QRD-210 Thermal Conductivity Hydrogen Analyzer

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QRD-210 Thermal Conductivity Hydrogen Analyzer

Product ID：HQGYqing006

Price: Please inquire PDF Format

Supply Ability:50SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberQRD - 210

Brand NameBJXIBI

Payment TermsTT，PAYPAL，Alibaba.com Pay

QRD-210 Thermal Conductivity Hydrogen Analyzer

Product Introduction
The QRD-210 Thermal Conductivity Hydrogen Analyzer is designed for continuous measurement of hydrogen concentration in mixed gases. It operates by measuring differences in thermal conductivity between gases, allowing hydrogen concentration to be determined when the background gas composition remains sufficiently stable.
Hydrogen has a substantially higher thermal conductivity than common background gases such as nitrogen and oxygen, making thermal conductivity analysis suitable for hydrogen concentration monitoring in various industrial processes.
With configurable measurement ranges, analog output, and optional serial communication, the QRD-210 supports continuous gas analysis in chemical plants, power stations, nuclear facilities, steel production, laboratories, and hydrogen production systems.

Performance Features
• Thermal conductivity measurement: Determines hydrogen concentration from differences in gas thermal conductivity.
• Continuous automatic analysis: Supports ongoing monitoring of hydrogen in mixed gases.
• Multiple measurement ranges: Available ranges include 0–1%, 0–10%, 0–100%, 35–75%, 40–80%, 75–100%, and 90–100%.
• Customizable range: Other measurement ranges can be configured according to user requirements.
•   Fast response: Response time is less than 15 seconds.
• Stable measurement performance: Zero drift and span drift are each specified at ≤±2% FS over seven days.
•   Flexible signal output: Provides 0–20 mA or 4–20 mA output.
•   Optional digital communication: RS485 or RS232 is available as an option.
• Straightforward maintenance: Simple instrument structure supports convenient routine maintenance.

Working Principle
The QRD-210 measures hydrogen concentration based on the difference in thermal conductivity between hydrogen and the other gases in a mixture.
A gas sample passes through the analyzer's thermal conductivity measuring system. The instrument detects the thermal conductivity of the sample and converts the measurement into a hydrogen concentration value using its calibration.
Because hydrogen's thermal conductivity is much higher than that of many common gases, changes in hydrogen concentration produce measurable changes in the mixture's thermal conductivity. The method works best when the composition of the background gas remains stable or is otherwise accounted for during calibration.
The resulting concentration data can be transmitted through an analog current output or, optionally, through RS485 or RS232 communication for integration with compatible monitoring systems.

Technical Specifications

Parameter	Specification
Model	QRD-210
Measurement principle	Thermal conductivity
Target gas	Hydrogen (H₂) in mixed gases
Measurement ranges	0–1%, 0–10%, 0–100%, 35–75%, 40–80%, 75–100%, 90–100%
Custom measurement range	Available on request
Zero drift	≤±2% FS / 7 days
Span drift	≤±2% FS / 7 days
Linearity error	±2% FS
Repeatability	≤0.5%
Response time	Less than 15 seconds
Analog output	0–20 mA or 4–20 mA
Digital communication	RS485 / RS232, optional
Ambient temperature	5–45°C
Power supply	(220 ± 22) VAC, (50 ± 0.5) Hz
Power consumption	120 W
Weight	Approximately 8 kg

FS means full scale. Confirm the selected measurement range, output configuration, and gas background before ordering.

Application Scenarios
• Ammonia synthesis plants: Monitoring hydrogen concentration in gas mixtures during ammonia production.
• Thermal power plants: Monitoring hydrogen concentration in hydrogen-cooled generator systems.
• Nuclear power facilities: Supporting hydrogen monitoring in containment environments and hydrogen-cooled systems, subject to site-specific safety and certification requirements.
• Steel production: Analyzing hydrogen in blast furnace gas and other industrial gas mixtures where the measurement principle is suitable.
• Gas production facilities: Checking hydrogen concentration or purity in gas production and processing systems.
• Laboratories: Measuring hydrogen concentration in combustion experiments and gas research.
• Industrial process monitoring: Providing continuous hydrogen concentration data for compatible control and monitoring systems.

