Pla manufactures digital panel meters with large and extra bright one-inch led display in the standard 46 mm x 92 mm cutout. This facilitates visibility from long distance, yet maintaining the same cutout. These panel meters are available for measuring mains frequency, ac or dc voltage, ac or dc current, ohms and parameters in 4 to 20 ma. Mains frequency is measured from 10 hz to 99.99 hz with a sensitivity of 50 v ac to 250 v ac and basic accuracy of 0.0 1%. Dc voltage is measured with basic accuracy of 0.1i%. These panel meters are very stable and operate from 230 v ac. They are also available with half inch led display and lcd modules.