A thermal mass flow meter is a precision instrument that directly measures gas mass flow using heat transfer principles. Unlike other flow measurement technologies, thermal mass flowmeters don’t require additi
The components of a basic thermal mass flow meter include two temperature sensors and an electric heater between them. The heater can protrude into the fluid stream (Figure 1), or can be external to the pipe (Figure 2). In the direct-heat version, a fixed amount of heat (q) is added...
A thermal mass flow meter measures the gas mass flow and consumption of gases for commercial, industrial, and municipal functions.
THERMAL MASS FLOW METER WORKING ACCORDING TO THE DIFFERENTIAL PRINCIPLE OF ELECTRICITYThe disclosed mass flow transducer is of the type including a balanced bridge comprising two, substantially identical, thermal elements forming two sides of the bridge between the top and the bottom of the bridge, ...
The Single Post Dielectric Resonator (SiPDR) operating at 5 GHz combine with Microwave Frequency Q-Meter (QWED) were used for volume resistance measurements. The samples of size 3 × 3 × 0.1 cm were measured. The operating range of measurement for the specific type of resonator was 10–5÷...
Working principle Combining the plane heat source method for accurately measuring the skin thermal conductivity, the device is based on a modified single-heat-flux method to extract the body surface temperature (Tbottom, Fig.1d) and core temperature (Tcore-esti, Fig.1d) by monitoring the tempera...
Rather than employing a conventional x-y-axis approach with a fixed f-theta lens for beam deflection and focus, its optical system utilizes a 3-axis galvanometer scanner equipped with a linearly motorized beam expander lens. This additional z-axis enables a dynamic focus variation of the laser...
1.A MEMS time-of-flight thermal mass flow meter comprising:a micromachined time-of-flight (TOF) thermal mass flow sensor;an insertion type of flow channel package; anda single frequency drive functionality circuit;wherein,said micromachined time-of-flight thermal mass flow sensor has a suspending...
96,97,98and99. . . MOS transistor; 100. . . output mechanism; 101. . . amplifier; and 102. . . second current limit mechanism. Previous Patent:THERMAL MASS FLOW METER AND MASS FLOW CONTROLLER Next Patent:FLUID FLOW MONITORING SYSTEM...
to aperture ratio, (f/D). For example a 20 meter aperture mirror segment with a focal length of one kilometer has an f/D of 500, which is very large. At such large ratios, spherical surfaces are practically indistinguishable from parabolic surfaces, and are easily formed to high accuracy....