I know resistance varies as a function of time, so therefore Coulombs makes sense. There is a large "ground" are on my strips which is probably part od the auto turn-on. The advertisement says it does double testing, Not sure what that means.
Plenty of info when you search for "glucose meter application note"
Google has a contact lens based system.
Some of the insulin pump manufactures have a continuous glucose monitoring system that monitors fluid beneath the skin. It needs calibration after every insert. Your not supposed to rely on it without confirmation. There is wireless communication to the glucose meter, the sensor and the pump so it can render alerts.
It would be nice to have a device that works like a pulse oximiter.
The device I use needs no coding anymore. They figured out how to make the strips use the default coding.
Fortunately my strips have zero cost. Most of the meter manufacturers will replace glucose monitor for free. If you can attend an event sponsored by a glucose manufacturer, they will likely give the meters away free.
Mom uses the drum based meter. Because of severe arthritis inserting small strips would be difficult.
I have the ability to "Tag" readings. Unfortunately, you can't ignore them. Sometimes if you don;t was your hands you can get an abnormally high reading. Reukts from multiple meters can be read into a PC.
I have about 6 meters for one strip and 1 for another. Mom has two meters plus a spare and one for anpother type of strip. I used to flip between two and mom flips between two. We both have the same "other" strip.
Both of us had to briefly change (her - almost) because the insurance would not cover the meter. In her case, they don't have the lancets that are integral to her meter. (detachable).
I love the Multiclix (now Fastclix) 6 lancet drum device. The needle is so small that it doesn't even leave a mark on my fingertips.
So, at most, you only have to buy one meter. Getting another as a spare for free requires some sweet talking or going to a seminar.
You either need two meters or glucose control solutions.