How Masterflex Pumps with Open-Head Interlock Sensor Help Enhance Worker Protection

Masterflex L/S Digital Pump System with Easy-Load II Pump Head 77921-70According to the United States Department of Labor’s Bureau of Labor Statistics, approximately 2.8 million nonfatal workplace injuries were reported by private industry employers in 2015. Safety is top-of-mind for most companies. Because we understand safety concerns across many industries, Masterflex peristaltic pumps offer an option to help enhance protection in the workplace.


Open-head interlock sensor on select L/S® and I/P® pumps couples with quick-loading pump heads to shut down the drive when the pump head is opened, eliminating exposure to moving rollers connected to the drive shaft.


This feature is ideal for peristaltic pumps operating in a system where a programmable logic controller (PLC) or supervisory control and data acquisition (SCADA) system can control the pumps from a remote location. Unexpected remote actuation of the pump is prevented by the open-head interlock sensor, similar to lockout/tagout procedures. When an operator opens the pump head, intentionally or accidentally, power is removed from the pump drive that is connected to an interlock box. Power to the pump drive will not be restored until the operator closes the pump head. Open-head interlock sensor technology can also safeguard inexperienced peristaltic pump operators from injury while loading or changing tubing.

The retrofit system

Masterflex Retrofit SystemThe retrofit system is comprised of a control box and a new open-head interlock sensor equipped pump head. The pump head easily connects to the interlock control box that houses a control board for cutting off line voltage when the pump head is opened. If the pump head is opened during operation, the interlock control box instantly shuts down the drive. Power to the pump drive will not be restored until the operator closes the opened pump head. An indicator light on the box confirms the condition of the sensed head. The interlock control box on the retrofit system accepts input signals from up to two stacked pump heads and will respond to either head being opened. The box is supplied with a sensor-shorting plug to allow single-channel operation. When dual-channel operation is desired, this plug is removed and the second head is connected. This retrofit system is also NEMA 4X / IP66 rated for washdown making it ideal for pharmaceutical production, food processing, and other industries having critical cleaning protocols.


Masterflex Open-head Interlock Sensor - Video

Masterflex L/S and I/P Open-Head Interlock Sensor. Quick, simple tubing changes—tubing replacement and fluid changeover takes only seconds.
Date: 5/30/2018