Are you still using measuring tape ? Let me introduce one of the latest distance measuring device which can measure distance by laser. This devices are called as laser distance meter. it's time saving and reduces man power. LDM is having different ranges and specification. One of the basic model is disto d1. You can check more details of this model by clicking below link. http://www.acroenterprise.net/products/laser-distance-meter-disto-d1-40-meter-/79