YSI 400423 TruLine Nitrate Electrode FS

Includes ISE with replaceable sensor module and refillable reference, fill solution, ISA, and high (1000 mg/L) standard.

Dual channel meter for dual measurement of pH, mV (ORP) or ISE, AutoRead function improves repeatability.

Two channel input for pH, ORP, optical-based DO/BOD, or conductivity, large, easy to read color display.

Three channel input for pH, ORP, Optical-Based DO/BOD, or conductivity, antibacterial keypad, large, easy to read color display.