SPH Engineering products

A magnetic field is the area around a magnet, magnetic object, or an electric charge in which magnetic force is exerted. Earth behaves like a giant magnet. The two primary characteristics of magnetic fields are their strength (referred to as magnetic flux density or magnetic induction) and direction. A magnetometer is a device that measures the magnetic field at a point where it is.

Ground Penetrating Radar (GPR) uses radar pulses to detect and image underground objects and features. A GPR transmitter emits electromagnetic energy into the ground. When the energy encounters a buried object or a boundary between materials having different dielectric permittivities (a property that defines the speed of electromagnetic waves), it may be reflected to the receiving antenna of GPR. The GPR electronics can then record the variations in the return signal.

An echo sounder is a device to measure the depth of water (or any liquid). An echo sounder sends out sound waves and measures how long it takes for the echo of the sound to come back. The speed of sound in the water is known so that the depth can be calculated. Echo sounders are crucial tools for environmental monitoring and mapping underwater terrain.