Help with Air Flow Sensors specifications:
Instrument Style
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Instrument Style | |||
Your choices are... | |||
Insertion Probe Type | Inserted into the air flow, these instruments measure the effectiveness of ventilation by measuring air velocity. | ||
Flow Hood or Balometer | These instruments measure air volume flow at air supply or exhaust outlets. | ||
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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Features
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Measures Temperature | The air flow sensors also measures temperature. | ||
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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Time or Multi-point Averaging | Compensates for non-uniform air velocity across the duct cross-section. | ||
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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Temperature Compensation | Automatic adjustment of readings to account for sensitivity variation due to temperature fluctuation. | ||
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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Audible or Visual Alarm | Air flow sensor has audible or visual alarms to alert users to dangerous conditions. | ||
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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Selectable Range | The air flow sensor is equipped with selectable measurement ranges. | ||
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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Environment
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Operating Temperature | This is the ambient temperature range through which the device is designed to 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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Mounting
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Mounting | |||
Your choices are... | |||
Hand-held or Portable | Portable and/or applicable by hand operation. | ||
Fixtured or Permanent | Mounted or fixtured in place for long-running use. | ||
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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Measurement Type
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Air Velocity | Air velocity may be measured directly or calculated from the velocity pressure (e.g., FPM, m/s, etc.). | ||
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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Air Volumetric Flow | Air volume flow is the product of the air velocity and the duct cross-sectional area (e.g., CFM, SCFM, etc.). | ||
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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Air Pressure Differential | The velocity pressure is the difference between the total pressure and the static pressure (e.g., PSI, etc.). | ||
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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Technology Type
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Technology Type | |||
Your choices are... | |||
Thermal Anemometer | A body is heated up to a fixed temperature and then exposed to the air velocity. By measuring how much more air is required to maintain the original temperature, indication of the air speed is gained. The higher the air speed, the more energy required to keep the temperature at a set level. Based on the principle of wind chill factor. Hot wire, hot ball and thermistor probe types. | ||
Differential Pressure | Pitot tubes, averaging tubes and other velocity pressure measurement devices. The velocity pressure is the difference between the total pressure and the static pressure. A Pitot tube has two pressure sampling points (static pressure and back pressure). Used with a differential pressure transmitter, the difference between these pressures is a measure of the velocity. | ||
Vane Anemometer (Velometer) | A proximity switch counts the revolutions of the vane and supplies a pulse sequence, which is converted by the measuring instrument to a flow rate. Based on the conversion of rotation into electrical signal. Rotating and swinging vane types. | ||
Other Technology Type | Other unlisted, specialized, or proprietary technology type. | ||
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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Air Velocity Flow Range
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Air Velocity Range | Air velocity may be measured directly or calculated from the velocity pressure (e.g., FPM, m/s, etc.). | ||
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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Air Volume Flow Range
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Air Volume Flow Rate Range | Air volume flow is the product of the air velocity and the duct cross-sectional area (e.g., CFM, SCFM, etc.). | ||
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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Air Pressure Range
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Air Pressure Range | The velocity pressure is the difference between the total pressure and the static pressure (e.g., PSI, etc.). | ||
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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Accuracy
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Accuracy | Accuracy is the degree of uncertainly which the measured value agrees with the ideal value. Accuracy is measured in a percentage of the full scale range of the instrument. | ||
Search Logic: | All matching products will have a value less than or equal to the specified value. | ||
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Output Options
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Output Options | |||
Your choices are... | |||
Analog Voltage | Outputs an analog voltage signal | ||
Analog Current | "Transmitter" Option; (e.g., 4-20 mA) | ||
Frequency or Modulated Frequency Output | Frequency or modulated frequency output (Ex. sine wave, pulse train, AM, FM). | ||
Switch or Alarm Signal | "Output" is a switch or alarm signal. | ||
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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