The document discusses Crude oil flow meters produced by JSN. It provides details on their chief engineer's background, measurement capabilities down to 0.1ml/min, maximum pressure of 1000bar, and applications in industries like automotive, aviation, mining, power and petroleum. It lists features of compact design, high accuracy, and stainless steel construction. Parameter specifications are given for various models with flow ranges from 3-300ml/min to 0.3-30l/min and connections from G1/8 to G1. Accuracy is 0.5%, temperature range is -30 to 80°C, pressure is 32bar, and output is square-wave pulse.