APPLICATION NOTE NO. 84
Using Instruments with Druck Pressure Sensors in Muddy or Biologically Productive Environments
This Application Note applies to Sea-Bird instruments with Druck pressure sensors, for moored applications or other long deployments that meet either of the following conditions:
Note: Photo is for an SBE 37-SM. Pressure port details are similar for all instruments included in this application note.
|At Sea-Bird, a pressure port plug with a small (0.042-inch diameter)
vent hole in the center is inserted in the pressure sensor port. The vent
hole allows hydrostatic pressure to be transmitted to the pressure sensor
inside the instrument.
|Sea-Bird has developed a high-head pressure port plug for deployment in
muddy and/or biologically productive environments. The high-head plug
extends beyond the surface of the instrument end cap, and has four
horizontal vent holes connecting internally to a vertical vent hole.
To purchase the high-head pressure port plug, Part Number 233186, contact Sea-Bird.
Note: Until several years ago, Sea-Bird filled the pressure port with silicon oil at the factory. For Druck pressure sensors, we determined that this was unnecessary, and no longer do so. It is not necessary to refill the oil in the field. However, for Paine or Paroscientific Digiquartz pressure sensors, the pressure port does need to be refilled with silicon oil. Please contact Sea-Bird with the serial number of your instrument if you are unsure of the type of pressure sensor installed in your instrument.
Sea-Bird Home Phone: (+1) 425-643-9866 Skype: sea-bird-electronics E-mail: firstname.lastname@example.org