Air Flow Measurement

CIH Equipment

Air Flow Meter Calibration

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Air Sampler and Flow Calibrator Calibration Services

Accurate air sampling is essential for any exposure assessment involving gaseous vapors or particulates. To determine airborne exposure concentration, the flow rate of your air sampler must be precisely calibrated. CIH Equipment specializes in calibrating portable airflow calibrators, which are crucial for ensuring accurate measurements and minimizing errors in air sampling.

Minimizing Air Sampler Flow Rate Error

Following OSHA and NIOSH guidelines, calibrating the flow rate of an air sampler with the sampling media in line is essential for accurate concentration calculations. At CIH, we calibrate air samplers using high-quality field flow calibrators like dry piston provers. Proper flow checks are performed before and after each sample to ensure reliable data, which is crucial for OSHA compliance and engineering controls. Many of our calibrators support single, continuous, and burst reading modes for versatile use in various applications.

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Flow Calibrator Calibration at CIH Equipment

CIH Equipment uses the MESA Laboratories ML800 primary piston prover for unmatched accuracy in flow calibrations. This positive displacement prover uses Proven DryCal Technology for quick and precise volumetric or standardized flow readings. With the ability to take up to 100 readings in an automatic sequence, the ML800 ensures that your field flow calibrator provides accurate, repeatable measurements.

Why Calibrate Your Flow Calibrator?

A properly calibrated field flow calibrator, when paired with a calibrated air sampler, offers the most accurate volume measurements. CIH Equipment minimizes error through low-uncertainty calibrations using the ML800 primary standard. Calibration is essential to account for issues such as piston stickiness, temperature variations, and equipment aging, all of which can affect accuracy. Our ISO 17025:2017 accredited lab ensures the highest precision.

Air Sampler Calibration Importance

Proper calibration of air samplers is critical for ensuring accurate airborne concentration data, whether for regulatory compliance or worker safety. CIH Equipment calibrates and maintains air samplers to operate at correct flow rates, ensuring clean pneumatic systems, reliable motors, and functioning fault sensors. Our lab adheres to ISO 13137:2013 standards, ensuring your air sampling pumps maintain flow stability and precision throughout their operation. Trust CIH Equipment for expert calibration services to keep your air sampling equipment performing at its best.

Flow Calibrator Calibration at CIH Equipment Company

CIH uses the MESA Laboratories ML800 primary piston prover for unmatched accuracy. The ML-800 is a positive displacement primary piston prover for gas flow measurements in either pressure or vacuum applications. Using Proven DryCal Technology, it combines the accuracy of a primary standard with unequaled speed and convenience. Volumetric or standardized flow readings are obtained with the push of a button. The ML-800 can be set to take flow readings manually, one reading at a time, or automatically in the continuous auto-read mode. The ML-800 can be programmed for up to 100 readings in an averaging sequence.

Why calibrate your field flow calibrator?

  • A calibrated field flow calibrator coupled with a calibrated air sampler provides the most accurate measure of volume.
  • CIH Equipment Company uses the Mesa Laboratories ML800 primary standard, has a very low uncertainty, and is considered the best in the business.
  • Field flow calibrators may be reading poorly due to piston stickiness, temperature, atmospheric pressure, age, and shock.
  • Flow calibration is in our A2LA scope of accreditation and error is minimized with our low uncertainties.
  • Range: 5 mLPM to 30 LPM

Air Samplers

An important component of sampling air is the sampler itself. Consider the error when calculating an airborne concentration based off of sampling results and comparing to a permissible exposure limit. The NIOSH or OSHA sampling and analytical technique stipulates precision of the method and standard error of the method. In the analytical portion, a filter must be weighed or digested, a sorbent tube desorbed and done so with a stated efficiency of the particular media and technique. When the mass quantity of the chemical becomes known, the exposure concentration is derived from the mass and the volume of air taken in. That is where the air sampler comes in. How much variation was there in the flow? Are the pneumatics gummed up? Does the battery allow for sampling the full shift? Does the sampler fault unnecessarily?

The importance of calibrating your Air Samplers

Whether to comply with standards or to determine safe concentrations for workers and the public to breathe, well maintained air samplers can mean the difference between accurate data and someone’s health. Government agencies such as OSHA and Center for Disease Control recognize proper maintenance as regular calibration at a specialized facility.

CIH Equipment will get your air sampler in top condition. We want to make sure that your air sampler, before it leaves our laboratory, can operate at the correct flow rates, the pneumatic system is clean, the motor is trustworthy, the battery lasts, and the fault sensors are in proper operating mode. Our air sampler laboratory is set up to determine flow range, static head pressure versus flow, and well-functioning fault sensors. Pneumatic systems are evaluated for function, wearable parts and NIST Traceable flow and pressure standards.

Personal sampling pumps must adhere to ISO 13137:2013, which sets limits for required flow stability, as well as maximum pulsation levels. The standard provides a comprehensive framework that specifies test methods to determine performance of air sampling pumps, and ensures environmental influences such as air pressure and temperature have a minimal effect on the accuracy of the sampled air, which in turn could affect sample results.

Special features of our air sampling pump:

  • Maintain steady state flow for accurate volumes
  • Assure that the air sampler works and stays functional throughout the entire testing period
  • Compliance with ISO 13137:2013
  • We are A2LA ISO 17025:2017 Accredited
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