Print version Configuration options & accessories
The SBE 29 pressure sensor, used on our SBE 25 Sealogger CTD (no longer in production as of 2012), is a modular sensor consisting of a mechanical strain-gauge pressure transducer with thermistor temperature compensation. The SBE 29 measures absolute pressure in one of seven full scale pressure ranges from 20 to 7000 meters depth. The sensor elements and their interface electronics are modular and self-contained, providing easy installation, service, and calibration.
The SBE 29 interface electronics provide a pressure-dependent output voltage (+5 to -5) and a temperature-compensation voltage of 0 to +5 VDC (30K ohm thermistor at 25° C). Temperature-corrected pressure in engineering units [Pnum] is computed using the following equation:
Pnum =Vp * 819 - (TC * T/1024)
Each sensor is calibrated over its full scale range using a dead weight tester. Calibration results are tabulated on a certificate furnished with each sensor.
Measurement Range: 20/100/350/1000/2000/3500/7000 meters (expressed in meters of deployment depth capability)
Accuracy: ± 0.1% of full scale range
Typical Stability (per year): 0.05% of full scale range
Power Required: +10 and -10 VDC at 15 mA
Weight: 0.7 kg (1.6 lbs) in air; 0.3 kg (0.7 lbs) in water
ADDITIONAL INFORMATION / LINKS:
Documentation -- manual, photos, technical papers, application notes, etc.
Sales Information -- options, accessories, cables, mount kits, spares, etc.
Links to Other Instruments of Interest
Specifications are subject to change without notice.
Sea-Bird Home Phone: (+1) 425-643-9866 Skype: sea-bird-electronics E-mail: firstname.lastname@example.org