Thermatel® TA2
Mass Flow Transmitter

Thermatel Model TA2 Thermal Mass Flow Transmitter provides reliable mass measurement for air and gas flow applications. The powerful, yet easy to use, electronics are contained in a compact explosion proof enclosure. The TA2 is available with both insertion probes as well as flow body design for smaller pipe sizes. The TA2 offers excellent performance at an exceptional value.

The TA2 offers the user the ability to verify calibration in the field reducing the need for periodic recalibration.

Measurement Principle:
Thermatel Model TA2 mass flow transmitter measures mass flow by detecting heat dissipation from a heated surface. The sensor contains two mass balanced elements with precision matched RTDs. The reference sensor measures the process temperature (up to +400° F [+200° C]); the second RTD measures the temperature of the heated sensor. The power to the heater is varied to maintain a constant temperature difference above the reference temperature.

There is an inherent non-linear relationship between power and mass flow. The microprocessor in the TA2 compares the power against the calibration curve and converts the power requirements to the mass flow rate. Temperature is also measured to provide temperature compensation of the mass flow over the operating range of the instrument.

Features:

• Direct mass flow measurement of air and gas
• Excellent low flow sensitivity
• Process temperatures to +400° F (+200° C)
• Rotatable housing
• FM/FMc/ATEX approvals
• Resettable and non-resettable totalizers

Applications:

• Combustion air
• Compressed air/gas
• Natural gas
• Digester/Biogas
• Hydrogen lines

Options:

• Pulse and second mA output for temperature
• Plug in display with keypad
• HART/AMS/PACTware communications
• Remote electronics

The SMC Alsonic DSP series

is a fixed-mount, transit-time ultrasonic flowmeter with clamp-on transducers for non-invasive liquid measurement. This device uses patented "fine time measurement technology", making use of ultrasonic beams that can measure at pico-seconds time intervals. This rapid array of measurements enables accurate, drift-free flow rate data in liquids that contain a second phase of entrained solids or gas bubbles. The use of DSP technology enables "Cross Correlation" of ideal signals to cancel extraneous noise signals, and create a three-dimensional cross section of the velocity distribution profile of the medium flowing through the pipe. DSP technology also enables the use of "FFT (Fast Fourier Transforms)" in order to generate the two signals at the same frequency; thereby increasing the signal-to-noise ratio for accurate, drift-free flow measurement in liquids.

 

Click to read our SMC ALSONIC DSP Series brochure...