QRD-210 vs. Other Hydrogen Analysis Methods

Comparison Item	QRD-210 Thermal Conductivity Analyzer	Electrochemical Hydrogen Analyzer	Gas Chromatograph
Measurement principle	Thermal conductivity differences	Electrochemical response	Chromatographic separation and detection
Primary function	Continuous hydrogen concentration monitoring	Depends on sensor design and target range	Analysis of individual gas components
Continuous monitoring	Supported	Supported by suitable models	Depends on system configuration
Response time	Less than 15 seconds	Depends on sensor and model	Depends on sampling and analysis cycle
Output	0/4–20 mA; optional RS485/RS232	Depends on model	Depends on model
Background gas sensitivity	Background composition must be sufficiently stable or accounted for	Depends on sensor chemistry and interfering gases	Can separate multiple gas components
Typical applications	Industrial process gas and hydrogen cooling systems	Suitable hydrogen detection and monitoring applications	Detailed gas composition analysis

Frequently Asked Questions
Q1: What does the QRD-210 Hydrogen Analyzer measure?
It measures hydrogen concentration in mixed gases using the thermal conductivity method.
Q2: What measurement ranges are available?
Listed ranges include 0–1%, 0–10%, 0–100%, 35–75%, 40–80%, 75–100%, and 90–100%. Other ranges can be configured according to user requirements.
Q3: How fast does the analyzer respond?
The specified response time is less than 15 seconds.
Q4: What is the measurement drift?
Both zero drift and span drift are specified at no more than ±2% of full scale over seven days.
Q5: Does the QRD-210 support digital communication?
Yes. RS485 and RS232 communication are available as optional configurations. The standard output includes 0–20 mA or 4–20 mA.
Q6: Can it monitor hydrogen in power plant cooling systems?
It is intended for hydrogen concentration monitoring in hydrogen-cooled systems. Confirm the required measurement range, installation conditions, and applicable safety requirements for the specific site.
Q7: Can it measure hydrogen purity?
It can measure hydrogen concentration within the selected range. Accurate purity assessment depends on the gas mixture, calibration, and background composition.
Q8: Why does background gas composition matter?
The analyzer infers hydrogen concentration from the thermal conductivity of the gas mixture. Changes in other gas components can also affect thermal conductivity and may influence the result.
Q9: What power supply does the instrument require?
The specified supply is 220 VAC ±22 V at 50 Hz ±0.5 Hz, with a rated power consumption of 120 W.

Frequently Asked Questions
Q1: What does the QRD-210 Hydrogen Analyzer measure?
It measures hydrogen concentration in mixed gases using the thermal conductivity method.
Q2: What measurement ranges are available?
Listed ranges include 0–1%, 0–10%, 0–100%, 35–75%, 40–80%, 75–100%, and 90–100%. Other ranges can be configured according to user requirements.
Q3: How fast does the analyzer respond?
The specified response time is less than 15 seconds.
Q4: What is the measurement drift?
Both zero drift and span drift are specified at no more than ±2% of full scale over seven days.
Q5: Does the QRD-210 support digital communication?
Yes. RS485 and RS232 communication are available as optional configurations. The standard output includes 0–20 mA or 4–20 mA.
Q6: Can it monitor hydrogen in power plant cooling systems?
It is intended for hydrogen concentration monitoring in hydrogen-cooled systems. Confirm the required measurement range, installation conditions, and applicable safety requirements for the specific site.
Q7: Can it measure hydrogen purity?
It can measure hydrogen concentration within the selected range. Accurate purity assessment depends on the gas mixture, calibration, and background composition.
Q8: Why does background gas composition matter?
The analyzer infers hydrogen concentration from the thermal conductivity of the gas mixture. Changes in other gas components can also affect thermal conductivity and may influence the result.
Q9: What power supply does the instrument require?
The specified supply is 220 VAC ±22 V at 50 Hz ±0.5 Hz, with a rated power consumption of 120 W.