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Brochure/specifications in pdf format Configuration
| DESCRIPTION The SBE 18 pH Sensor uses a pressure-balanced glass-electrode /Ag/AgCl-reference pH probe to provide in-situ measurements at depths up to 1200 meters (3900 ft). The replaceable pH probe is permanently sealed and is supplied with a soaker bottle attachment that prevents the reference electrode from drying out during storage. The sensor and associated interface electronics is a modular, self-contained package that is easy to install, service, and calibrate. The SBE 18 is intended for use as an add-on auxiliary sensor for profiling CTDs (SBE 9plus CTD; SBE 19 and 19plus SEACAT; and SBE 25 SEALOGGER CTD). Power / signal interface cables and mounting hardware are available separately. The SBE 18's interface circuits buffer and offset the differential glass-electrode/reference potential to produce a high-level pH-dependent output voltage. Computation of pH in engineering units is typically done using our SEASOFT© software. Sea-Bird calibrates the pH sensor against precision buffer solutions (4, 7, 10, pH ± 0.02 pH). These calibration results are tabulated on a certificate furnished with each sensor. |
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SPECIFICATIONS pH Measurement Range: 0 - 14 pH Accuracy¹: 0.1 pH Time Response²: 1 second ¹Stated accuracy is achievable with frequent field calibrations. ²Time to reach 63% of final value following a step change in pH. Electrical/Mechanical Power required: 6 - 24 VDC, 7 mA Signal output: 0 to +5 V Materials: Anodized aluminum (6061-T6) and stainless steel Operating depth: 1200 meters (3900 ft) Weight: 0.7 kg (1.5 lbs) in air, 0.4 kg (0.8 lbs) in water ADDITIONAL INFORMATION / LINKS: Documentation -- manual, photos, technical papers, application notes, etc.
Sales Information -- options, accessories, spares, cables, mount kits, etc.
Links to Other Instruments of Interest |
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Sea-Bird Home Phone: 425-643-9866 Fax: 425-643-9954 E-mail: seabird@seabird.com
