WAFS 102 - Thermal Mass Flow Sensor

Careers DirectionsCall Us: +91-9655028715

Features of WAFS Series Flow Sensors :

100 : 1 turn down ratio in % ranges : 0.3-30 Nm/s, 0.6-60 Nm/s, 9.9-90 Nm/s, 12 – 120 Nm/s, 15-150Nm/s
Large LCD Screen with dual-line display and 3 setting button, Easy to read or set.
Low Cost Economical Model.
Online Data Logger Optional.
No Pressure Loss, Suitable for Pipe in any Shape with known sectional area.
For the insertion type, installation and maintenance can be finished online.
Measure the mass Flow and Standard Flow Directly.
High Accuracy Data Acquisition Circuit to ensure outstanding repeatability and accuracy of the meter.
Self Diagnosis Function Makes Trouble Shooting Easier.

WAFS — 102 Series Thermal Mass Flow meter is WiseAir 4.0’s latest technology specially designed for Air and N2 applications. It has more compact design, which means smaller enclosure and thinner insertion tube probe. Due to its small diameter insertion probe and shorter high-sensitive sensor, it can be used on pipes from DN25-DN500, or even larger pipe. In some higher pressure applications, it can be instaIIed/ removed without stopping the fluid, as the pipe is thinner, field engineers will be able to insert the meter to pipe very easily. Also, to full-fill the Energy Conservation Need in Compressed Air and N2 applications, WAFS-102 will be the most Cost Effective model in the market.

WAFS— 102 Series Thermal Mass Flow meter measures the Gas Moss Flow based on thermal diffusion theory. It has two RTDs as its sensors, one of which sense the velocity of the gas Flow (RH) and the other one will detect the temperature shift of the gas Flow (RMG). When the two RTD are in the gas Flow, the RH will be heated while the RMG will sense the temperature changing of the gas flow. More heat will be token away as the velocity of the gas Flow increases, so the temperature on RG will decline.

According to King’s law, the heating power P, the temperature difference AT (TRH—TRMG) and the Mass Flow rate are mathematical related.

P/AT- K1+ K2 f(Q)K3, the K1, K2, K3 are constants related to the properties of the gas. WAFS Series Thermal Mass Flow Meter is designed based on constant power measuring method, thus the RTD is heated in a consistent power and will be more durable and stable. That is why WAFS Flow meter has less problem of zero-off which may be caused by a function failure of RTD due to over-heated in long term.