Testo infrared thermometer 835 t1 835 t2 835 h1 testo 0560 8351 get started in the field of intelligent infrared measuring technology with this practical infrared thermometer from testo the 835 t1 offers maximum safety and precision when measuring the temperature of smaller objects from a medium distance such as monitoring wall temperature troubleshooting in heating and air conditioning systems orquality control of industrially manufactured productsthe 4 point laser clearly indicates