Amplified pH sensor for the YSI 556 handheld, built for high-static environments, very cold water, long cable runs, or long-term field deployments where the connector might see moisture. User-replaceable without tools.

Used with: YSI 556 (requires the guard extension kit and a 2-port ProSeries/556 cable)

One-year sensor warranty.

556 Manual | 556 Spec Sheet