Hi, I'm a newbie to engineering and wondered if anyone new of a hand held electronic distance measuring device. The device would need to measure up to 500 meters and may possibly need to operate on multiple frequencies. The idea would be that there would be a target that I need to measure the distance from, but there might be multiple such targets in the surrounding area (hence the need for multiple frequencies). The target would listen for a particular frequency and then return a signal to the hand held device for the distance to be calculated. Does anyone know of such a device on the market at the moment or how best to implement?
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