Pressure (D)

RBR CTD instruments use piezoresistive pressure (depth) sensors.

The sensor is protected by a clear plastic guard. During moored deployments with sediment in the environment, orient it downwards to reduce debris collecting on the housing.
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Fig. 1.    Pressure sensor
Parameter Value

Range1

20 / 50 / 100 / 200 / 500 / 750dbar (plastic)
1000 / 2000 / 4000 / 6000/ 10000dbar (Ti)

Initial accuracy

±0.05% full scale

Resolution

<0.001% full scale

Typical stability

±0.05% full scale / year

Time constant

<10ms

1 Recommended depth for wave measurements is less than 50m.