Conductivity measurement in green hydrogen production is challenging due to the measurement accuracy required in high purity water. The conductivity of the water supplied to the electrolysis stack must be carefully controlled to less than approximately 0.05 µS/cm to prevent damage to the stack. This high purity water is generated by passing DI water through a two-stage filter before it is collected in the oxygen separator tank. If the conductivity of the water being fed to the electrolysis stack is above the target threshold, it is routed to a recirculation filter for correction or blown-down. The Rosemount™ 400 Conductivity Sensor with 0.01 cell constant provides good accuracy in high purity water down to 0.01 µS/cm.
The Rosemount 1058 Dual Channel Transmitter provides confident liquid analysis measurement in a wide range of industrial, municipal and commercial applications. It is a 4-wire powered device that provides multi-parameter liquid analysis for digital and analog sensors, including inputs from pH/ORP sensors, ISE, flow, current, conductivity sensors (contacting and toroidal), turbidity sensors and amperometric sensors (dissolved oxygen, chlorine and ozone).
The Rosemount 1056 Transmitter offers single or dual sensor input with an unrestricted choice of dual measurements, reducing the cost per loop and saving panel space. This multi-parameter liquid analysis transmitter offers a wide range of measurement choices, including differential conductivity, dual oxygen and many other combinations supporting most industrial, commercial and municipal applications. The modular design of the transmitter allows signal input boards to be field replaced making configuration changes easy.