Michael, if you do not unearth the information you need, glucometers are cheap, open one up and measure - I'm sure you can get hold of a decent Amp (micro) meter that measures accurately.

The limits are deliberately set to keep the range that is physiologically relevant but I expect that accuracy will also diminish way beyond 600 as well as below 20mg/dl (the common limit). Conventional glucose oxidase-based Beckmann glucometer gives reasonably accurate reading down to 10mg/dl and up to 850mg/dl, recommended limits are 40 and 400 respectively.

The most flexible meter I had was designed by a scientist at our own institute, who retired a decade ago. Nice thing about his device was that you adjusted the slope (relationship parameters between current and the amount of glucose) curve at will by using a standard glucose solution. For example, if you use a 400mg/dl solution as standard, you could measure up to about 600 mg/dl. If you use 800 mg/dl standard to calibrate, you could read well over 1000mg/dl; likewise, one could increase sensitivity in low range by using 200 or even 100mg/dl calibrator. If you are contemplating putting together something like that, I will be very interested.

come to think of it, I need to invite some bioengineering students to our meeting and see if they are interested in a project like that.  ;)

Best,

Alam

This is difficult to answer, considering the fact that different manufacturers use different enzyme systems; hence, the potentials that are recordable will vary.

Use some 1...100 K variable resistors to build a dummy cell and study the response curve of your device. The device is providing a constant potential of about 0.6 V.

I suggest that the measuring range is close to 0.01...1 mA and is also limited by the internal software.