Integrated air flow sensor and meter
A Flow Indicator Totaliser (Totalizer) is a device that measures electrical signal from a flow sensing device flow sensor/ flow meter. This electrical signal can be 4-20mA or 12VDC / 24VDC pulse type. A Flow Indicator Totaliser(Totalizer) scales this signal in terms of M^3/ Hr, Kltr/ Hr, Kg/Hr etc. and displays it. This is instantaneous flow rate. The Flow Indicator Totaliser (Totalizer) integrates it to calculate cumulative flow.
Now-a-days most of the Flow Indicator Totaliser (Totalizer) are microcontroller based. They have facilities of serial communication to connect to SCADA/ PLC/ DCS, relay output based of Flowrate or totaliser, totaliser reset, retransmission of flowrate signal to other devices. Flow totalisers / totalizers accept signal from various types of flowmeters like ultrasonic, electromagnetic, differential pressure transmitter on orifice plate, turbine type etc.
Flow totalisers / totalizers are mostly used in Chemical and process industries, public water distribution system, effluent treatment plants, petrol pumps etc.
Flow rate range:- 10, 25, 50,100 l/min.
Minimum unit setting:- 0.01 l/min. (0.1 l/min when the flow rate range is 25, 50, 100 l/min.)
Repeatability:- ±1%F.S. or less.
Flow adjustment valve is integrated. (Reduced piping and space saving)
Response time:- Either 50 milli sec., 0.5 sec., 1 sec. or 2 sec. can be chosen.