Bluetooth
Support for
Bluetooth technology. This technology is mainly used to communicate with a control device — a smartphone, tablet, laptop or other similar equipment; usually, a special application needs to be installed on this device. Bluetooth functionality varies, but is most commonly used to transfer measurement data to an external device and to remotely control device settings.
Display
The type of display provided in the design of the device.
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Monochrome. Single-colour display — for example, in the form of dark icons on a light background or luminous icons on a black background. Such displays are noticeably cheaper than colour displays and consume less power, but they have more modest functionality, are not as convenient and are not well suited for advanced functions. Therefore, this option is mainly used in devices synchronized via Bluetooth (see above): in them, the main control is carried out through the screen of a smartphone/tablet, and its own monochrome display plays a supporting role.
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Colour. The colour displays provide a rich image, well suited to instruments with a wide range of settings (as most modern nitrate testers are). They cost more than monochrome ones, but this difference is almost imperceptible against the background of the total price of the devices.
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Colour sensor. Displays similar to those used in modern smartphones and tablets. Such a display slightly increases the cost of the device, but this is offset by ease of operation: a wide variety of controls can be displayed on the touch screen, it is more visual and intuitive than the classic control panel with buttons. This option is quite popular in modern nitrate testers and similar instruments.
Operating time
Approximate operating time of the device on one set of batteries or battery charge (see "Power"). If we are talking about replaceable batteries, then note that their quality and capacity can be different, but the characteristics usually indicate the maximum battery life when using advanced batteries. In fact, this means that the actual operating time in such a device may be less than the claimed one, depending on the quality of the installed elements.
