Thermal Flowmeters use a constant temperature differential (ΔT) technology to measure mass flow rate of air and gases. The thermal mass flow sensor consists of two Resistance Temperature Detectors (RTD’s).
FLOW TRANSMITTERS
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FT2A
FT2A-09I-SS-ST-E4-BO-G4
BASIC DESCRIPTION
TYPE : INSERTION TYPE
PROBE LENGTH : 9" (INCH)
SENSOR MATERIAL :
- WETTED PARTS (SENSOR, PROBE) : 316 SS
SENSOR TYPE : STANDARD SENSOR (- 40 ~ 120 ℃)
ENCLOSURE : PROOF SENSOR J-BOX
POWER : 85 TO 264VAC
BUS OPTIONS : NO COMMUNICATION BUS
GAS CALIBRATION : AIR, CO2, H2, CH4, NATURAL GAS, O2: MF ABOVE 1000 SCFM (1700 NM3H)
PRINCIPLE
*Reference RTD measures temperature of the gas
*Power to the heated element is regulated by the electronics
*A constant ΔT is maintained
*As mass flow increases, the gas molecules remove heat from the heated element
*Sensing the ∆T reduction, the electronics adds power to maintain a constant ∆T.
*The amount of power applied to the heated element is proportional to the mass flow rate
*The microprocessor linearizes these signals
APPLICATION
*Waste Water Treatment Plants (WWTP)
*Aeration Air
*Bio Gas
*HVAC/Building Automation
*Natural Gas and Air Applications
*Boiler, Furnace, Oven manufactures etc.