Overview
Enviro Test Construct insertion thermal mass flow meter was developed to measure larger flow rates. It consists of a thin-walled capillary tube and two externally wound self-heating resistance temperature detectors (RTDs) that both heat the tube and measure the resulting temperature rise. The sensor is placed in a bypass around a restriction in the main pipe and is sized to operate in the laminar flow region over its full operating range. When there is no flow, the heaters raise the bypass-tube temperature to approximately 158 °F (70 °C) above ambient temperature. Under this condition, a symmetrical temperature distribution exists along the length of the tube. When flow is taking place, the gas molecules carry the heat downstream, and the temperature profile is shifted in the direction of the flow. A Wheatstone bridge connected to the sensor terminals converts the electrical signal into a mass flow rate proportional to the change in temperature.
Features
- Has OEM, ODM, OBM customized support
- gas as a medium
- 5% accuracy
- Backlight graph LCD display
Technical specification
| Nominal Diameter | 0.98 in (25 mm) |
| Output signal | 4 mA to 20 mA, RS 485, HART |
| Flange Connection | DN 15 to DN 2000 |
| Pressure | 1.6 Mpa to 6.4 Mpa |
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