An adhesive tracking system for monitoring an output of hot melt adhesive, the adhesive tracking system comprising: a flow meter having a flow inlet passage and a flow outlet passage, wherein the flow meter is configured to measure an amount of hot melt adhesive flowing through the flow meter and out of the flow outlet passage; a manifold configured to output the hot melt adhesive, wherein the manifold is in fluid connection with the flow meter; at least one product detector configured to sense a presence of a product to which the hot melt adhesive is applied; and a controller in communication with the flow meter and the at least one product detector, characterized in that, the flow meter comprising a housing body having a hollow central recess and a pair of rotatable gears provided in the hollow central recess, and at least one sensor (88a, 88b) configured to measure the amount of hot melt adhesive; a housing cover removably attached to the housing body and having a flat inner surface proximal to the hollow central recess of the housing body; the pair of rotatable gears being rotatably secured between the housing body and the housing cover; wherein the flow inlet passage of the flow meter is configured to receive hot melt adhesive from the manifold, and the flow outlet passage of the flow meter is configured to discharge hot melt adhesive back into the manifold, and wherein the controller having a processor configured to: determine a start time and an end time for application of the adhesive to the product based on the presence of the product received from the product detector, receive the amount of the adhesive flowing out of the flow outlet of the flow meter from the start time to the end time, and associate the amount of the adhesive with the product. a flow meter having a flow inlet passage and a flow outlet passage, wherein the flow meter is configured to measure an amount of hot melt adhesive flowing through the flow meter and out of the flow outlet passage; a manifold configured to output the hot melt adhesive, wherein the manifold is in fluid connection with the flow meter; at least one product detector configured to sense a presence of a product to which the hot melt adhesive is applied; and a controller in communication with the flow meter and the at least one product detector, characterized in that, the flow meter comprising a housing body having a hollow central recess and a pair of rotatable gears provided in the hollow central recess, and at least one sensor (88a, 88b) configured to measure the amount of hot melt adhesive; a housing cover removably attached to the housing body and having a flat inner surface proximal to the hollow central recess of the housing body; the pair of rotatable gears being rotatably secured between the housing body and the housing cover; wherein the flow inlet passage of the flow meter is configured to receive hot melt adhesive from the manifold, and the flow outlet passage of the flow meter is configured to discharge hot melt adhesive back into the manifold, and wherein the controller having a processor configured to: determine a start time and an end time for application of the adhesive to the product based on the presence of the product received from the product detector, receive the amount of the adhesive flowing out of the flow outlet of the flow meter from the start time to the end time, and associate the amount of the adhesive with the product. determine a start time and an end time for application of the adhesive to the product based on the presence of the product received from the product detector, receive the amount of the adhesive flowing out of the flow outlet of the flow meter from the start time to the end time, and associate the amount of the adhesive with the product.