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ELWF Miniature Load Cell

Kraftsensor ELWF

The ELWF series compression load cells raise the bar for high performance at low cost. Measurement Specialties proprietary Microfused™ technology, derived from demanding aerospace applications, employ micro-machined piezoresistive strain gages fused with high temperature glass to a high performance stainless steel force measuring flexure. Microfused™ technology eliminates age-sensitive organic epoxies used in traditional load cell designs providing excellent long term span and zero stability. Operating at very low strains, Microfused™ technology utilizes strain gages providing gage factors greater than 100, an essentially unlimited cycle life expectancy, superior resolution, exceedingly high over-range capabilities (without the need for stops) and a ratiometric span of 20 mV/V. High level of 0.5 to 4.5 V ratiometric outputs (/AMP) available operating from 5 Vdc excitation.

Microfused™ sensors are ideal for your test and measurement applications. Shielded, Teflon insulated instrumentation cabling is provided along with full NIST traceable calibration certificates. The ELWF unit is fully thermally compensated and will provide an essentially unlimited cycle life expectancy. The ELWF can be configured with a variety of options to fine-tune the instrument to your application: select from several standard compensated temperature ranges, input voltages, lead lengths or specify entirely unique combinations of these options.

Features

  • Through-Hole Design
  • Low Cost
  • Low Profile
  • Low Noise
  • Robust: High Over-Range
  • High Reliability
  • Low Deflection
  • Fast
  • Essentially Unlimited Life Cycle
  • Optional High Level Output: 0.5 V to 4.5 V (Option /AMP)

Applications

  • Bolt Loads
  • Assembly Forces
  • Biomedical Force Measurement
  • Tool Forces
  • Thrust Measurements
  • Robotics End Effectors

SpecificationAll values at temperature 25 °C and supply voltage 5 V

Parameter Value

Full Scale Output Span (1):

Model D1, D2, D3: 20 mV/V ( 19 … 21 mV/V)
Model B1: 6 mV/V ±5 %

Zero Force Output, max.:

±5 % FSO

Non-Linearity, max.:

±1 % FSO

Hysteresis, max.:

±1 % FSO

Temperature Error – Zero, max.:

±0.05 % FSO/K

Temperature Error – Span, max.:

±0.05 %/K

Maximum Over Load:

Ranges up to 5 kN (1 klbf): 200 %
Ranges > 5 kN (1 klbf): 150 %

Impedance Input, max.:

3 kΩ

Impedance Output, max.:

2.2 kΩ

Compensated Temperature Range:

+20 … +80 °C

Operating Temperature Range:

-40 … +120 °C

Supply Voltage:

5 VDC

Isolation Resistance, max.:

50 MΩ at 250 VDC

Deflection at Rated Load, typ.:

<0.05 mm

Cycle Life Expectancy:

Essentially unlimited

Notes:
1. High level output 0.5 … 4.5 V optional

Standard Ranges Body Style

N

lbf

  

25

5

B1

50

10

B1, D1

100

20

B1, D1

500

100

D1, D2

1k

200

D2

2.5k

500

D2

5k

1k

D3

10k

2k

D3

Dimensions

Dimensions of Loadcell ELWF

All dimensions in mm [inch], approx. values. These drawings are for information only and not intended for construction purpose. Please ask for detailed drawings.

Wiring

Wiring of Load Cell ELWF

Options and Ordering Information

Options and Ordering Information of Loadcell ELWF

Note:
L=lbf ; N=Newton.
Newton range units must have cable lengths specified in meters. Lbf range units must have cable lengths specified in inches.

Option Code Description

Compensated Temperature Range

Standard

+20 … +80 °C
 

Z0

-40 … +20 °C
 

Z1

-20 … +40 °C
 

Z2

0 … +60 °C
 

Z*

Non-standard

Supply voltage

Standard

5 VDC
 

V00

T1 models: Replace “00” with excitation between 1 and 10 V.
(At excitations less than 5 V sensitivity decreases
proportionately.) Sensitivity at excitations > 5 V equals 20 mV/V.)
 

V2.5

Sensitivity equals 50 % of nominal data sheet value
 

V10

Sensitivity equals 100 mV FSO.
Note that input impedance may increase substantially
when excitations >5 Vdc are specified.

Cable length

Standard

1.5 m (5 ft)
 

L00F

Replace “00” with the total cable length in feet.
Specified on units with lbf range.
 

L00M

Replace “00” with the total cable length in meters.
Specified on units with N range.

Compensation Module Location

MxxP

Replace XX with percentage of cable length.

Connector wired to cable

C

Microtech type male or equivalent (w/o mate)
 

R

RJ telephone type male (w/o mate)

Calibration

AN

Calibrate lbf range unit in Newtons
 

AL

Calibrate N range unit in lbf

Amplifier Module

AMP

Amplified output option provides 0.5 … 4.5 V output ±5 %
ratiometric (5 VDC input only), module dimensions
10.16 mm OD x 38.1 mm length

Special Notes:

  

Provided with full NIST calibration, spring strain relief and
Teflon shielded cable. Housing styles offered: B1, D1, D2, D3
and D4. Sensitivity for all ranges: 20 mV/V
Die Informationen im PDF-Datenblatt (siehe oben) können ausführlicher sein. Technische Änderungen und den Austausch von Werkstoffen, die der Verbesserung der Produkte dienen, behalten wir uns vor.