Model 100 Turbine Flo-Sensor for Gas Service
Source: McMillan Company
McMillan Series 100 Flo-Sensors are capable of measuring extremely low flow rates from 20 mL/minute up to 500 L/minute
McMillan Series 100 Flo-Sensors are capable of measuring extremely low flow rates from 20 mL/minute up to 500 L/minute (0.04 to 1000 SCFH). These sensors are suitable for a wide variety of industrial, commercial, and laboratory flow applications. Because of the low cost of these flow sensors, these units replace conventional glass tube and ball flow meters in many applications wherein an electrical signal proportional to flow rate is desirable.
The Model 100 Flo-Sensor uses a Pelton-type turbine wheel to determine the flow rate of the gas. Rotation rate of the turbine wheel is linear over a large dynamic range. The electro-optical system consists of a diode emitting infrared light, which is alternately reflected and absorbed from "spokes" deposited on the turbine wheel. The reflected light energy is detected by a photodiode, and thus electrical pulses are generated by rotation of the wheel.
Processing circuitry provides a D.C. voltage output proportional to the flow rate. For example, the output signal is 1.00 VDC at 20% of rated flow, 2.50 VDC at 50% of rated flow, and 5.00 VDC at 100% of rated flow.
When the gas flow rates exceed 5 L/minute (10 SCFH) the Model 100 Flo-Sensors utilize various shunts to permit operation at higher rates. These shunts divert a certain percentage of the total gas flow to bypass the sensor.
The Model 100 Flo-Sensor uses a Pelton-type turbine wheel to determine the flow rate of the gas. Rotation rate of the turbine wheel is linear over a large dynamic range. The electro-optical system consists of a diode emitting infrared light, which is alternately reflected and absorbed from "spokes" deposited on the turbine wheel. The reflected light energy is detected by a photodiode, and thus electrical pulses are generated by rotation of the wheel.
Processing circuitry provides a D.C. voltage output proportional to the flow rate. For example, the output signal is 1.00 VDC at 20% of rated flow, 2.50 VDC at 50% of rated flow, and 5.00 VDC at 100% of rated flow.
When the gas flow rates exceed 5 L/minute (10 SCFH) the Model 100 Flo-Sensors utilize various shunts to permit operation at higher rates. These shunts divert a certain percentage of the total gas flow to bypass the sensor.
McMillan Company, 7075 RR 2338, P.O. Box 1340, Georgetown, TX 78627-1340. Tel: 512-863-0231; Fax: 512-863-0671.