YSI 400435 TruLine Silver ISA

Includes ISE with refillable reference, fill solution, ISA, and high silver 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.