The Bluelab® pH Meter is an easy to use unit that will give you quick and accurate pH readings of solutions in your grow area. This unit comes supplied with standard Bluelab pH probe, solution sachets and batteries. With a range of 0.0 - 14.0 pH and an accuracy of +/- 0.1 pH readings can be taken anywhere and help you manage your crops daily nutrients better. Simply place the pH probe into the solution and the reading will be displayed on the screen. This portable meter also features an auto turn off, low battery indicator and an over/under range indicator. It is easy to calibrate by using the push buttons on the meter and fresh Bluelab® calibration solutions. With the 5 year Bluelab guarantee, this unit is reliable and built to last.