Product as described I didn't realize that the screen doesn't support a backlight. Which helps to read the display. The end uses are mixes and mixes for hydroponic tanks. The meter reads RO at 0 microsiemens. Soften reading WW 860ppm. Waiting for a calibration solution to see if the meter is worth keeping. Bought as "used" from Revain. Will be updated if necessary.
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