Wheatstone Bridge - Where can one buy it?
Wheatstone Bridge - Where can one buy it?
(OP)
Our Wheatstone Bridge that has been in use for a good 40 - 50 years has finally come to a point where it needs to be replaced by a new unit. I searched several places that might possibly sell one but they didn't have any. Can anyone please recommend a place that sells them.
eemotor
eemotor





RE: Wheatstone Bridge - Where can one buy it?
www.google.com/froogle?q=Wheatstone+Bridge
Plus, there's always e-bay.
RE: Wheatstone Bridge - Where can one buy it?
to meeet? The WB is accurate but tedious and time consuming to use -- a modern device may be a more convenient replacement
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: Wheatstone Bridge - Where can one buy it?
RE: Wheatstone Bridge - Where can one buy it?
RE: Wheatstone Bridge - Where can one buy it?
Give us a clue: what is the range of resistance that you want to measure, and what accuracy do you require? There are a few applications where the bridge is still a reasonable option, but in honesty this doesn't sound like one.
The likes of Agilent, Fluke and Keithley Instruments all manufacture instruments which go from mid-range bench meters to top-of-the-line reference instruments for the calibration labs. Call their tech support and discuss your application.
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If we learn from our mistakes,
I'm getting a great education!
RE: Wheatstone Bridge - Where can one buy it?
Knowing your test requirements would help, however there is a wide range of resistance measurement testers such as;
This Agilent Milliohmeter ht
which should cover your resistance range, is accurate but expensive.
HOWEVER by defining your test requirements you could find that a $20 digital multimeter will do the job!
Tell us;
Typical resistance value
Accuracy of resistance measurement
DC or AC measurement (if AC what frequency)
Do you want the measurement at a set current or voltage
Do you also want to measure capacitance or inductance?
Do you want to do an insulation resistance test?
regards
Pete
(TurboXS)
RE: Wheatstone Bridge - Where can one buy it?
RE: Wheatstone Bridge - Where can one buy it?
RE: Wheatstone Bridge - Where can one buy it?
Accuracy costs money.
10% accuracy can be a very cheap digital multimeter (<$20)
1% accuracy can be a average to good digital multimeter (tens to hundreds of dollars)
0.1% accuracy needs specialised measuring instrument (thousands of dollars)
You should also consider that specialised measuring equipment should be treated carefully.
You also need to consider the cost of calibration. You can find that the yearly cost of calibrating a high accuracy unit could buy you a brand new moderate accuracy unit each year.
regards
Pete
(TurboXS)
RE: Wheatstone Bridge - Where can one buy it?
You should ideally look for a four-terminal (or Kelvin) resistance measurement technique as this will avoid the test leads introducing inaccuracy. This would rule out most hand-helds, but it is common even on entry-level bench instruments.
The other thing to consider is that hand-helds are portable and tend to grow legs. A bench instrument is easier to mount in a rack, and not so attractive to the 'borrowers'.
----------------------------------
If we learn from our mistakes,
I'm getting a great education!
RE: Wheatstone Bridge - Where can one buy it?
Besides, it's 'just' a motor. I doubt that he needs even 1%.
RE: Wheatstone Bridge - Where can one buy it?