Less than 1 second response time READS POWER DETECTORS Thermopiles and photo detectors of the PH100 and PH20 series LARGE LCD DISPLAY • 77 x 58 mm • 5 mm digits • Backlight (with AC adaptor) 3 DISPLAY FUNCTIONS FOR THE NEEDLE • Normal • Tail (indicates speed) • Bargraph Also high and low values hold SINGLE-BUTTON NAVIGATION Direct access and long press access to the main functions LOW CONSUMPTION Lasts 500 hours with 4 AA alkaline batteries