Detail YSI 559 Replacement Polarographic DO Sensor
YSI 559 Polarographic sensor for the 550A DO and 556 Multiparameter instruments.
Easy user-replaceble sensor allows for quick sensor replacements if needed. Quickly switch DO sensors without having to send in the instrument for repair or replacing the entire cable assembly. One-year sensor warranty.
Uses convenient screw-on cap membranes making membrane changes simple and easy.