... thickness gauge, film/coating thickness gauge, digital hygrothermograph, high voltage megohmmeter, ground resistance tester, electric leakage switch tester,gas detector.2. Specification ModalTL816measuring itemswind ... :± 5%wind temperatureaccuracy: ± 2º Cresolution0.2º C, 0.2m/sLCD digital display low voltage displayauto power off after 14 minutesLCD backlight ...