Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Load Cell shopping experience:
1. Compare - without doubt the biggest advantage that the Load Cell offers shoppers today is the ability to compare thousands of Load Cell at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.
2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about
3. Testimonials - don't know anybody that has bought a Load Cell? Wrong! If the Load Cell is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.
4. Questions - Got a question about Load Cell then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....
5. Reputation - Never heard of the company selling Load Cell? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Load Cell and build up a picture of their reputation for sales, returns, customer service, delivery etc.
6. Returns - still worried that even after all of the above your Load Cell wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.
7. Feedback - happy with your Load Cell then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.
8. Security - check for the yellow padlock on the Load Cell site before you buy, and the s after http:/ /i.e. https:// = a secure site
9. Contact - got a question about Load Cell, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.
10. Payment - ready to pay for your Load Cell, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.
A
load cell is typically an electronic device (transducer) that is used to convert a force into an electrical signal. This conversion is indirect and happens in two stages. Through a mechanical arrangement, the force being sensed deforms a strain gauge. The strain gauge converts the deformation (
Strain (materials science)) to electrical signals. Normally, a load cell consists of four strain gauges in a wheatstone bridge configuration, but is also available with one or two strain gauges. The electrical signal output is normally in the order of a few millivolts and requires amplification by an instrumentation amplifier before it can be used. The output of the transducer is plugged into an algorithm to calculate the force applied to the transducer.
Although strain gauge load cells are the most common, there are other types of load cells as well. In industrial applications, hydraulic (or hydrostatic) is probably the second most common, and these are utilized to eliminate some problems with strain gauge load cell devices. As an example, a hydraulic load cell is immune to transient voltages (lightning) so might be a more effective device in outdoor environments.
Other types include
piezo-electric load cells (useful for dynamic measurements of force), and vibrating wire load cells, which are useful in geomechanical applications due to low amounts of
Drift (telecommunication).
Every load cell is subject to "ringing" when subjected to abrupt load changes. This stems from the spring-like behavior of load cells. In order to measure the loads, they have to deform. As such, a load cell of finite stiffness must have spring-like behavior, exhibiting vibrations at its
Normal mode. An oscillating data pattern can be the result of ringing. Ringing can be suppressed in a limited fashion by passive means. Alternatively, a
control system can use an
actuator to actively damp out the ringing of a load cell. This method offers better performance at a cost of significant increase in complexity.
Load Cell Types
- Double Ended Shear Beam
- Single Ended Shear Beam
- Single Column
- Multi Column
- Membrane
- Torsion Ring
- Bending Ring
- Pancake
- "S" Cell
Applications
- Finding the Center of Gravity of an object by weight
- truck weighing
- tension measurement
- force measurement
- railcar weighing
- hopper, tank and vessel weighing
- onboard Weighing
- electronic Crane Scales
- wireless Crane Scales
- structural health monitoring
External links
- Load cell tutorial
- Diagrams of load cell applications
- What is a loadcell?
-
- Tension Load cells
A
load cell is typically an electronic device (
transducer) that is used to convert a force into an electrical signal. This conversion is indirect and happens in two stages. Through a mechanical arrangement, the force being sensed deforms a
strain gauge. The strain gauge converts the deformation (Strain (materials science)) to electrical signals. Normally, a load cell consists of four strain gauges in a wheatstone bridge configuration, but is also available with one or two strain gauges. The electrical signal output is normally in the order of a few millivolts and requires amplification by an
instrumentation amplifier before it can be used. The output of the transducer is plugged into an
algorithm to calculate the force applied to the transducer.
Although strain gauge load cells are the most common, there are other types of load cells as well. In industrial applications, hydraulic (or hydrostatic) is probably the second most common, and these are utilized to eliminate some problems with strain gauge load cell devices. As an example, a hydraulic load cell is immune to transient voltages (lightning) so might be a more effective device in outdoor environments.
Other types include
piezo-electric load cells (useful for dynamic measurements of force), and
vibrating wire load cells, which are useful in
geomechanical applications due to low amounts of
Drift (telecommunication).
Every load cell is subject to "ringing" when subjected to abrupt load changes. This stems from the spring-like behavior of load cells. In order to measure the loads, they have to deform. As such, a load cell of finite stiffness must have spring-like behavior, exhibiting vibrations at its Normal mode. An oscillating data pattern can be the result of ringing. Ringing can be suppressed in a limited fashion by passive means. Alternatively, a control system can use an
actuator to actively damp out the ringing of a load cell. This method offers better performance at a cost of significant increase in complexity.
Load Cell Types
- Double Ended Shear Beam
- Single Ended Shear Beam
- Single Column
- Multi Column
- Membrane
- Torsion Ring
- Bending Ring
- Pancake
- "S" Cell
Applications
- Finding the Center of Gravity of an object by weight
- truck weighing
- tension measurement
- force measurement
- railcar weighing
- hopper, tank and vessel weighing
- onboard Weighing
- electronic Crane Scales
- wireless Crane Scales
- structural health monitoring
External links
- Load cell tutorial
- Diagrams of load cell applications
- What is a loadcell?
-
- Tension Load cells
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A load cell is an electronic device (transducer) that is used to convert a force into an electrical signal. This conversion is indirect and happens in two stages.
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