ultra-violet sensor
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 smartbands and watches. My...
Tagged: other sensor
magnetic field – Hall probe
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 some electrical variable. My...
radioactivity – Geiger-Muller
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 decaying source you can...
humidity sensor
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 the humidity changes. The...
conductivity sensor
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 when used to monitor...
heat flow sensor
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 uses seem limited, this...
