Three gas-mixture measurement ranges
Configured ranges cover CO₂ in air (0–100% Vol), H₂ in CO₂ (0–100% Vol) and H₂ in air (75–100% Vol). Select the correct gas mixture for the application.
Product Image7866+7872D H2 Purity Analyzer
GENERATOR HYDROGEN PURITY ANALYZER
7866+7872D H2 Purity Analyzer
Thermal conductivity analysis•Three binary-gas ranges•Temperature compensation•Auto-drain and safety bypass
Measurement rangesH₂ in air: 75–100% Vol; H₂ in CO₂: 0–100% Vol; CO₂ in air: 0–100% Vol
Accuracy±2% F.S. (standard binary gas mixtures)
Sample flow rate0.5 SCFH
Response time (H₂)T63: 13 s; T90: 23 s
Output4–20 mA, factory setting for H₂-in-air range
Explosion-proof ratingEx d IIC T6
HOW THE PRODUCT WORKS
Hydrogen purity and gas replacement monitoring for generators
The 7866+7872D H2 Purity Analyzer combines an analyzer and sampling system for monitoring generator hydrogen purity and gas replacement processes. It uses thermal conductivity measurement for standard binary gas mixtures, with ranges for CO₂ in air, H₂ in CO₂, and H₂ in air. Measurement range and output configuration depend on the gas mixture being monitored.
The system includes a sampling arrangement designed to support on-site calibration, wide-range temperature compensation, automatic drainage and a safety bypass. A local 4–20 mA output is listed as the factory setting for the 75–100% H₂-in-air range, with a maximum load of 800 Ω. Confirm the target gas mixture and range, sampling flow, output mapping and site requirements when specifying the analyzer.
Plan a generator purity monitoring project
For a configuration review, share the generator model, gas composition, monitoring objective (purity measurement or gas replacement), required range, output interface and installation location. The analyzer is a large wall/floor-mounted system; confirm available space and applicable hazardous-area requirements before ordering. This helps confirm the right hydrogen purity analyzer for generator hydrogen monitoring and gas replacement.
Key product features
Thermal conductivity analysis
The analyzer uses thermal conductivity measurement for standard binary gas mixtures, with listed accuracy of ±2% F.S. under standard conditions.
Temperature compensation and explosion-proof sensing unit
Wide-range temperature compensation supports measurements in changing plant conditions; an explosion-proof sensing unit is specified.
Sampling system designed for on-site calibration
The sampling system supports site calibration to help maintain the analyzer in its intended operating condition.
Automatic drainage and safety bypass
Automatic drainage removes accumulated liquid from the system; a bypass path is provided for special operating conditions.
4–20 mA output for a defined range
The factory output setting maps 4–20 mA to 75–100% H₂ in air, with a maximum load of 800 Ω. Confirm output mapping for the required gas mixture.
APPLICATIONS
Typical applications
Generator hydrogen purity monitoring
Monitor hydrogen purity in generator systems and support routine plant operation.
Generator gas replacement processes
Track gas composition during generator purging and gas replacement operations.
Power plants
Integrate the analyzer and sampling system into power-plant hydrogen monitoring workflows.
Hydrogen-cooled generator maintenance
Support maintenance and monitoring teams with continuous gas-purity measurements for generator systems.
7866+7872D H2 Purity Analyzer technical specifications and integration requirements
| Parameter | Specification |
|---|---|
| Model | 7866+7872D (analyzer + sampling system) |
| Measurement principle | Thermal conductivity |
| Measurement ranges | CO₂ in air: 0–100% Vol; H₂ in CO₂: 0–100% Vol; H₂ in air: 75–100% Vol |
| Accuracy | ±2% F.S. for standard binary gas mixtures |
| Response time (H₂) | T63: 13 s; T90: 23 s |
| Response time (CO₂) | T63: 24 s; T90: 45 s |
| Output range | 4–20 mA, factory setting; corresponds to 75–100% H₂ in air; maximum load 800 Ω |
| Sample flow rate | 0.5 SCFH (manufacturer reference: approximately 500 mL/min) |
| Explosion-proof rating | Ex d IIC T6 |
| Dimensions | 800 × 400 × 1660 mm (L × W × H) |
| Weight | 131 kg |
Confirm the measuring range, output, power supply, and process conditions for your application when requesting a quotation.
What to include in your inquiry
For a project-specific 7866+7872D H2 Purity Analyzer quotation and application review, share your target measurement range, gas composition, operating temperature and humidity, pressure, installation method, required signal output, and project location. This helps our team assess the right configuration for your hydrogen monitoring or gas analysis system.
Send your application detailsFAQ
Frequently asked questions about 7866+7872D H2 Purity Analyzer selection and applications
Find guidance on 7866+7872D H2 Purity Analyzer measuring range, installation, operating conditions, and integration with hydrogen monitoring systems.
What gas mixtures can the 7866+7872D analyze?
The listed ranges are CO₂ in air from 0–100% Vol, H₂ in CO₂ from 0–100% Vol, and H₂ in air from 75–100% Vol.
What accuracy is specified?
The product reference lists ±2% F.S. for standard binary gas mixtures. Confirm suitability against the actual gas composition and project conditions.
What does the 4–20 mA output represent?
The factory setting maps 4–20 mA to 75–100% H₂ in air, with a maximum load of 800 Ω. Other gas-mixture ranges should be reviewed with the supplier.
What are the response times?
For hydrogen the listed response is T63: 13 seconds and T90: 23 seconds. For CO₂ it is T63: 24 seconds and T90: 45 seconds.
What should I include in a quotation request?
Share the generator type, gas mixture, monitoring objective, required range, sample flow, output mapping, installation space and site classification.
How large is the analyzer system?
The listed dimensions are 800 × 400 × 1660 mm and weight is 131 kg. Confirm the installation footprint and service access before ordering.
Discuss 7866+7872D H2 Purity Analyzer for your application
Send your operating conditions and project requirements for a technical review and quotation.
Contact the Sales Team