The FLEXFLO® A-100NE Series peristaltic metering injector from Blue-White Industries, with pulse input batching and time interval control, has a variable speed motor and is now equipped with Blue-Whites patented Tube Failure Detection System. The TFD System will detect many chemicals (chlorine, acids, etc.); if a non-compatible chemical is detected in the pump head, the injector shuts off. The problem chemical must be cleaned from the pump head before the injector will restart. Additionally, the injector comes equipped with a digital interval timer for near infinite turndown ratio; repeating interval and injection time cycles which are programmable in seconds, minutes, hours and days. It also accepts pulse inputs for time on per single pulse, or multiple pulses. The A-100NE also accepts 4-20mA and 0-10Vdc signals for external injection control.