The EZO™ Adapter, allows you to connect a 5 pin EZO™ Sensor to a 6 pin socket. The EZO™ Adapter works with the following EZO devices: EZO-O2 (O2 Sensor) EZO-CO2 (CO2 Sensor) EZO-RGB (Color Sensor) EZO-PMP (Peristaltic Pump) EZO-PRS...