Meet the HALO: a Bluetooth pH probe that pairs with your iPad to help you measure pH like a pro. This is a double junction, refillable glass pH probe with a built-in temperature sensor. It pairs with its companion app at the press of a button. The activity indicator light tells you when the device is working. You can use the device to tag sample data and get real-time data.
The Hanna Lab App turns your tablet into a pH lab. It handles calibration, measurement, data logging, graphing and data sharing. The device can alert you if measurement threshold is exceeded. Sets you back $195.