Leomi Instruments - FlowMeter Blog

Are you able to find a reliable manufacturer of Insertion Thermal Mass flow meter with an In-house calibration facility in INDIA? Facing problem in validating/calibration of your existing Insertion Thermal Mass flow meter, or Air velocity Instruments? THEN, THIS ARTICLE IS FOR YOU. LEOMI has developed ways to optimize your existing air & gas flow measurement systems. LEOMI has newly commissioned India’s first in-house latest State-of-the-art Wind Tunnel, Made in Germany for Air Velocity Calibration and anemometer calibration services. It is certified as per ISO-17025 and DAkkS Germany traceability for air flow velocity ranges from 0.2 m/s to 75 m/s with flow uniformity of ±0.2%. The wind tunnel is constructed according to the Göttinger-type is a Closed designed circular tunnel with 180mm Nozzle diameter with 320mm open working section. Göttinger-type may be operated optionally using a closed section of measurements. The design requires low blower power and silence than other Eiffel

  This article talks about the basics of flow profiles, installation criteria, end-user application considerations, and how to use flow conditioning to improve flowmeter's accuracy in areas where a sufficient flow profile isn't possible. Number- 1: Understanding velocity profile Inside a pipe, fluids, such as gas, flow at different speeds. When gas flows through a circular pipe, particles in contact with the surface of the pipe wall come to a halt (W0), forming a boundary layer. To maintain the mass flow rate through the pipe, the gas velocity in adjacent layers slows due to friction and the gas velocity in the midsection increases at the center is (Wmax). The velocity profile is the velocity distribution through the tubing. The fully developed velocity profile is almost parabolic, whereas the turbulent profile is almost flat. It is possible to determine velocity anywhere within the pattern by understanding the velocity profile. Number- 2: ‘Installation location is critical’ Th

Thermal mass flow technology is evolving and removing some of the challenges faced e two design working principles:     Constant Temperature Anemometry   The constant-temperature sensor design maintains a constant temperature differential between a heated sensor and a reference sensor; the amount of power required to maintain the differential is measured as an indication of the mass flow rate. Constant-temperature thermal mass flowmeter currently popular with features as below: Active  High-frequency response  The low electronic noise level Immunity from sensor burnout when airflow suddenly drops  High rangeability Compatible with various RTD Pt-100 sensors, such as hot thin film, wire wound, etc.  Applicability to gas flows     Constant Power Anemometry   Constant power sensor design maintains constant power between two temperature sensors which will provide a flow rate proportional to the temperature of the gas flows. This design is less popular and very limited usage due to technica