This adapter is used for connecting conventional lab electrode that has BNC and phono jack connectors to a sensor head and any of the WQ-300 series meter. It is compatible with the following:
3-in-1 / combination pH electrodes and 300PH-2 / 300PH-5 sensor head
3-in-1 / combination ORP electrodes and 300-O-2 ORP sensor head
Combination ion selective electrodes (ISEs) and 300-I-2 ion sensor head