Paroscientific 8CDP Digiquartz Intelligent Depth Sensors - 60m, 270m, 2000m, 4000m

Available as:
  • Rental
  • Sale (ex rental)

Paroscientific 8CDP Digiquartz Intelligent Depth Sensors (60m, 270m, 2000m and 4000m) - Available for rental, hire and ex-rental purchase from Ashtead Technology.

The Paroscientific 8CDP Series Intelligent Digiquartz® Depth Sensors provide the ultimate in precision water level measurement. Typical application accuracy of 0.01% is achieved even under difficult environmental conditions. The remarkable performance of these depth sensors is achieved through the use of precision quartz crystal resonator whose frequency of oscillation varies with pressure-induced stress. A quartz crystal temperature signal is provided to thermally compensate the calculated pressure and achieve high accuracy over a broad range of temperatures. The depth sensors include waterproof housings with integral shock protection.

High accuracy, resolution, and stability make Digiquartz® Depth Sensors ideal for applications such as Tsunami detection, wave and tide gauges, platform levelling, underwater pipe laying and as depth sensors in ROVs and AUVs. All Depth Sensor ranges are available with either frequency outputs or integral intelligent electronics with bi-directional digital communications. (RS-485 Interfaces are only applicable to new models) Ashtead Technology has three ranges available; 60m, 270m and 700m are available, however deeper rated units are also available on request.

Dual RS-232 interfaces and on the new models RS-485 interfaces allow complete remote configuration and control of all operating parameters, including resolution, sample rate, and choice of engineering units, integration time and sampling requests. Commands include: Single sample and send, synchronised sample and hold, continuous sample and send, and special burst sampling modes.

Desirable characteristics include excellent long-term stability, 1 x 10-8 resolution, low power consumption and high reliability.

Key features

  • 0.01% Accuracy
  • 1x10 8 Resolution
  • Unique Anti-Fouling Port


  • Hydrology
  • Oceanography
  • Tsunami Detection
  • Wave & Tide Gauges
  • Offshore Platform Levelling
  • Dam and Reservoir Level Sensing
  • Underwater Pipe Laying and Surveying
  • Remotely Operated and Autonomous Underwater Vehicles

Technical specifications

Pressure PerformanceAccuracy typically better than 0.01%
Calibrated operating range-2 to + 40°C
Hysteresis+/- 0.005% of full scale
Repeatability+/- 0.005% of full scale
Over Pressure1.2 times full scale
Depth Ranges0 to 60m/0 to 89 psi 0 to 270m/0 to 400 psi 0 to 700m/0 to 1000 psi
Thermal Sensitivity<0.0008% full scale / deg C
Power Requirement+6 to + 25 VDC (+6 to +18 VDC for newer heads)
Quiescent Current12mA
Max. Current25mA
Baud Rate150-19200 user selectable
Input Voltage+6 (Min) to +16 VDC
Current Consumption16.5 mA Quiescent, 32 mA max @ +6 VDC
Output SignalRS-232 meets EIA/TIA specs RS-485 meets EIA/TIA specs (only on new models)


Weight2.26 kg5 lbs
Dimensions362 x 89mm14.3 x 3.5""