Pololu QTRX-HD-07A Reflectance Sensor Array: 7-Channel; 4mm Pitch; Analog [Discontinued] _RPI_CASE_AUDIO It can be applied to

It can be applied to domestic water

Inputs: 3 channels – R/C mode

See the Raspberry Pi documentation for more about the default GPIO states

Plug is 110 US-style and can only be used in 110V countries

Pololu QTRX-HD-07A Reflectance Sensor Array: 7-Channel; 4mm Pitch; Analog [Discontinued] _RPI_CASE_AUDIO It can be applied toThis Pololu IR LED phototransistor pair is great for precisely identifying changes in reflectance (like line detection). It operates from 2. 9 V to 5. 5 V and offers dimmable brightness control independent of the supply voltage. In general, the closer the object, the higher the contrast between light and dark readings, but high reflectance objects are generally detectable out to around 40 mm. This version features a high performance, low current QTRX