WN900 Landfill Gas Detector

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WN900 Landfill Gas Detector

Product ID：HQZXkqi009

Price: Please inquire PDF Format

Supply Ability:50SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberWN900

Brand NameCZYITONG

Payment TermsTT，PAYPAL，Alibaba.com Pay

WN900 Landfill Gas Detector

Product Introduction
The WN900 Landfill Gas Detector is an intelligent, pump-operated multi-gas analyzer designed for landfill gas monitoring, industrial hygiene, and other gas detection applications. Its flexible sensor configuration supports up to four gas sensors, including an optional nondispersive infrared (NDIR) sensor for carbon dioxide detection.
Depending on the selected configuration, the WN900 can monitor gases such as methane (CH₄), oxygen (O₂), carbon dioxide (CO₂), hydrogen sulfide (H₂S), combustible gases, and other toxic gases. It also measures ambient temperature and humidity.
Equipped with a built-in sampling pump, a large color touchscreen, audible and visual alarms, and internal data storage for up to 256 records, the WN900 supports field inspections and routine gas safety monitoring.

Performance Features
• Flexible multi-gas configuration: Supports up to four gas sensors, including CO₂, depending on the selected configuration.
• NDIR carbon dioxide detection: Uses infrared sensing technology for CO₂ measurement.
• Built-in sampling pump: Draws gas samples from remote locations through a sampling line.
• Temperature and humidity monitoring: Measures environmental temperature and relative humidity alongside gas concentrations.
• Color touchscreen: Provides a clear display and convenient operation.
• Audible and visual alarms: Alerts users when configured alarm conditions are triggered.
• Internal data storage: Stores up to 256 records.
• USB data transfer: Connects to a computer for data access.
• Automatic unit conversion: Displays gas concentration in ppm and mg/m³, with automatic conversion where supported.
• Self-check function: Checks the display, battery, sensors, and audible and visual alarm functions at startup or when required.
• Long operating time: Approximately 200 hours of continuous operation under the stated conditions.

Working Principle
The WN900 draws gas from the sampling point into the instrument using its built-in pump. The installed sensors measure the concentrations of the selected gases.
The NDIR sensor measures carbon dioxide by detecting infrared absorption associated with CO₂. Other gases are measured using their corresponding configured sensors. Environmental temperature and humidity are also monitored.
The instrument displays the measurement results on its color touchscreen and can trigger audible and visual alarms according to the configured alarm thresholds. Measurement records can be stored internally and transferred to a computer through the USB interface.

Technical Specifications

Parameter	Specification
Model	WN900
Instrument type	Pump-operated multi-gas detector
Maximum sensor configuration	Up to 4 gas sensors
Methane (CH₄), LEL	0–100% LEL
Methane resolution	1% LEL
Oxygen (O₂) range	0–30%
Oxygen resolution	0.1%
Carbon dioxide (CO₂) range	0–20,000 ppm
Carbon dioxide resolution	10 ppm
Hydrogen sulfide (H₂S) range	0–500 ppm
Hydrogen sulfide resolution	1 ppm
CO₂ sensing technology	NDIR
CO₂ sensor service life	Approximately 7 years
Other sensor service life	Approximately 30 months
Sampling method	Built-in pump
Display	Large color LCD touchscreen
Alarm	Audible and visual
Data storage	Up to 256 records
Data interface	USB
Display units	ppm and mg/m³, with automatic conversion
Temperature monitoring	Supported
Humidity monitoring	Supported
Continuous battery operating time	Approximately 200 hours
Charging accessory	Charger included
Operating temperature	−10 to 45°C
Operating humidity	5–90% RH

Note: The stated gas ranges and resolutions apply to the listed sensors. Confirm the actual sensor combination, methane measurement basis, alarm settings, and sampling-line configuration when ordering.

Application Scenarios
• Landfill gas monitoring: Measuring methane, carbon dioxide, oxygen, and hydrogen sulfide in landfill environments.
• Waste management facilities: Supporting gas inspections around waste treatment and disposal operations.
• Industrial hygiene: Checking selected toxic, combustible, and oxygen-related gas hazards in workplaces.
• Environmental monitoring: Assessing gas concentrations at selected environmental sampling points.
• Confined-space preparation: Supporting preliminary atmospheric assessment when used within an appropriate confined-space safety procedure.
• Routine safety inspections: Recording gas measurements and transferring data for reporting and review.

