VisaGage II and Liquid Blockage Monitor Systems (LBMS)
The John Blue Flow Monitor Calculator works on your desktop and laptop computers. It’s used to calculate your flow rate in equivalent gallons per minute per row (based on your fertilizer weight) and helps you determine the most appropriate ball to use in your VisaGage II or Liquid Blockage Monitor System (LBMS) flow monitor device. The calculator is available in both English and Metric units. Instructions for use are available at the bottom of the page.