Purpose: It is specially designed and made for GDP-1 Inclinometer and GDX-3 Inclinometer. Its output voltage can be graded and adjusted, so it is convenient, reliable and widely applicable. Excepting these two kinds of instruments, it can also be used for other instruments. Technical parameters 1. Input voltage: AC 220V±10%, 50 Hz; 2. Output voltage: (1) First group: DC 15-50 V; (2) Second group: DC 85-150 V; 3. Output current: the maximum is 0.6A;