Aanderaa Conductivity Sensor

Conductivity sensors from Aanderaa are compact, fully integrated sensors for measuring the electrical conductivity of seawater. Conductivity is a key parameter for in-situ measurements of several fundamental physical properties of seawater.

  • Features
  • Selection Guide
  • 문서

For seawater, the ability to conduct electrical current is mostly dependent on temperature and the amount of inorganic dissolved solids. Salinity is defined as the concentration of dissolved solids. This means that, together with temperature and depth information, a good estimate of the salinity may be determined. By using the inductive principle, stable measurement can be obtained with­out utilizing electrodes that are easily fouled and may wear out in the field.

Conductivity Sensor 3919
Conductivity/Temperature 4119
Conductivity with analog output 4120

• Smart sensor provides calibrated data directly
• Real-time integrated calculation of salinity, density and sound of speed
• Low maintenance needs
• Easy functionallity check
• 3 depth ranges, maximum 6000 meter
• Internal pressure never exceeds 1 bar therefore electronics and sensors are unaffected by sea depth
• Output format: SR10, RS-232, Analog 4119 4120 0-5V/4-20mA

Conductivity Sensor 4019

• Smart Sensor for easy integration with RDCP
• Direct readout of engineering data
• Internal pressure never exceeds 1 bar therefore electronics and sensors are unaffected by sea depth
• Rugged and Robust with low maintenance needs
• Output format Internal bus, RS-232.
• 3 depth ranges; maximum 6000 meter


Specification 4319 4019 3918 4119 4120
Shallow Water X X X X X
Intermediate Water X X X X X
Deep Water X X X X X
Used with Seaguard: on top-end plate, on string or connected via cable. Output: AiCap X
Used with RDCP on top-end plate. With full resolution. Output: Internal bus X
Used with RCM9/11, RDCP or AADI datalogger, on top-end plate. Output: SR10 X*
Used with RCM9/11, RDCP or AADI datalogger, via remote sensor cable. Output: SR10 X X
Analog output, 0-5V or 4-20mA X
RS-232 via cable with new AADI protocol** X
RS-232 via cable with old AADI protocol** X X X

*Select 4019 for RDCP use unless you want to use the temperature output. Conductivity Sensor 4019 uses an internal bus connection with full resolution (16bit). Conductivity Sensor 3919 uses SR-10 with 10 bit resolution. To obtain the same resolution with a 3919 sensor the range can be zoomed using a set-up and configuration cable (RS-232). The temperature sensor integrated in the 3919 may be used for internal calculation in the RDCP by using a patch cable for 2 channels. The 4019 only outputs Conductivity.

** Please note: All further improvement of software and calibration will be prioritized on new protocol. Limitations in the older electronic design may prevent us from including future improvements in the "old" sensor. If possible select a sensor from the second generation 4319.