AC Resistance Instrument

 

 

Amongst the many variations of instrument design available from A T Services is the AC Resistance Instrument. One of the most fundamental measurements taken in science is that of resistance. Usually a simple direct-current measurement will suffice, i.e. a small current, of known magnitude, is passed through the circuit. By measuring the voltage potential developed across the circuit and dividing this value by the current through the circuit a measurement of resistance is obtained. This method of resistance measurement has drawbacks when applied to an electrochemical system wherein ionic mobility will cause surface changes to the measurement electrodes and, consequentially, the value of resistance indicated.

 

Using alternating current in place of direct current overcomes most of the measurement difficulties caused by ionic migration. The instrument pictured here is just one possible variation available from A T Services. Used in toxicology research for the testing of membranes prior to experimental procedure, this instrument will test the integrity of the membrane, i.e. is the membrane perforated. The full-scale measurement range of the instrument is 200kΩ with an absolute accuracy of better than 1%. This instrument is part of the “toxicology kit” comprising, in addition, dermatome and cells. Please click here to go to our Toxicology Page

 

 

We can design and manufacture AC resistance instrumentation bespoke to your requirements. Please contact us for help and advice regarding this or any other technical problems you are having with your research instrumentation.

Please go to AT Services home page for contact details.