Gas Purity and Analytical Instruments

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Brief Description

Gas Purity and Analytical Instruments are specialized sensors and systems used to measure the concentration of specific components (like O2, CO2, H2S, Moisture) within a gas stream for safety, process control, and product quality.

In-depth Overview

Measurement techniques vary widely, including zirconium oxide sensors for high-temperature O2, infrared (IR) for CO2 and hydrocarbons, and electrochemical cells for trace H2S and O2. These instruments often require a dedicated Sample Conditioning System to filter, cool, and regulate the gas sample before it reaches the analyzer . Applications range from ensuring safety in toxic environments to certifying the high purity of industrial and medical gases.

Specification

Parameter	Details
Measurand	O2, CO, CO2, NOx, SO2, H2S, Moisture (ppm or % Vol)
Technique	Electrochemical, NDIR (Non-Dispersive IR), Zirconia, TCD (Thermal Conductivity)
Measurement Range	ppm (parts per million) to 100% Vol
Output Signal	4−20mA, Modbus, or Ethernet
Enclosure	NEMA4X or IP66 (often with Ex-proof options)
Sample System	Required for cooling, filtering, and pressure regulation
Accuracy	High precision, typically ±1% of range
Calibration	Requires regular calibration with certified standard gases

Applications

Combustion Control: O2 analysis in boilers and furnaces to optimize efficiency and reduce emissions.
Industrial Gas Certification: Monitoring moisture and trace impurities in high-purity gases (e.g., Nitrogen, Argon, Helium).
Environmental Monitoring: Measuring SO2 and NOx emissions from stacks and incinerators.
Natural Gas Processing: Monitoring H2S (sweetening) and CO2 content.

Key Advantages

Process Optimization: Real-time analysis allows for immediate adjustment of combustion or chemical reactions, saving cost.
Regulatory Compliance: Essential for reporting and controlling emissions as mandated by environmental agencies.
Product Quality: Guarantees the required purity levels for end products (e.g., medical gases, semiconductor materials).
Safety: Early detection of toxic or explosive gases like H2S and CH4.

Payment and Shipping

We accept secured international payments via T/T and L/C. Analytical systems are complex and highly customized; lead times are typically 6-10 weeks. Due to the sensitivity of the internal sensors and optics, these are shipped in highly robust, shock-mounted packaging. Installation, commissioning, and training services can be arranged separately.

Frequently Asked Questions

Q: What is the main function of the sample conditioning system?
A: The sample system cleans, filters, cools, and regulates the pressure and flow of the gas before it enters the sensitive analyzer cell. This protects the analyzer from damage, maintains measurement stability, and ensures the sample gas is representative of the process.

Q: Why are gas analyzers required to be calibrated with certified gas?
A: Analytical sensors, especially electrochemical and optical types, can drift over time. They must be periodically checked and adjusted using a certified calibration gas mixture (NIST traceable) to ensure the readings remain accurate within the specified tolerance.

Q: How does NDIR technology work?
A: NDIR (Non-Dispersive Infrared) analyzers work by passing infrared light through a gas sample. Gases like CO2 and CO absorb specific wavelengths of IR light. By measuring the decrease in light intensity, the analyzer determines the concentration of the target gas.

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Gas Purity and Analytical Instruments Manufacturers

Wuxi Huihua Special Instrumentation Co., Ltd. was established in December 2001, the registered capital is 5 million yuan, the existing staff of more than 50 small and medium-sized joint-stock enterprises.
The company specialises in the production of various types of special instruments, alternative to the localisation of imported instruments.To seismic pressure gauge, seismic electric contact pressure gauge, stainless steel pressure gauge, diaphragm corrosion-resistant pressure gauge, marine pressure gauge and other series as the main products. On the basis of field instruments, we have developed various kinds of pressure transmitters, pressure controllers, digital pressure gauges and so on. There are more than 30 series and 3000 specifications. Products are widely used in petroleum, chemical, paper, metallurgy, mining, chemical fibre, electric power, food, environmental protection, rubber and plastic, hydraulics and many other industries, and more than 2,000 domestic customers to establish a friendly relationship with the national large and medium-sized enterprises to establish a good partnership, won the majority of users praise, and set up a corporate brand image.