31. Due to the dependency on these particles there are limited applications for Doppler flow meters . 32. The amount of gas flow into the apparatus is measured and maintained through a flow meter . 33. Other changes were, different air flow meter , engine ECU, cam angle sensor and throttle position sensor. 34. Moorco makes pressure-release valves and liquid flow meters for the petroleum, industrial process and power industries. 35. Ultrasonic flow meters are one of the few devices capable of measuring in a biogas atmosphere. 36. Multiphase flow meter prototype equipment for magnetic resonance. 37. Each channel has a ball type flow meter . 38. The third type is the Open-Channel flow meter . 39. Positive displacement flow meters can provide better relative accuracy at low flows than orifice-type flow meters . 40. Positive displacement flow meters can provide better relative accuracy at low flows than orifice-type flow meters.