Calibration gas | mixed gas | reference gas

Sepehr Gas Kavian: +982146835980, +982146837072 and +989022734708

Calibration gas is a known concentration of a gas or mixture of gases used to calibrate analytical instruments, such as gas detectors and analyzers. It serves as a reference standard to ensure the accuracy of these instruments in measuring the target gas.

Calibration gas typically comes in pressurized cylinders and can be a single gas or a mixture of gases. The specific gas or mixture used will depend on the application.

Types of calibration gases

There are two main types of calibration gas:

• Zero gas: This is a gas that does not contain the target gas. It is used to set the baseline of the instrument.
• Span gas: This is a gas that contains a known concentration of the target gas. It is used to set the upper limit of the instrument’s range.

Calibration gas is essential for ensuring the safety and accuracy of gas detection and analysis. Regularly calibrating instruments with calibration gas helps to ensure that they are functioning properly and can detect dangerous gases at the appropriate levels.

Calibration gases are essential for ensuring the accuracy of gas detectors and analyzers. These instruments are used in a variety of applications, including:

• Industrial safety: To monitor for the presence of hazardous gases in workplaces.
• Environmental monitoring: To measure air quality.
• Fire safety: To detect the presence of combustible gases.
• Medical diagnostics: To measure blood gas levels.

Calibration gas uses

Calibration gases are specially formulated gas mixtures used to maintain the accuracy and precision of gas detection instruments. These instruments are employed in a wide range of industries, including:

• Manufacturing: To ensure quality control of products and processes that involve gases. For example, in inert atmosphere welding, calibration gases are used to make sure the oxygen levels are low enough to prevent oxidation of the weld.
• Oil and Gas: To monitor for leaks and ensure the safety of workers and the environment. Calibration gases are also used to ensure the accuracy of measurements of hydrocarbons and other gases in oil and gas production.
• Chemical Processing: To monitor for the presence of hazardous gases and ensure the safety of workers. Calibration gases are also used to ensure the quality of chemical products.
• Environmental Monitoring: To measure air quality and monitor for pollutants. Calibration gases are used to ensure the accuracy of measurements of pollutants such as ozone, nitrogen oxides, and sulfur dioxide.

Here are some of the specific applications of calibration gases:

• Setting baseline readings: This is the initial reading of an instrument in an environment free from the gas being measured.
• Checking device accuracy: Calibration gases are used to verify that a gas detection instrument is reading correctly. This is important to ensure that the instrument can detect leaks and other problems.
• Testing new sensors: Before a new sensor is put into service, it must be calibrated with a known concentration of gas.
• Leak detection: Calibration gases can be used to pinpoint the location of leaks in pipes and other equipment.

Calibration gases are available in a wide variety of mixtures, depending on the specific application. The most common calibration gases include:

• Carbon monoxide (CO)
• Carbon dioxide (CO2)
• Nitrogen dioxide (NO2)
• Hydrogen sulfide (H₂S)
• Methane (CH4)
• Oxygen (O2)
• Sulfur dioxide (SO2)
• Ammonia (NH3)

Produce of calibration gas

these gases are produced by specialized gas companies using two main methods: gravimetric and volumetric.

Gravimetric Method

The gravimetric method is based on the weight of the gas components. Here’s a breakdown of the process:

1. Component Weighing: High-precision scales are used to weigh out the exact amount of each gas component needed for the desired mixture.
2. Transfer and Mixing: The weighed components are then transferred into a mixing vessel, where they are combined.
3. Dilution: The mixture is diluted with an inert gas, such as nitrogen, to reach the final desired concentration.
4. Analysis: The final gas mixture is analyzed to ensure it meets the required specifications for accuracy and traceability.

Volumetric Method

The volumetric method relies on the volume of the gas components. The process involves:

1. Pressurized Containers: Each gas component is stored in a separate pressurized container.
2. Precise Measurement: The desired amount of each gas component is precisely measured using flow meters or pressure regulators.
3. Mixing Vessel: The measured gases are then transferred to a mixing vessel, where they are combined.
4. Analysis: Similar to the gravimetric method, the final gas mixture is analyzed to confirm it meets the specifications.

Both methods have their advantages and disadvantages. The gravimetric method is generally considered to be more accurate, especially for low-concentration mixtures. However, it can be more time-consuming and expensive. The volumetric method is faster and more cost-effective, but it may not be as accurate for low-concentration mixtures.

Regardless of the method used, calibration gas production requires strict quality control procedures to ensure that the final product meets the required specifications for accuracy, purity, and stability.

supply

Sepehr Gas Kavian company – with ISO17025 certificate and standard department’s reference laboratory – produces all kinds of calibration gases in gas cylinders with different volumes. It is also equipped with a test laboratory and a calibration laboratory, so it is able to test reference gases (calibration) by specialized devices to analyze all types of reference gases.

To buy different calibration gases with excellent and reliable quality along with a valid certificate, please contact +982146835980, +982146837072 and +989022734708.