Test Equipment Depot on Price shown on the store's page that day, excluding shipping; it may have changed.
An SAE J2788 recover, recycle and recharge machine meters the R-134a charge by weight automatically, which is the accurate and compliant way to fill a mobile A/C system.
Not for: DIYers recharging one car, and anyone servicing R-1234yf vehicles, which need a J2843 machine.
GPT 6.1 Sol · November 10, 2026
Robinair 34288NI
Automates R-134a recovery, recycling, evacuation, and recharging, making it a practical choice for a professional automotive service bay.
Not for: R-1234yf systems or occasional DIY use.
Which one fits you
R-1234yf vehicles
Robinair AC1234-4
A dedicated R-1234yf recover, recycle and recharge machine built to the SAE J2843 standard that newer vehicles require.
Not for: Shops that only see older R-134a cars.
charging by weight with a manifold
Fieldpiece SRS3
A wireless refrigerant scale that lets you charge to the exact factory weight from a manifold setup without a full charging station.
Not for: Anyone charging only from small cans with a single-hose gauge.
Check before you buy
Specifications · 5 items
- Voltage
- 125 V AC, 60 Hz
- Weight
- 230 lb (103 kg)
- Dimensions
- 48.5 x 24 x 36 in
- Recovery efficiency
- 98.5%
- Hose length
- 9 ft (2.75 m)
Taken from the pages of Test Equipment Depot and Wrenchers on November 11, 2026, not checked.
Where to find Robinair 34788NI
- Test Equipment Depot
- JB Tools
- Wrenchers
Also seen on Amazon.
Shops seen in search results on November 11, 2026. A shop missing here may sell it too. Nothing was checked by a person.
Brands that matter
- Robinair: The dominant shop brand for mobile A/C charging stations.
- Mastercool: Broad range of automotive charging hoses, couplers and scales.
- Fieldpiece: Wireless scales and digital tools that pair with its manifolds.
What to avoid
- Can-top recharge hoses with only a low-side gauge used to fill an empty or unknown system
- Sealer-laced refrigerant cans, which can contaminate shop machines
- Generic couplers of unknown quality on R-1234yf ports
Questions
Can I convert an R-134a machine for R-1234yf?
No. R-1234yf needs equipment certified for it, with its own fittings and flammable-refrigerant safeguards.