Below is an example of our FAT installations for those “Hard to get” up stream distances and unknown profiles where you still need cross sectional coverage.
Master-Touch™ Series 9100MPNH Flow Meters
MPNH Series flowmeters are approved for use in ordinary locations (see specifications)
Inline style thermal mass flowmeters include a flow section that is usually specified to match the user’s flow conduit and is then plumbed directly into the process line. This design has the sensing elements mounted directly on the flow section for exposure to the process gas. Our inline style flow averaging thermal mass flowmeters are available in sizes from 2″ pipe through 4″ pipe and are provided with flanged end configurations, as required. Pipe sizes in excess of 4″ typically require insertion style thermal mass flow meters.
Remote style thermal mass flowmeters utilize two enclosures. One enclosure is mounted at the point of measurement on the flow section or on the probe assembly. This enclosure may be rated for either hazardous environments or for ordinary, non-hazardous environments, as necessary. The second (remote) enclosure is usually placed in a readily accessible location rated for non-hazardous conditions. (Contact the factory for information concerning remote explosion-proof enclosure). The remote enclosure includes the all of the electrical connections as well as the linearizing electronics and the display/keypad assembly.
Our patented Flow Averaging Tubes™ (FAT™) use the principle of convective heat transfer to directly measure mass flow, and are well suited to most applications with limited available straight run. In many installations, the up-stream straight run can be reduced to three diameters. The probe has a number of large diameter inlet ports along the length of the upstream impact surface. The pressure at each inlet port is averaged inside the tube to create the axial flow through the tube and across our flow sensor. The gas returns to the main flow stream through the ports located near the sensing elements. Anomalies in the actual flow profile or installations in non-circular ducts may still some require minor adjustment to achieve the best accuracy.
Certified to CSA/CUS Standards: Class 2252-03 & 2252-83 for Process Control Equipment in Ordinary Locations Only; CSA Enclosures Type 4X, IP66
Linear signal output
0–5 VDC & 4–20 mA (Flow and Temperature)
RS232 & RS485 Modbus RTU embedded
Optional HART or Profibus DP
LCD (flow rate, flow total, gas temperature)
Accuracy, including linearity (Ref.: 21°C)
±(1% of Reading + 0.5% of Full Scale + GTC)
±0.2% of Full Scale
Sensor response time
1 second to 63% of final value
Turn down ratio
100:1 @ 15 SFPM (.076 NMPS) Minimum Reading
Electronics PCB temperature range
-40° to 158°F (-40° to +70°C)
Environmental temperature range
-40° to 140°F (-40° to +60°C)
Gas temperature range
Gas temperature coefficient (GTC)
0.05% Full Scale/°C @ 40°–100°F (5°–40°C)
0.10% Full Scale/°C @ 100°–150°F (40°–65°C)
Pressure rating maximum
Input power requirement
24VDC @ 250mA
115 VAC 50/60 Hz optional
230 VAC 50/60 Hz optional
Flow Transmitter power requirements
5 watts maximum
316 Stainless Steel (Hastelloy optional)
Standard temperature & pressure (STP)
70°F & 29.92″ Hg (Air .075 lb./cubic foot)
NIST traceable calibration
NOTE: Specifications subject to change without notice.