TTL Technologies Pvt. Ltd. Offers Electrical Testers with One Compact Tool. TTL Technologies Pvt. Ltd. Is an ISO/IEC 17025:2005 awarded company. The company manufactures Test Instruments. The Electrical Testers with One Compact Tool check voltage, continuity and current with one compact tool. With the T5, all the user has to do is select volts, ohms, or current and the tester does the rest. The Electrical Testers with One Compact Tool let the user check current up to 100A - without breaking the circuit. The Electrical Testers with One Compact Tool test leads accept optional accessories such as clips and specialty probes.