SeaFET V2 Ocean pH sensor

Product Line Shipping Hold Update

Sea-Bird Scientific has been working with Honeywell to re-start the production of the sensing elements needed for the Shallow SeaFET/SeapHOx (gel-based DuraFET).

Quality of incoming pH units has not yet met the requirements for use in the Shallow SeaFET/SeapHOx but is improving.

We will resume service of Shallow SeaFETs and SeapHOxes as our first priority for the available inventory for DuraFETs and will start accepting quote requests for new units once qualification has been confirmed.

Other pH product lines that include the Deep SeapHOx V2, HydroCAT-EP V2, SBE 18, and SBE 27 are not impacted by this validation process with Honeywell and remain serviceable and active for new production orders.

Accurate long-term pH measurements
The SeaFET™ V2 is the next generation pH sensor, upgraded from the original SeaFET™. The sensing element is an ion sensitive field effect transistor (ISFET). This class of device has been used for pH sensing in industrial processes, food processing, clinical analysis and environmental monitoring. The advantages of the ISFET include robustness, stability and precision that make it suitable for ocean pH measurement at low pressure. The ISFET potential is measured against two separate reference electrodes: one bearing a liquid junction (internal reference) and a solid state reference electrode (external reference), providing the user with the ability to assess instrument performance and ultimately achieve a greater understanding of the state of acid/base equilibria in seawater.

The SeaFET™ V2 Ocean pH sensor has been used extensively for:
• ocean acidification research
• coral reef research
• coastal marine biology
• environmental monitoring.

• Flexible operation
• Internal data storage and batteries
• Multiple applications
• Calibrated using natural seawater