with a water quality meter which requires a sample volume of 5-7L/min for optimum operation. The customer regularly has variation in sample pressure and this results in periodic poor readings from the analyzer. They would like to install a magnetic flowmeter with a low flow alarm setting. The tube diameter is 1 inch. Can you recomend a product that would do for this service. The problem is complicated by the prescnec of 50ppm of oil, and a high solids and possible scaling problems. The unit is to be installed in a Hazadous Area and will require IECEX IIA T3 certification.