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Digital Hygrometers. Digital hygrometer sense humidity by means of non-moving sensors whose electrical resistance is affected by moisture. The Weather Store offers a great selection of fine digital hygrometers for precisely measuring humidity. Digital hygrometers offer memory for high and low readings, don't fall out of calibration, and offer very good accuracy.
  A digital sphygmomanometer is used to measure blood pressure, just like the manual one. The difference is that the process of making the measurement is done electronical â¦ ly, and the display posts the results.t is a device used to measure blood pressure, comprising an inflatable cuff to restrict blood flow, and a mercury or mechanical manometer to measure the pressure. It is alway â¦ s used in conjunction with a means to determine at what pressure blood flow is just starting, and at what pressure it is unimpeded.