Rectifiers & Electronics offers Power Frequency Spark Tester. . Rectifiers & Electronics is an ISO 9001:2000 certified company. Rectifiers & Electronics manufacture testing equipment such as AC/DC High Voltage Test Sets and Other Electrical High Voltage Test Equipment. The Power Frequency Spark Tester is mainly used by cable and wire manufacturers. It features efficiency gradient of approximately 85 percent. This tester leaves a mark on the cable or wire which can be easily found. It is suitable up to 200 Meter per minute. This Power Frequency Spark Tester can be easily operated.