Max. error
The maximum measurement error provided by the device, in other words, the largest deviation from the real value of the measured value that may occur during the measurement process. The smaller this indicator, the more accurate the device, the smaller the error it gives in the measurement process; on the other hand, high accuracy has a corresponding effect on cost.
Specifically, in thickness gauges, an accuracy of 10% is considered low, 5% is average, 3% is good, and less than 3% is excellent.
Continuous measurement
Support of the device of a mode of
continuous measurement.
In this mode, the user does not need to press the button every time to take measurements — the device constantly scans the space and automatically displays the measurement results on each subsequent contact with the painted surface. This format is very convenient for large-scale work — for example, for a comprehensive check of the car body.
Auto switch-off
The presence in the device of the
automatic shutdown function: the device turns off on its own if the user has not performed any actions with it for some time. The response time for this function is usually a few minutes.
Auto-off saves battery power; it is especially useful if the user forgets to turn off the instrument manually.
Display backlight
The presence of a
backlight on the display of the device. The backlight allows you to see the data on the screen even in complete darkness. It can be turned on either manually, by pressing a separate button, or automatically, when the results of the next measurement are displayed on the screen.
Built-in memory
Presence in the device of own
built — in memory. Such a memory is used to save the measurement results — this is often more convenient than writing them down manually or memorizing them. At the same time, the number of saved results in some models can reach several thousand (see "Recording (measurements)").
Operating temperature
The temperature range at which the thickness gauge can normally perform its functions. If you go beyond this range, the device may not break down immediately, but you won’t have to talk about accurate measurements. Note that you have to pay attention to this parameter mainly in cases where the device is planned to be used outdoors. So, for use in winter, it is worth making sure that the device is able to operate at
temperatures below zero, and for hot climates, it is desirable that the upper limit of the range is
+40 °C and above.
