In-Line Submersible Load Cell | IP68 | Underwater Force Sensor | DDEN

O-Ring Sealed, Fully Submersible, Accurate and Easily Adaptable

  • Lead Time: 6 - 8 weeks
  • Buy online: https://appmeas.co.uk/shop/load-cells/dden/
DDEN In-Line Submersible Load Cell

At a Glance

  • Capacities: 0-50N up to 0-50kN
  • Output: 0.75mV/V to 2mV/V
  • Fully Submersible: IP68 to 10m
  • Accuracy: <±0.15%/RC (0.05% typical)
  • Optional Integral Amplifier
  • Ideal for any Freshwater Application
  • Fully Submersible Long-Term Immersion Protected
  • Underwater Protection Guaranteed Thanks to ‘O’ Ring Sealing
  • Greater Underwater Depth Ratings Available for Deep Sea Applications
  • Special Versions Alternative Construction Materials for Seawater and other Corrosive or Aggressive Media.

Description

Applied Measurements high accuracy DDEN in-line submersible load cell can be used in both tension and compression and is specially designed for applications where load or force needs to be measured underwater, or in areas subject to high humidity or the risk of flooding.

The submersible in-line load cell is sealed using ‘O’ rings to provide integrity at depths up to 10 metres as standard, with greater depths possible if the appropriate modifications are made to the design.  Applied Measurements standard in-line waterproof load cell model DDEN, is currently being used in various applications including wave tank measurement systems and mooring buoy cable tension monitoring.

Applied Measurements DDENA in-line submersible load cell is fitted with an ICA Series Load Cell Amplifier to provide a high-level analogue output, commonly 0-5Vdc, 0-10Vdc, ±10Vdc or 4-20mA, which is suitable for use with most data acquisition and control systems.  An RS485 digital output is also possible by fitting the DCell Load Cell Digitiser in place of the ICA.

Customised versions of our DDEN submersible load cell can be designed to meet your specific requirements.  Please contact Applied Measurements expert and friendly technical team using the form in the sidebar, or by phone on +44 (0) 1189 817339, we will be happy to help discuss your requirements.

Technical Specifications

Rated Capacity (RC)N0-50, 0-100, 0-250, 0-500, 0-1000, 0-2000, 0-5000, 0-10,000, 0-20,000, 0-50,000
Operating ModesTension/Compression / Tension & Compression
Sensitivity (RO)mV/V (nominal)50N = 0.5 / 100N=1.0 / 250N = 0.75 / 500N = 1.5 / 1000N up = 2.0
Zero Balance/Offset±%/Rated Output<1.0
Output Symmetry (tension vs. compression)±%/Rated Output<0.25 typical
Non-Linearity±%/Rated Output<0.15 (0.05 typical)
Hysteresis%/Rated Output<0.15 (0.05 typical)
Repeatability±%/Rated Output<0.1
Temperature Effect on Zero±%/Rated Output/ ˚C<0.005
Temperature Effect on Sensitivity±%/Applied Load/ ˚C<0.005
Input ResistanceOhms700
Output ResistanceOhms700
Insulation ResistanceMegohms>5000 @ 50Vdc
Excitation VoltageVolts AC or DC10 recommended (2-15 acceptable) - Note mV/V only, see page 5 for details of conditioned output versions.
Operating Temperature Range˚C-20 to +80
Compensated Temperature Range˚C0 to +70
Storage Temperature Range˚C-20 to +80
Safe Overload% of Rated Capacity150
Ultimate Overload% of Rated Capacity200
Deflection @ Rated Capacitymm50N=0.08; 100N=0.12; 250N=0.09; 500N=0.06; 1000N=0.04; 2000N=0.03; 5000N=0.02; 10,000N=0.015; 20,000N=0.01; 50,000N=0.03
Fundamental Resonant Frequency*kHz50N=1.7; 100N=1.3; 250N=0.72; 500N=1.18; 1000N=2; 2000N=3.1; 5000N=6.1; 10,000N=9.9; 20,000N=18.2; 50,000N=13.3
IP Rating (Environmental Protection)IP68 to 10m depth (please consult sales for greater depths)
Weight (excluding cable)kg50N to 20kN: 0.3kg / 50kN: 0.45kg,
Fatigue Life108 cycles typical (109 cycles on fatigue-rated version)
Cable Length (as standard)metres2
Cable Type4-core screened submersible, PUR (weight: 82g/m) sheath, Ø7.5
Construction Materials / Wetted Parts17-4PH Stainless Steel, 303 Stainless Steel, PUR, TPE, Silicone
Resolution1 part in 250,000 (with appropriate instrumentation)
Pressure Effect on Output9N/mH²O nominal
*The resonant frequency is calculated with the body of the load cell attached to a large plate, ensuring that only the sensing element oscillates: This is vital to achieve the highest natural frequency and subsequent frequency response.

