Metal detectors are portable electronic devices used for detecting the presence of any metal close by. They operate by sensing changes in magnetic waves caused by metal. The metal objects can be anything from old coins to gold nuggets.
A tachometer is a device for measuring the rotation speed of an object such as the engine shaft in a car. It basically indicates the revolutions per minute (RPM) performed by the object. It is also referred to as tach, revolution-counter, rev-counter, and RPM gauge.
A net radiometer is an actinometer used for measuring net radiation at the Earth’s surface. The net radiation normal to the earth's surface is the difference between the total upward radiation flux and the total downward radiation flux.
Most of the sensor systems rely on light as the signal source. LEDs are often ideal as a light source due to their high efficiency.
The thermometer was developed over several years by a number of people - Cornelis Drebbel, Robert Fludd, Galileo Galilei and Santorio Santorio. The word thermometer was derived from two Greek word fragments – ‘thermo’ meaning ‘heat’ and ‘meter’ meaning ‘to measure’.
Researchers at Cornell University have used a small silicon chip to develop a microfluidic water sensor with a higher degree of sensitivity compared to other water sensors on the market.
By Kalwinder Kaur
14 Oct 2013
LUMO BodyTech, founded in 2011, has developed a wearable sensor and smartphone application to monitor an individual's posture.
By Kalwinder Kaur
10 Oct 2013
Broadly speaking, pyrometers belong to a class of thermometers that are used for measuring only high temperatures. However, today they have been modified to measure low temperatures as well.
A bolometer is a highly sensitive instrument used for detecting heat or electromagnetic radiation. It was invented by Samuel Pierpont Langley, an American astronomer, in 1878. This instrument was initially used in combination with a telescope to quantify infrared radiation.
Kiwi Wearable Technologies – a new start-up company - has developed a cutting-edge internet-enabled motion sensing device that can track your activity and is capable of making your living environment an automated experience.
By Kalwinder Kaur
1 Oct 2013