Electronics Forums > Load cells / Sensitivity

 Thread Tools Display Modes

# Load cells / Sensitivity

Efthimios
Guest
Posts: n/a

 02-03-2008, 07:35 PM
Hi,

In the specs the load cells sensitivity is given "mV/V" ex: 2mV/V.

How this is translated to force sensitivity, for example: mV/grf?

hrh1818
Guest
Posts: n/a

 02-04-2008, 12:59 AM
On Feb 3, 1:35 pm, Efthimios <(E-Mail Removed)> wrote:
> Hi,
>
> In the specs the load cells sensitivity is given "mV/V" ex: 2mV/V.
>
> How this is translated to force sensitivity, for example: mV/grf?

A load cell sensitivity is stated in terms of its rated full scale
load. An equation for the output would be:

Eout = (Sensitivity/Full scale load) * (Excitation Voltage) * (Applied
Force.)

Example Sensitivity = 2mv/V, Full Scale Load = 5 Kg, Excitation
Voltage = 10 Volts DC, Applied Load = 2.5 Kg

Eout = (2/5)* 10*2.5

Eout = 10 mV DC

Howard

Efthimios
Guest
Posts: n/a

 02-04-2008, 04:15 PM
On Feb 4, 1:59*am, hrh1818 <(E-Mail Removed)> wrote:
> On Feb 3, 1:35 pm, Efthimios <(E-Mail Removed)> wrote:
>
> > Hi,

>
> > In the specs the load cells sensitivity is given "mV/V" ex: 2mV/V.

>
> > How this is translated to force sensitivity, for example: mV/grf?

>
> A load cell sensitivity is stated in terms of its rated full scale
> load. *An equation for the output would be:
>
> Eout = (Sensitivity/Full scale load) * (Excitation Voltage) * (Applied
> Force.)
>
> Example Sensitivity = 2mv/V, *Full Scale Load = 5 Kg, *Excitation
> Voltage = 10 Volts DC, Applied Load = 2.5 Kg
>
> Eout = (2/5)* 10*2.5
>
> Eout = 10 mV DC
>
> Howard

Thanks Haward for the info.

Do you know if load cells/force sensors can pick up vibrations of up
to 1kHz? I can not find in the specs of the cells any info.

Efthimios

hrh1818
Guest
Posts: n/a

 02-04-2008, 05:01 PM
On Feb 4, 10:15 am, Efthimios <(E-Mail Removed)> wrote:
> On Feb 4, 1:59 am, hrh1818 <(E-Mail Removed)> wrote:
>
>
>
> > On Feb 3, 1:35 pm, Efthimios <(E-Mail Removed)> wrote:

>
> > > Hi,

>
> > > In the specs the load cells sensitivity is given "mV/V" ex: 2mV/V.

>
> > > How this is translated to force sensitivity, for example: mV/grf?

>
> > A load cell sensitivity is stated in terms of its rated full scale
> > load. An equation for the output would be:

>
> > Eout = (Sensitivity/Full scale load) * (Excitation Voltage) * (Applied
> > Force.)

>
> > Example Sensitivity = 2mv/V, Full Scale Load = 5 Kg, Excitation
> > Voltage = 10 Volts DC, Applied Load = 2.5 Kg

>
> > Eout = (2/5)* 10*2.5

>
> > Eout = 10 mV DC

>
> > Howard

>
> Thanks Haward for the info.
>
> Do you know if load cells/force sensors can pick up vibrations of up
> to 1kHz? I can not find in the specs of the cells any info.
>
> Efthimios

Two comments. A Google search on "load cell frequency response"
turned up several links to companies who said they make load cells
with a high frequency response. Only one mentioned an actual number.
That was Honeywell who said their Sensotec Model 11 can have a
frequency response up to 58 kilo hertz. Load ranges vary from 150
grams to 1000 lbs. I expect only load cells at the 150 gram end of
the range can achieve a 58 kilo hertz frequency response and there is
a drop off of the frequency response as the size of the load cell is
increased.

Howard

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are Off Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post JoeSchmoe Electronic Repair 9 09-22-2010 05:24 PM lodevaduh Electronic Projects 1 03-09-2010 03:08 AM Enzo Electronic Design 4 08-18-2005 05:44 PM Jason Crowell Photovoltaics 2 03-07-2004 04:24 PM SHIRLEY ANDERSON Photovoltaics 2 01-21-2004 02:35 PM