Thermal Mass Flow Meter
Thermal mass flow meters belongs to mass flow meters which mainly have two kinds of flow meters, one is thermal mass flow meters,and the other is Coriolos mass flowmeter for fluid.Thermal mass flow meters is initially designed for gas,but now fluid thermal mass flow meters are also available.
Some useful links
1.Patent about ABB thermal mass flow meters
http://www.freepatentsonline.com/7650783.html
From the links, it can know the information about ABB thermal mass flow meters.A thermal mass flow meter is disclosed with at least one heating element which is mounted on a holder and immersed into a vessel with a flowing medium, wherein the holder is subdivided into two zones of differing thermal conductivity, the holder substantially having a high thermal conductivity adjoined by a short zone of low thermal conductivity in which the heating element is arranged.
2.Fluid thermal mass flow sensor – Patent # 5792952 – PatentGenius
http://www.patentgenius.com/patent/5792952.html
A fluid thermal mass flow meter including a composite flow tube having four tubular segments of high thermal conductivity formed in a length of tube made of a material having a relatively low thermal conductivity, a thin film element formed on the surface of and extending around each of the four tubular segments, circuitry for incorporating the elements into a bridge circuit, and a housing for containing the flow tube, elements, and circuitry.
3.Battery powered thermal mass flow meter for gas
http://www-static.shell.com/static/ecomarathon/downloads/2011/americas/redycompact_hydrogen_flow_meters.pdf
Thermal mass flow meters with battery power or external supply. Alongside numerous other possible uses, the red-y compact becomes an affordable alternative …
4.The Usage Of A Thermal Mass Flow Meter
http://www.flowmeterbasics.com/thermal_mass_flow_meter.html
Using something as complex as a thermal mass flow meter may be enough to scare
5.Discuss thermal mass flow meters
Http://wiki.answers.com/Q/how_thermal_mass_flow_meter_calibrated
A site can ask the question of thermal mass flow meters and waiting for others’ help and replies
6.General information about thermal mass flow meters
en.wikipedia.org/wiki/thermal_mass_flow_meter
Can find some basic information about thermass flow meters,may be not professional,but you may learn it simply.