TTL Technologies Pvt. Ltd. Offers Clamp Meters for Current Measurements. TTL Technologies Pvt. Ltd. Is an ISO/IEC 17025:2005 certified company. The company manufactures Test Instruments. The Clamp Meters for Current Measurements are designed to verify the presence of load current, AC voltage and continuity of circuits, switches, fuses and contacts. These small and rugged clamp meters are ideally suited for current measurements up to 400 A in tight cable compartments. The Clamp Meters offers DC voltage measurements and has a higher resolution for loads below 40 A.