Valeport Midas ECM (formerly 808 Current Meter)

Available as:
  • Rental
  • Sale (new & ex rental)

Valeport Midas ECM – Available for rental, hire and purchase from Ashtead Technology.

The Midas ECM is a highly versatile point current meter, designed with durability and ease of deployment in mind. Valeport's latest electronics architecture allows multiple additonal sensors, and a variety of communications options, making it one of the few multiparameter current meters that allows real time operations over several thousand meters of cable, as well autonomous deployments. The result is a versatile, easy to use instrument, ideal for use by oceanographers, hydrographers and surveyors who require a solid state, multi-parameter current meter.

Sale Information
Ex-rental and new unit for sale - sold as seen. Contact us for information.

Key features

  • Self recording and/or direct reading
  • Discus EM sensor [annular and spherical options
  • Flux gate compass
  • Continuous and burst sampling
  • Optional Conductivity, Temperature, Pressure, Pitch/Roll sensors
  • Optional built in auxiliary sensor port
  • Fast Response PRT Temperature sensor
  • Pressure balanced inductive conductivity sensor
  • Valeport EMLog″! Windows based user software
  • Programmable sampling regime
  • Data direct to PC
  • Direct computation of Salinity, Speed of Sound and Density
  • Large 1 Mbyte memory option
  • Sealed electronics module not exposed during battery changes
  • Long cable lengths
  • 3 Year Warranty
  • Stainless Steel or Acetal Housing


  • Oceanographic studies
  • Hydrographic surveys
  • Coastal and Estuary surveys
  • Education
  • Marine research

Technical specifications

Current Speed SensorType: Valeport 11cm discus EM Range: ± 5m/s Accuracy: ± 1% +5mm/s Resolution: 0.001m/s Response Time: 125 ms
Current Direction SensorType: Valeport gimballed flux gate compass Range: 0 to 360° (up to 20° gimbal)
Accuracy: ± 1° Resolution: 0.25° Response Time: 100 ms
Conductivity SensorType: Pressure balanced induction coils Range: 0.1 to 60 mS/cm Accuracy: ± 0.05
mS/cm Resolution: 0.003 mS/cm Response Time: 100 ms
TemperatureType: Slow PRT Range: -5 to +35 °C Accuracy: ± 0.02 °C Resolution: 0.002 °C
Response Time: 250 ms
Temperature (optional)Type: Fast PRT Range: -5 to +35 °C Accuracy: ± 0.02 °C Resolution: 0.002 °C
Response Time: 100 ms (60 ms without guard)
PressureType: Strain Gauge Range: 100, 500, 1000, 2000 or 3000dBar Accuracy: ± 0.1%FS
Resolution:0.005%FS Response Time: 20 ms
Pitch and RollType: Capacitive Bubble Range: ± 30° Accuracy: ± 1° Resolution: 0.25° Response
Time: 100 ms
AuxillaryRange: 0 to 5v Accuracy: ± 1mV Resolution: 0.25mV
SalinityType: Derived (SAL78) Accuracy: ± 0.07 PSU Resolution: 0.003 PSU
Speed of SoundType: Derived (user selectable formula) Accuracy: ± 0.25m/s Resolution: 0.02m/s
Density Anomaly GammaType: Derived (EOS80) Accuracy: ± 0.06 kg/m3 Resolution: 0.01 kg/m3
MaterialAcetal and Stainless Steel 316
Depth Rating1000m (acetal),3000m (stainless steel)


Dimensions - body1000mm x 118mm39.4 x 4.6""
Dimensions - cage1240 x 300 x 200mm48.8 x 11.8" x 7.9""
Weight in air24kg (acetal),35kg (st. steel)52.9 lbs (acetal), 77.2 lbs (st. steel)
Weight in Water14kg (acetal), 25kg (st. steel)20.9 lbs (acetal), 55.1 lbs (st. steel)
Shipping Case Size1300 x 280 x 380mm51.2 x 11" x 15""
Shipping Weight36kg (acetal), 47kg (st.steel)79.4lbs (acetal), 103.6lbs (st.steel)