The new TCSA Series current sensor is a loop-powered, linear-output current transducer that provides an output that is directly proportional to the RMS ac current passing through its toroidal sensor. The unit provides a 4- to 20-mA output over a power supply range of 10 to 30 vdc. Each sensor is calibrated for monitoring from 0 to 5, 0 to 10, 0 to 20, or 0 to 50 amps in four ranges. The unit is designed for sensing the current draw on equipment such as motors, fans, heaters, solenoids, and others. SSAC Inc., P.O. Box 1000, Baldwinsville, NY 13027; 800-377-7722 or 315-638-1300; 315-638-0333 (fax); (e-mail); (Web site).