GF111B single phase reference energy meter with 100a clamp on ct is the latest product launched by our company after extensive visits to users and drawing on the advantages of similar products at domestic and abroad. The measurement part of the product adopts high-speed A D converter and DSP for digital processing technology, which greatly improves the accuracy and stability of measurement. The central processing part adopts 32-bit ARM embedded technology, which makes the instrument have novel interface, rich functions, clear and simple operation and stable performance. it has not only advantages of light weight, portable structure, high precision, high performance, powerful function, original interface, ease-to-use, but also work stability. It can measure U, I, P, Q, S, E, frequency, power factor, phase angle, harmonics etc. Accuracy class: 0.04.