YSI Science pHT-G [400361] Double Junction 3-in-1 pH/Temperature Electrode w/Glass Body, Ground Joint Junction, BNC & Banana Plug Connector, 1m Cable. YSI has four different families of combination pH electrodes from which to choose, each with unique characteristics. The IDS electrodes are designed for use with the YSI MultiLab, a multiparameter digital lab instrument. IoLine, TruLine, and Science electrodes feature BNC connection and are designed for use with the YSI TruLab, although they can be connected to the MultiLab via a BNC adapter.