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

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

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

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 DDEN an 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. To ensure high integrity underwater, Applied Measurements submersible in-line load cell sensor is constructed from Stainless Steel and has a moulded cable exit with vented polyurethane (PUR) cable (NBR, TPE and silicone seals are optional) along with an internal strain wire. Its IP68 protection rating ensures it can be used at depths of up to 10m in long term submersion in water. The vented tube linking the inside of the DDEN to the air filter positioned at the other end of the cable is there to provide an atmospheric pressure reference for the sensor to ensure that the sensor’s output is not affect when it changes and should not be removed.

Technical Specifications

Rated Capacity (RC) N 0-50, 0-100, 0-250, 0-500, 0-1000, 0-2000, 0-5000, 0-10,000, 0-20,000, 0-50,000
Operating Modes Tension/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 (BFSL) <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 Resistance Ohms 700
Output Resistance Ohms 700
Insulation Resistance Megohms >5000 @ 50Vdc
Excitation Voltage Volts AC or DC 10 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 ˚C 0 to +70
Storage Temperature Range ˚C -20 to +80
Safe Overload % of Rated Capacity 150
Ultimate Overload % of Rated Capacity 200
Deflection @ Rated Capacity mm 50N=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* kHz 50N=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) kg 50N to 20kN: 0.3kg / 50kN: 0.45kg,
Fatigue Life 108 cycles typical (109 cycles on fatigue-rated version)
Cable Length (as standard) metres 2
Cable Type 4-core screened submersible, PUR (weight: 82g/m) sheath, Ø7.5
Construction Materials / Wetted Parts 17-4PH Stainless Steel, 303 Stainless Steel, PUR, NBR, TPE, Silicone
Resolution 1 part in 250,000 (with appropriate instrumentation)
Pressure Effect on Output 9N/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

Wire mV/V Output 3-Wire Voltage or Current Otput 4-Wire Voltage Output 2-Wire Current RS485 Digital
Red +ve excitation +ve supply +ve supply +ve supply +5.4 to +18Vdc supply
Blue -ve excitation 0V common -ve supply -ve supply / signal -ve supply
White +ve signal (tension) * +ve signal +ve signal N/C RS485 (B) Data -ve
Yellow -ve signal N/C -ve signal N/C RS485 (A) Data +ve
Screen To 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 Product Capacity (inc Engineering Units) Cable Length (m) Specials Code Example Result
DDEN 50N 002 000 DDEN-50N-002-000
DDEN 100N 002 000 DDEN-100N-002-000
DDEN 250N 002 000 DDEN-250N-002-000
DDEN 500N 002 000 DDEN-500N-002-000
DDEN 1000N 002 000 DDEN-1000N-002-000
DDEN 2000N 002 000 DDEN-2000N-002-000
DDEN 5000N 002 000 DDEN-5000N-002-000
DDEN 10kN 002 000 DDEN-10kN-002-000
DDEN 20kN 002 000 DDEN-20kN-002-000
DDEN 50kN 002 000 DDEN-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 CELL ORDERING CODES Size (D) B M A F L K J O SW G GL Static load C0 kN Dynamic load C kN Limiting Speed rev/min Weight g
DDEN + DDENA-50N to 20kN GIRSW-12RR-316 12 16 12 32 50 66 22 17.5 15.4 19 M12 22 34.5 32 300 115
DDEN-50kN GIRSW-16RR-316 16 21 15 42 64 85 27 22 19.3 22 M16 28 60.5 52.5 230 230

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