PH Test Kit (PEN or Wireless)

[klim]

Hi, What is the cheapest and good PH test Pen in the market, where can we get it...If possible, let us the brand, how long you have used it and how you grade (1 to 10).

Appreciate the advice.

[amteo]

Using Hanna pHep pen for more than a year. So far no problems. Last calibration was in January. Test PH 7 and 10, no need for any adjustment. Can't remember the cost, but think it was around $50.