Conductivity Measurement in Green Hydrogen Production
Real-time monitoring to avoid contamination
Accurate Conductivity Measurement in High Purity Water
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.
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Product Solutions
The Rosemount 400 Contacting Conductivity Sensor, with integral cable, accurately measures electrolytic conductivity in a broad range of applications from high purity water to clean cooling water. The Rosemount 400 conductivity sensor is ideal for use in clean, non-corrosive liquid having less than 20,000 µS/cm.
- Factory-measured cell constant ensures out-of-the-box accuracy and no initial calibration requirements
- Available in cell constants of 0.01, 0.1, and 1.0/cm
- Conductivity sensor designed for direct screw-in insertion into process piping using a front facing 3/4 inch MNPT fitting
Design
Cell constants: 0.01, 0.1, and 1.0/cm
Vacuum: At 1.6 in. Hg (5.2 kPa) air leakage is less than 0.005 SCFM (0.00014 m3/min)
Vacuum: At 1.6 in. Hg (5.2 kPa) air leakage is less than 0.005 SCFM (0.00014 m3/min)
Dimensions
Cable length (Model 400 only): 10 ft (3.1 m) standard; 50 ft (15.2 m) optional
Materials of Construction
Wetted Materials: Electrodes - titanium; Body - 316 stainless steel; Insulator - PEEK; O-Rings - EPDM
The Rosemount 56 Dual Channel Transmitter is a line powered device that can accept inputs from pH/ORP sensors, ion selective electrode (ISE) sensors, flow, current, conductivity (contacting and toroidal) sensors, turbidity sensors, dissolved oxygen sensors, chlorine sensors and ozone sensors.
- Retrieve calibration and measurement information by accessing the data logger via USB
- Design efficient processes by utilizing the built-in PID controller
- At a glance view of pertinent information provided by the large customizable display
Certifications/Approvals
FM: Class I, Division 2, Groups A, B, C, & D • Class Il & lll, Division 2, Groups E, F,&G • T4
Weight
Rounded up to nearest lb or nearest 0.5 kg: 3 lbs/4 lbs (1.5 kg/2.0 kg)
Measurement Range
pH sensor: 0 to 14 pH
ORP Sensor: -1500 to +1500 mV
ORP Sensor: -1500 to +1500 mV
