Help with Flow Transmitters specifications:
Output Options
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| Electrical Output | |||
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| Analog Current | Analog current levels (transmitters) such as 4 – 20 mA are suitable for sending signals over long distances. A current is imposed on the output circuit proportional to the measurement. Feedback is used to provide the appropriate current regardless of line noise and impedance. | ||
| Analog Voltage | Analog voltage outputs are simple, usually linear functions of the measurement. | ||
| Frequency | Frequency or modulated frequency outputs include amplitude modulation (AM), frequency modulation (FM), sine waves, and pulse trains. | ||
| Switch | The output is a change in state of a switch or a relay. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Interface Options | |||
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| Serial / Digital | Flow meters can provide signal outputs in serial, parallel, Ethernet, or other digital formats. Devices with a serial/digital interface can provide a process variable for measurement, but do not include communication lines. | ||
| Network / Fieldbus | Devices output signals that are formatted according to an industrial fieldbus protocol such as CANbus, PROFIBUS®, or SERCOS; a networking protocol such as Ethernet; or another industrial automation protocol. PROFIBUS is a registered trademark of PROFIBUS International. | ||
| Other | Other unlisted, specialized, or proprietary interface options. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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User Interface
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| Display | |||
| Your choices are... | |||
| Analog Display | Data is displayed with an analog meter or simple visual indicator. | ||
| Digital Display | Device uses digital, numerical, or application-specific displays. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Front Panel Interface | |||
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| Knobs / Switches | Settings are made with dual-in-line package (DIP) switches, knobs, jumpers, and/or other simple settings. | ||
| Digital Front Panel | Devices have a digital front panel and are setup or programmed with a digital keypad and displays, menus, or similar display functions. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Computer Controllable | Devices can be programmed and/or remotely controlled with a computer. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Flow Meter Type
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| Flow Meter Type | |||
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| Mass Flow Meter | The flow sensor or meter measures flow rate in units of mass flow such as pounds per minute (lbs/min), or kilograms per hour (kg/hr). | ||
| Velocity Flow Meter | The flow sensor or flow meter measures flow rate in units of velocity such as feet per second (ft/sec), or feet per hour (ft/hr). | ||
| Volumetric Flow Meter | The flow sensor or meter measures flow rate in units of volumetric flow such as milliliters per minute (mL/min), or gallons per hour (gal/hr). | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Media Specifications
Typically, the process media type is determined by the meter technology. For additional guidance, refer to information about meter technologies, or consult the manufacturer.
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| Process Media Type | |||
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| Gas | Devices measure the flow of gases. | ||
| Liquid | Devices measure the flow of liquids. | ||
| Steam | Devices can accommodate mixed-phase materials such as steam. | ||
| Suspended Solids / Slurries | Devices can accommodate liquids with suspended solids (slurries). Typically, the material types are determined by the meter technology chosen. For additional guidance, refer to information about meter technologies or consult the manufacturer. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Media Temperature Range | Media temperature range is the maximum media temperature that can be monitored. It is usually dependent on construction and liner materials. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Operating Performance
A meter's performance can be determined by its turndown ratio. Turndown ratio is the effective dynamic or operating range of the flow meter. For example, if a 500 SCCM flow rate device has a turndown ratio of 50:1; it will operate effectively and resolve flow down to 10 SCCM. If the same device has a turndown of 100:1, then it will resolve effectively to 5 SCCM.
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| Mass Flow Rate | Mass flow range is the range of flow in mass/time. This specification applies to mass flow sensors and meters. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Velocity Flow Rate | Velocity flow range is the range of flow in distance/time. This specification applies to velocity flow sensors and meters. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Gas Volumetric Flow Rate | Gas volumetric flow rate range is the range of flow in volume/time. This specification applies to volumetric flow sensors and meters for gases. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Liquid Volumetric Flow Rate | Liquid volumetric flow rate range is the range of flow in volume/time. This specification applies to volumetric flow sensors and meters for liquids. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Operating Temperature | The temperature range over which the device must operate. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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| Operating Pressure | Operating pressure is the maximum head pressure of the process media that devices can withstand. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Features
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| Features | |||
| Your choices are... | |||
| Audible or Visual Alarms | Instruments have audible or visual alarms to alert users to dangerous conditions. | ||
| Averaging / Multi-Insertion | Multi-insertion flow meters determine the flow rate by taking flow rate measurements across several points in the flow path. | ||
| Controller Functions | Devices have or receive sensor input, provide control, (limits, PID, logic, etc.) and output a control signal. | ||
| Programmable | Typically, programmable meters include a built-in microprocessor. They can be adjusted electronically for different materials, ranges, outputs, etc. | ||
| Recorder / Totalizer Functions | Totalizer functions totalize the amount of material, media, or process variable controlled. A recorder function may be a datalogger that logs system or process variables and/or control commands for later viewing or analysis. A chart recorder that can plot (chart) flow history or give total flow for a given unit of time may also be available. | ||
| Sanitary | Devices are designed for use in sanitary environments, such as in medical or food processing applications. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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