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Shorestation Seawater Sensor Information

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Instrument Type: Sea-Bird Electronics SBE 16+ SEACAT

Installed: 21 March 2003

Description: Self contained conductivity and temperature sensor, with strain gauge pressure sensor. Pumped during sampling with SBE 5T submersible pump. 

Location: Water sampled in sump at Laboratory seawater intake, in the pumphouse at the shore of Horseshoe Cove.
Latitude 38° 18’ 58.2” N
Longitude 123° 04’ 10.2” W

Seabird 16Specifications:

Temperature
Range: -5 to +35 °C
Resolution: 0.0001 °C
Accuracy: 0.005 °C

Conductivity
Range: 0 to 9 S/m
Resolution: 0.00005 S/m
Accuracy: 0.0005 S/m

Pressure
Range: 0 to 44 m
Resolution: 0.002 % of full scale range
Accuracy: 0.1% of full scale range

Acquisition Settings:
Sample interval = 5 minutes
Measurements per sample = 20 (averaged)
Pumped during sample

Instrument Type: Sea-Bird Electronics SBE 45 MicroTSG Thermosalinograph

Installed: 1 January 2001 - March 2003

Description: An ultra-precision Wein Bridge oscillator to generate a frequency output in response to changes in conductivity and a bridge circuit using an ultra-stable aged thermistor and Vishay precision reference resistor for seawater temperature

Location: Water sampled at Laboratory seawater intake
Latitude 38° 18' 59.46" N
Longitude 123° 04' 15.34" W

Seabird SBE45Specifications:

Temperature
Range: -5 to +35 °C
Resolution: 0.0001 °C
Accuracy: 0.002 °C

Conductivity
Range: 0 to 7 S/m (0 to 70 mS/cm)
Resolution: 0.00001 S/m
Accuracy: 0.0003 S/m

Salinity
Resolution: 0.0002 PSU
Accuracy: 0.005 PSU 

Instrument Type: Sea-Bird Electronics SBE 4 Conductivity Meter

Installed: 15 April 1988 - 2001

Description: A Wein Bridge oscillator to generate a frequency output in response to changes in conductivity

Location: Water sampled at Laboratory seawater intake
Latitude 38° 18' 59.46" N
Longitude 123° 04' 15.34" W

Specifications:

Instrument Type: Platinum Resistance Thermometer

Conductivity
Range: 0 to 7 S/m (0 to 70 mS/cm)
Resolution: 0.00001 S/m
Accuracy: 0.003 S/m

Salinity
Resolution: 0.0002 PSU
Accuracy: 0.005 PSU

Resolution: 0.01 °C

Accuracy: 0.05 °C

Special Note: Until December 1989, the sensor was positioned in a large sump. Water flowed frequently but not continuously through the sensor. During periods of non-flow, salinity readings may have been more variable than during periods of flow.