Patent ID: 8994552
Filing Date: 2015-03-31
Classification: H04Q

Abstract:
1. An all-electronic utility gas meter with dual metrology units one of which can be exchangeable with MEMS mass flow sensing principle for city gas metering comprising: a meter body that has a flow channel connectable to the service pipe line; a main metrology unit as an insertion probe placed in the flow channel of the meter body; a secondary independent bypass metrology unit with a separate bypass channel connected to the flow channel of the meter body; a connection block which houses both the main metrology unit and the secondary independent bypass metrology unit; a meter head box that has two separate chambers to house the control electronics and the battery pack; a control electronic unit that has the capability to process, store and compare the data from the two metrology units; a battery pack that provides the power to the all-electronic utility gas meter and serves as a backup power in case of external power failure; a display unit which displays metrology data and meter operational status; a display glass cover that can withstand external electric magnetic interference; and a battery pack cover that is water proof; wherein said main metrology unit is formed as a probe which has a MEMS sensor chip placed at one end of a plate as the tip of the probe; and wherein surface direction of the MEMS sensor chip is in perpendicular to the gas flow direction.