Trumeter APM-SHUNT-APO 72 x 72 Shunt Meter Positive LCD with relay output.
Tribrer APM 60 Mini Handheld Fiber Optical Power Meter
Series APM/MPM/PPM | Dual-Line Analog Input Rate/Totalizer applies to level monitoring, pump control, flow rate indication, and process control. Designed for displaying flow rate and total from a flow meter. | Dwyer