flow sensor Articles

  • Desired Characteristics of a Thermal Mass Flow Sensor - Part 1 of 2

    This is part 1 of a 2 part blog on Thermal Mass Flow Sensor. We will describe the desired characteristics of a thermal mass sensor in Part 1 and Part 2 will discuss the operation of the 300 Series flow sensor (Patent #6,125,695) from Teledyne Hastings. A thermal mass flow meter consists of the following: Electronic Circuit Card Flow Sensor Bypass Shunt Base A cutaway is shown in the ...

  • Desired characteristics of a thermal mass flow sensor - Part 2 of 2

    This is part two of a two-part blog on Thermal Mass Flow sensors. In part one, we described the desired characteristics of a thermal mass flow sensor. In part two, we will discuss the operation of the 300 series flow sensor (Patent #6,125,695) and how its design addresses the desired traits. In our previous blog, we showed a cutaway of a thermal mass flow meter. Now let’s take an ...

  • The Fundamentals of the Air Sampler Calibration-Verification Process

    INTRODUCTION The calibration of an air sampling instrument using a reference air flow calibrator requires attention to scientific detail in order to establish that the instrument’s reported values are correctly stated and valid under the actual operating conditions of the air sampling instrument. DEFINITIONS For the purposes of this paper, the following definitions shall apply: Gas of ...

  • Water Flow Monitoring Helps Avoid Costly Fines

    Water Distribution Company Refines Pumping System Many water distribution companies use a similar process for Water Flow Monitoring: Collect water from a well with the help of water pumps, utilize a pond or reservoir to temporarily store the water and maintain a loading center to fill water trucks for transport. The problem is how to pump the maximum allowable volume of water on a day-to-day ...


    By CAS DataLoggers

  • Advances in Thermal Dispersion Mass Flow Meters - Part 2 Installation and Flow Calibration

    Abstract Part 1 of this two-part series describes the principle of operation of a new microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor and has a dry velocity sensor. Part 1 shows how this unique system provides automatic management of changes in gas selection, gas temperature, gas pressure, and outside temperature. This Part 2 ...


    By Sierra Instruments, Inc.

  • Industrial thermal mass flow meters Pt.1 -Pt.2 - measurement & control

    An industrial thermal mass flowmeter measures either the mass velocity at a point in a flowing gas or the total mass flow rate through a channel or pipe. Figure 1 shows a typical thermal mass flow sensing element. It consists of two sensors: a mass flow sensor and a temperature sensor, which automatically corrects for changes in gas temperature. Both sensors are reference- grade platinum ...


    By Sierra Instruments, Inc.

  • Controlling the addition of Chlorine into a Process

    There are several methods for controlling the addition of chlorine into a process. These methods include flow proportional injection, ORP (oxidation reduction potential) or a residual chlorine analyzer. Each method measures a different process characteristic. Depending on the specific type of process being controlled, there generally is a best choice for controlling the injection of either ...


    By Walchem, Iwaki America Inc.

  • How Does a Thermal Flowmeter Work?

    A thermal flowmeter works by measuring the total mass flow rate of a fluid flowing through a pipe or duct. In a thermal flowmeter’s simplest working configuration, fluid flows past a heated thermal sensor and a temperature sensor. As the molecules of the fluid flow past the heated thermal sensor, heat is lost to the flowing fluid. The thermal sensor cools down while the temperature sensor ...


    By Sierra Instruments, Inc.

  • Property management company saves $100,000 with water flow sensor - Case Study

    SUMMARY Joanna Jackson is a Building Performance Specialist with Minto Apartments, an organization that manages 8,800 rental apartment units in seven cities across Canada. After relying on municipal water bills to manage water consumption and costs, Joanna installed the Flowie water flow sensor at 12 buildings and began receiving minute-by-minute water use data. A few months after installation, ...


    By Alert Labs Inc.

  • Online discharge measurement with horizontal doppler-flow sensor

    Background The regional authority responsible for the barrages in the Free State of Saxony is in charge of the water management of the Rötha. Reservoir. This reservoir is situated close to the river Pleiße, from which the water is led over a weir into the reservoir.. Knowledge about the inflows of the reservoir is important for the water management there. So far, the rate of flow at the ...


    By OTT HydroMet

  • Why Measure Flue Gas Velocity?

