pH/PPM Meter Measuring 1000PPM and 7.00pH calibration solutions

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pH/PPM Meter Measuring 1000PPM and 7.00pH calibration solutions

Images of homebrew ppm/ph meter with serial and usb for loggin and setup. More details of the project itself can be found here. (clicky!)
This is measuring ppm and pH calibration solutions, u calibrate it to 7.0pH and the 4.0pH then for ppm u first use totally dry probe to set 000 and then 1000ppm calibration solution to set the scale. All this can be done thru the buttons on the front panel (with cute text scrolling effects!) or can be done via serial/usb. Setting via serial/usb you are able to use different value solutions and it calculates everything internally ohhh ahhh.