Product Dimensions

DDEN In-Line Submersible Load Cell Outline Drawing

All dimensions are in mm

Model
Capacity
A
B
C
ØD
E
DDEN
0-50N up to 0-20kN
67
15
35
44
M12x1.75
DDEN
0-50kN
71
18
35
44
M16x2.0
DDENA
0-50N up to 0-20kN
67
15
35
44
M12x1.75
DDENA
0-50kN
71
17
37
50
M16x2.0

Wiring Details

WiremV/V Output3-Wire Voltage or Current Otput4-Wire Voltage Output2-Wire CurrentRS485 Digital
Red+ve excitation+ve supply+ve supply+ve supply+5.4 to +18Vdc supply
Blue-ve excitation0V common-ve supply-ve supply / signal-ve supply
White+ve signal (tension) *+ve signal+ve signalN/CRS485 (B) Data -ve
Yellow-ve signalN/C-ve signalN/CRS485 (A) Data +ve
ScreenTo ground - not connected to load cell body
* +ve signal in tension is standard, +ve signal in compression can also be offered.

Ordering Codes & Options

Core ProductCapacity (inc Engineering Units)Cable Length (m)Specials CodeExample Result
DDEN50N002000DDEN-50N-002-000
DDEN100N002000DDEN-100N-002-000
DDEN250N002000DDEN-250N-002-000
DDEN500N002000DDEN-500N-002-000
DDEN1000N002000DDEN-1000N-002-000
DDEN2000N002000DDEN-2000N-002-000
DDEN5000N002000DDEN-5000N-002-000
DDEN10kN002000DDEN-10kN-002-000
DDEN20kN002000DDEN-20kN-002-000
DDEN50kN002000DDEN-50kN-002-000

Mounting And Installation Accessories

Rod End Bearings for Tension Use

Designed to align forces through the principle axis of the load cell thus reducing the effects of extraneous forces, hence offering improved performance from the cell.

Rod End Bearings are used where tensile forces are being applied.

Maintenance-free rod ends are a complete units made up of a housing with both an integral shank (with an internal or external thread) and a maintenance-free spherical plain bearing, located within the housing.

Key Features:

  • Supports radial loads in a tensile or compressive direction.
  • Suitable for unilateral loads – can support alternating loads and alternating loads in combination with bearing GE..UK-2RS, consult sales.
  • Stainless Steel for corrosion resistance.
  • Are maintenance-free.
  • Fitted with radial spherical plain bearings.
  • PTFE composite sliding contact surfaces.
  • Enables compact adjacent construction thanks to its thin-walled design of the eye housing.
Rod End Bearing GIRSW

All dimensions are in mm

LOAD CELLORDERING CODESSize (D)BMAFLKJOSWGGLStatic load C0 kNDynamic load C kNLimiting Speed rev/minWeight g
DDEN + DDENA-50N to 20kNGIRSW-12RR-3161216123250662217.515.419M122234.532300115
DDEN-50kNGIRSW-16RR-316162115426485272219.322M162860.552.5230230

Case Studies

Submersible Load Cells Lower the Cost of Large Tidal Turbine Designs

close up of tidal turbine test rig

This case study aims to significantly reduce the cost of large scale tidal turbine designs using our submersible load cells. The tidal turbine test rig was placed in a state-of-the-art test tank, where the team were able to increasing the size, flow rate and turbulence levels within the tank. Lowering the cost of rotor blade manufacture would make this renewable energy more economical to use and widely accessible, benefiting not only the UK renewable tidal energy markets but developing tidal energy countries too. Our submersible load cells measured both the torque and the thrust of the underwater tidal turbine design.
Read more...