Pay stations are a different animal than a unit with "Count Up" For an exact purchase there is no reason for a hold other than the exact amount of the Purchase. Like a Gasoline Dispenser, Count up requires a hold because until the purchase is completed their is no way of knowing how much it will be. This is in place until the transaction is "Batched out" and processed.
I have Monex
programmed with countup timers. Wash Bays: Have them set for a $20 preauth charge. I’ve had a couple of issues and replaced 2 of the 6 readers.
Vacuums: Set for $2 charge, no countup.
Pros: tap to pay works perfectly.
Issues: After a couple of months, two separate readers the chip reader would only read older brass chip cards, not the silver colored chip cards. This is despite cleaning them on a regular basis. Really believe this is from condensation causing corrosion on the chip reader. For chip cards, 50/50 chance it lets you swipe the card. Been almost a month since I’ve had an issue