visitors this year: 130 A colorimeter for the reaction of acid and thiosulfate – rates of reaction The reaction of acid with thiosulfate produces a precipitate in a beaker, and we normally measured how...
visitors this year: 27 Might be used for measuring the variation in UV light during the day or as meter to compare sun creams and sunglasses. UV sensors can be found in ‘wearables’ like...
visitors this year: 32 Used like a wand and moved in magnetic fields. Interesting in the way it measures the unseen. Has a niche use in applications showing magnetic field changing over time or...
visitors this year: 27 Uses a separate Geiger probe to measure radioactive counts or count rate. Most useful are those that show the count rate at a point in time – with a fast...
visitors this year: 37 A less widely used sensor that nevertheless shows interesting results when monitoring environments over time. Place one in a polythene bag with your hand, or a plant and see how...
visitors this year: 31 This sensor is used in conjunction with a conductivity cell. It tends to used as a stand-alone meter to measure salinity or total dissolved solids in water. Offers some enhancement...
visitors this year: 98 Often used elaborately to produce a makeshift colorimeter, the light is very useful for many biology and chemistry experiments on rates of reactions. As monochromatic light is less important with...
visitors this year: 19 Used to measure the flow and direction of heat through clothing or building materials. It contains countless thermistors and unlike a temperature sensor, provides readings as Watts/m2. While its classroom...
rogerfrost.com is a compendium of ideas for using technology with sciencey questions in mind. Started in 1995 to offer ideas to school science teachers, Roger Frost expanded the coverage to home automation, gadgets and sensors to monitor, or understand, what’s going on around us.
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