WN900 vs. Conventional Single-Gas Detectors

Comparison Item	WN900 Multi-Gas Detector	Conventional Single-Gas Detector
Gas monitoring	Configurable for up to four gas sensors	Usually designed for one target gas
CO₂ measurement	NDIR sensor option	Depends on the detector type
Sampling	Built-in pump	May use diffusion or pumped sampling
Environmental measurements	Temperature and humidity	Depends on the model
Display	Color touchscreen	Varies by instrument
Alarms	Audible and visual	Depends on the model
Data storage	Up to 256 records	Depends on the model
Data transfer	USB interface	Depends on the model
Best suited for	Multi-gas field inspection and landfill monitoring	Monitoring a specific gas

Frequently Asked Questions
Q1: What gases can the WN900 detect?
Depending on sensor configuration, it can detect methane, oxygen, carbon dioxide, hydrogen sulfide, combustible gases, and other toxic gases. The instrument supports up to four gas sensors.
Q2: How does the WN900 measure carbon dioxide?
It uses a nondispersive infrared (NDIR) sensor to measure CO₂ concentrations from 0 to 20,000 ppm, with a stated resolution of 10 ppm.
Q3: Does the detector have a built-in sampling pump?
Yes. The pump draws gas through a sampling line, allowing sampling from locations away from the instrument. The achievable sampling distance depends on the tubing, flow rate, and system configuration.
Q4: Can the WN900 measure temperature and humidity?
Yes. In addition to gas detection, it monitors environmental temperature and relative humidity.
Q5: How many records can the instrument store?
The WN900 can store up to 256 records internally and supports USB data transfer to a computer.
Q6: What is the battery operating time?
The stated continuous operating time is approximately 200 hours. Actual runtime may vary with sensor configuration, pump operation, alarm activity, and battery condition.
Q7: How long do the sensors last?
The specified service life is approximately seven years for the CO₂ sensor and 30 months for other sensors. Actual service life depends on operating conditions, calibration, maintenance, and exposure to contaminants.
Q8: Does the WN900 measure methane in percent or ppm?
The supplied specification lists methane as 0–100% LEL with a resolution of 1% LEL. This is a measurement relative to the lower explosive limit, not a direct methane volume percentage. Confirm the display format and calibration gas for the selected configuration.
Q9: Is the WN900 suitable for confined-space entry?
It can support atmospheric assessment when configured for the relevant hazards, but it should not be treated as sufficient for entry approval on its own. Verify sensor suitability, calibration, alarm settings, sampling procedures, and applicable safety requirements before use.

Frequently Asked Questions
Q1: What gases can the WN900 detect?
Depending on sensor configuration, it can detect methane, oxygen, carbon dioxide, hydrogen sulfide, combustible gases, and other toxic gases. The instrument supports up to four gas sensors.
Q2: How does the WN900 measure carbon dioxide?
It uses a nondispersive infrared (NDIR) sensor to measure CO₂ concentrations from 0 to 20,000 ppm, with a stated resolution of 10 ppm.
Q3: Does the detector have a built-in sampling pump?
Yes. The pump draws gas through a sampling line, allowing sampling from locations away from the instrument. The achievable sampling distance depends on the tubing, flow rate, and system configuration.
Q4: Can the WN900 measure temperature and humidity?
Yes. In addition to gas detection, it monitors environmental temperature and relative humidity.
Q5: How many records can the instrument store?
The WN900 can store up to 256 records internally and supports USB data transfer to a computer.
Q6: What is the battery operating time?
The stated continuous operating time is approximately 200 hours. Actual runtime may vary with sensor configuration, pump operation, alarm activity, and battery condition.
Q7: How long do the sensors last?
The specified service life is approximately seven years for the CO₂ sensor and 30 months for other sensors. Actual service life depends on operating conditions, calibration, maintenance, and exposure to contaminants.
Q8: Does the WN900 measure methane in percent or ppm?
The supplied specification lists methane as 0–100% LEL with a resolution of 1% LEL. This is a measurement relative to the lower explosive limit, not a direct methane volume percentage. Confirm the display format and calibration gas for the selected configuration.
Q9: Is the WN900 suitable for confined-space entry?
It can support atmospheric assessment when configured for the relevant hazards, but it should not be treated as sufficient for entry approval on its own. Verify sensor suitability, calibration, alarm settings, sampling procedures, and applicable safety requirements before use.