The integrated flow monitor of a Loctite® Controller in connection with the Preamplifier Online Monitor 97221 is used for monitoring the quality and quantity of adhesives dispensed on parts, i.e. the flow monitor recognizes and evaluates dispensing defects with respect to quality and quantity. Such defects include air bubbles or pressure changes in the dispensing system, a lost or clogged dispensing nozzle and a touch down of the dispensing nozzle onto the substrate. The Online Preamplifier has been specifically designed for applications requiring high accuracy in dispensing Loctite® Adhesives. It’s an ideal tool for quality assurance.