| 摘要 |
A contamination meter 1 comprising a plurality of electrodes 9, preferably at least three, arranged to be brought into contact with a test medium, measures the electrical resistance of the test medium between one or more pairs of electrodes 9, wherein the electrodes 9 are arranged such that the resistance is measurable between pairs of electrodes 9 at different points across the test medium. There may be a grid of electrodes 9 in which the rows and columns are equally spaced apart. The test medium may be a sheet of material and the meter may be arranged to receive the sheet of material and to retain the sheet of material so that the sheet of material is brought into contact with at least two electrodes 9 in the array. The test medium may be sandwiched between a flat contact surface 7 and a lid 5. The meter may determine the concentration of salt on a test medium based on the resistance values between pairs of electrodes 9. The meter may have a display 19 on which the resistance between pair of electrodes 9 is represented. |
