PHSENG intrument

HelpDesk
1

I have a question about pH sensor metadata. The Oregon shelf surface mooring has a pH sensor whose model is listed as PHSENG. The platform is Coastal Endurance: Oregon Shelf Surface Mooring: Near Surface Instrument Frame: Seawater pH B.

Here is an example: ERDDAP - Coastal Endurance: Oregon Shelf Surface Mooring: Near Surface Instrument Frame: Seawater pH B - Data Access Form

I was able to find information about other pH sensor models (PHSENA, PHSEND, etc.) on the OOI website here, but the PHSENG model is not listed. What model pH sensor is this?

2

Looks like PHSENG is a Sea-Bird Scientific SeapHOx.

I was able to pull this info from a goldcopy netCDF file attributes. Hope this helps.

{'AssetManagementRecordLastModified': '2025-06-05T15:33:58.843000',
 'AssetUniqueID': 'CGINS-PHSENG-02090',
 'Conventions': 'CF-1.6',
 'Description': 'Seawater pH: PHSEN Series G',
 'FirmwareVersion': 'Not specified.',
 'Manufacturer': 'Sea-Bird Electronics',
 'Metadata_Conventions': 'Unidata Dataset Discovery v1.0',
 'Mobile': 'False',
 'ModelNumber': 'Deep SeapHOx (350 m)',
 'Notes': 'Not specified.',
 'Owner': 'Oregon State University',
 'RemoteResources': '[]',
 'SerialNumber': '721-2090',
 'ShelfLifeExpirationDate': 'Not specified.',
 'SoftwareVersion': 'Not specified.',
 'acknowledgement': '',
 'cdm_data_type': 'Point',
 'collection_method': 'recovered_host',
 'comment': '',
 'contributor_name': '',
 'contributor_role': '',
 'creator_email': '',
 'creator_name': 'Ocean Observatories Initiative',
 'creator_url': 'http://oceanobservatories.org/',
 'date_created': '2025-06-27T03:38:29.933840',
 'date_modified': '2025-06-27T03:38:29.933842',
 'featureType': 'point',
 'feature_Type': 'point',
 'geospatial_lat_max': np.float64(44.63918),
 'geospatial_lat_min': np.float64(44.63918),
 'geospatial_lat_resolution': np.float64(0.1),
 'geospatial_lat_units': 'degrees_north',
 'geospatial_lon_max': np.float64(-124.30224),
 'geospatial_lon_min': np.float64(-124.30224),
 'geospatial_lon_resolution': np.float64(0.1),
 'geospatial_lon_units': 'degrees_east',
 'geospatial_vertical_positive': 'down',
 'geospatial_vertical_resolution': np.float64(0.1),
 'geospatial_vertical_units': 'meters',
 'history': '2025-06-27T03:38:29.933810 generated from Stream Engine',
 'id': 'CE02SHSM-RID26-06-PHSENG000-recovered_host-phsen_gh_instrument',
 'infoUrl': 'http://oceanobservatories.org/',
 'institution': 'Ocean Observatories Initiative',
 'keywords': '',
 'keywords_vocabulary': '',
 'lat': np.float64(44.63918),
 'license': '',
 'lon': np.float64(-124.30224),
 'naming_authority': 'org.oceanobservatories',
 'nodc_template_version': 'NODC_NetCDF_TimeSeries_Orthogonal_Template_v1.1',
 'node': 'RID26',
 'processing_level': 'L2',
 'project': 'Ocean Observatories Initiative',
 'publisher_email': '',
 'publisher_name': 'Ocean Observatories Initiative',
 'publisher_url': 'http://oceanobservatories.org/',
 'references': 'More information can be found at http://oceanobservatories.org/',
 'requestUUID': '813227d1-1c0c-43be-b4c5-ffce1c8f033d',
 'sensor': '06-PHSENG000',
 'source': 'CE02SHSM-RID26-06-PHSENG000-recovered_host-phsen_gh_instrument',
 'sourceUrl': 'http://oceanobservatories.org/',
 'standard_name_vocabulary': 'NetCDF Climate and Forecast (CF) Metadata Convention Standard Name Table 29',
 'stream': 'phsen_gh_instrument',
 'subsite': 'CE02SHSM',
 'summary': 'Dataset Generated by Stream Engine from Ocean Observatories Initiative',
 'time_coverage_end': '2025-05-29T19:15:14.181000',
 'time_coverage_resolution': 'P899.96S',
 'time_coverage_start': '2024-10-14T17:00:07.382000',
 'title': 'Data produced by Stream Engine version 1.20.16 for CE02SHSM-RID26-06-PHSENG000-recovered_host-phsen_gh_instrument',
 'uuid': '813227d1-1c0c-43be-b4c5-ffce1c8f033d'}
3

Thanks Ian!

Yes, the PHSEN-G and PHSEN-H are both Sea-Bird Deep SeapHOx instruments. The “G” series has a housing with a depth rating of 350 meters, and the “H” series has a 2000 meter rated housing. We’re a little behind adding that info to the website, but you can find make and model info within the downloaded file attributes (as Ian pointed out) or in the Asset Management information on the OOI data portal (e.g., OOI Data Explorer)

I’ll make a note to the website administrator that we need to add this info to the main OOI website.

Let us know if you need more info on the pH or other instruments.

Cheers,
Mike Vardaro (RCA Data Team)