The connector on the end of the hose has to match the air line already in the bay, and this is where an inflator most often turns out to be unusable. Euro, clip-on, hold-on and open-ended fittings are all in use, they look broadly similar, and none of them connect to each other.
Once the connector is right, form decides how the inflator is held and read. An in-line gauge sits between the hose and the chuck and is read at eye level. A pistol grip puts the gauge and the trigger in one hand at the valve. Neither is better; they suit different positions at the wheel. PCL hold Airforce analogue inflators alongside the Draper bodies with the same connector question applying to both.
Pressure range and accuracy are stated on the instrument. Range runs to 100psi and 7 bar on the general gauges, and accuracy is quoted on the lines that carry it rather than being assumed from the dial size.
Where there is no air line at all, foot pumps in single and double cylinder forms with a gauge cover a wheel without any supply, and 12V and 20V units run off a vehicle or a battery platform. Mobile inflation carts bring a supply to the forecourt. Send a photo of your existing coupling to 07754288583 on WhatsApp. The A100 compressor at 10 bar sits on the leaf for a bay that needs a supply as well as an inflator.