In-Line-Submersible-Load-Cell

In-Line Submersible Load Cell

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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.

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.

Features

  • 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

Spesification

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.

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