Laser thermometers are able to accurately measure temperature as well as measuring from a distance. They can be used to detect changes in temperature in walls & windows, for example by following the outline of a window to ascertain where the fitting needs improving.
- Choosing the right battery: Cordless (or battery powered) tools have a variety of chemical battery types; Li-ion is the latest technology, prior to that it was Ni-MH and Ni-Cad was the original. The higher the Ah (Ampere hours) the longer the interval between charges; the fewer times you recharge a battery the longer it will last. Some cordless tools can also come without batteries - sometimes referred to as naked, bare units or body only. These tools are supplied without a battery or charger and more often than not without any accessories; as a result they are significantly cheaper in price.
- The range is the key consideration when choosing between tools.