    Many industrial processes release flue gases to the atmosphere. Under European Directives the majority of those are classed as emission sources and therefore require continuous emission monitoring. European standards for monitoring pollutants and flow for CEMS (Continuous Emission Monitoring Systems) are already in place and other countries usually follow them to some extent. The CODEL VCEM5100 ...


    By Codel International Ltd

  • Alert Labs Expands Water Tech with Flowie-O & Shuttie Saving Water & Damage

    Flowie-O and Shuttie lower utility costs and minimize property damage for residential, multi-family, and commercial buildings. Water Flow Sensor: flowie-o Alert Labs announces the expansion of its water sensor technology to help more organizations reduce wasted water, property damage, and utility costs. Building on the success of the Flowie water flow sensor, Alert Labs has now expanded its ...


    By Alert Labs Inc.

  • Wastewater engineers go with the flow

    The efficiency of maintenance work has been improved by water treatment engineers employing Intellisonde monitors in their final effluent. Designed primarily to measure water quality, the Intellisondes also measure flow, and this reading is being used to detect the accumulation of debris that necessitates a maintenance visit. Wastewater treatment efficiency is often measured by the analysis of ...


    By Intellitect Water Ltd

  • Water Flow Sensor Saves School Board Thousands of Dollars

    Water flow sensor detects leaks, reduces water bills Watch video of Jessica Kukac, Environmental & Energy Systems Coordinator, Simcoe County District School Board explaining how Flowie saved her school tens of thousands of dollars in water costs. Summary Jessica Kukac is the Environmental & Energy Systems Coordinator with the Simcoe County District School Board (SCDSB). She oversees ...


    By Alert Labs Inc.

  • Thermal mass flow meter for Compressed air solution - Case study

    iCenta delivered the IC-MCF Air Flow Meter complete with ancillary accessories. The IC-MCF air flow meter is indispensable for managing energy use with compressed air / nitrogen up to 12000 L/min (normal). The inexpensive mass flow meter provides precision and wide rangeability as a result of being micro-machined, integration of a micro-flow sensor and advanced channel-design technology. The ...


    By iCenta Controls Ltd

  • Water flow sensor saves school board thousands of dollars - Case Study

    SUMMARY Jessica Kukac is the Environmental & Energy Systems Coordinator with the Simcoe County District School Board (SCDSB). She oversees utility costs and monitors consumption of electricity, water, and natural gas for over 120 schools and public buildings, across 16 different municipalities. After installing the Alert Labs Flowie water flow sensor at one of the schools, she discovered a ...


    By Alert Labs Inc.

  • Advances in Thermal Dispersion Mass Flow Meters - Part 1 Principle of Operation

    Abstract This paper describes an advanced microprocessor-based thermal dispersion mass flow meter that uses four temperature sensing elements in its flow sensor instead of the traditional two elements and has a dry velocity sensor that uses no potting materials instead of the traditional potted velocity sensor. This unique new mass flow meter automatically manages changes in gas selection, gas ...


    By Sierra Instruments, Inc.

  • How to Read a Water Meter in the USA

    Water meter reading doesn't have to be complicated. The first thing you need to do is locate your water meter. If you live in the Northern United States where winter temperatures drop below 32 degrees Fahrenheit, you might be surprised to know that it's actually in your house. Check your basement near your furnace or hot water heater. In colder regions of the United States, water meters are ...


    By Alert Labs Inc.

  • Cost-effective sensors placement and leak localization – the Neptun pilot of the ICeWater project

    This paper extends previous research to analytically identify leaks within a water distribution network (WDN), by combining hydraulic simulation and network science based data analysis techniques. The WDN model is used to run several ‘leakage scenarios’, by varying leak location (pipe) and severity, and to build a dataset with corresponding variations in pressure and flow, induced ...


    By IWA Publishing

  • Calibration using 5 flow sensors saves the effort of extensive reconstruction measures

    "Abwasserzweckverband Breisgauer Bucht", a municipal association for sewage treatment in the south of Germany, operates a central wastewater treatment plant for its members (29 communities and cities). The WWTP covers a catchment area of 650km² and its treatment capacity is 600.000 population equivalents. The plant is treating wastewater from 375.000 residents as well as from industry and ...


    By NIVUS GmbH

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