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Beijing Lijia United Technology Co., Ltd.

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BrandNikira
OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
ModelOEA-532
Instrument TypeAerosol Detector
Wavelength532 nm
Dynamic Range0 to >3000 Mm⁻¹
Accuracy±1 Mm⁻¹ (nominal)
Data Rate1 s
Measurement PrincipleOpen-Path Cavity Ring-Down Spectroscopy (CRDS)
CalibrationAutonomous in-situ self-calibration
ConsumablesNone
Operating Temperature−5 to +50 °C
Relative Humidity0–99 % RH (non-condensing)
Dimensions49 cm × 33 cm × 18 cm
Weight7.7 kg
Power Consumption35 W
Onboard Memory>1 million readings (≥2 years continuous at 1 Hz)
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BrandPicarro
OriginUSA
ModelG2401-m
Instrument TypePortable
Detection TargetsCO, CO₂, CH₄, H₂O
Response Time≤ 3.5 s
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Operating Temperature Range10–35 °C
Sample Pressure Range250–1000 Torr (40–133 kPa)
Sample Flow Rate< 0.6 slm at >250–1000 Torr
Weight31.75 kg (incl. external pump)
Dimensions (Analyzer)44.6 × 17.8 × 43.2 cm
Power Requirement100–240 VAC, 47–63 Hz
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BrandPicarro
OriginUSA
ModelG2307
PortabilityPortable
Response Time< 5 s
RepeatabilityH₂CO, CH₄, and H₂O
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Detection Limits (3σ, 300 s)0.18 ppb (H₂CO), 0.3 ppb (CH₄)
Long-Term Drift (24 h, STP)1.5 ppb (H₂CO)
Temperature Control Stability±0.005 °C
Pressure Control Stability±0.0002 atm
Sample Flow Rate~400 sccm at 760 Torr
Operating Temperature Range10–35 °C
Dimensions (Analyzer)43.2 × 17.9 × 44.6 cm
Weight (Analyzer)21.3 kg
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BrandPicarro
OriginUSA
ModelG4301
PortabilityPortable
Response Time5 s
RepeatabilityCO₂, CH₄, H₂O
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Power Consumption25 W
Battery LifeUp to 8 h
Dimensions35.6 × 17.7 × 46.4 cm
Weight10.4 kg
Operating Temperature10–45 °C
Relative Humidity<85% non-condensing
Sample Flow Rate~1 SLPM
Detection Limits (3σ, 300 s)CO₂: 0.12 ppm, CH₄: 0.9 ppb, H₂O: N/A
Accuracy (5 s)CO₂: 0.4 ppm + 0.1% of reading, CH₄: 3 ppb + 0.1% of reading, H₂O: 100 ppm + 5% of reading
Drift (24 h)CO₂: 0.5 ppm (typ. 0.18 ppm), CH₄: 1 ppb (typ. 0.56 ppb)
Measurement RangeCO₂: 0–3%, CH₄: 0–800 ppm, H₂O: 0–3% (non-condensing)
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BrandIris
OriginBeijing, China
ModelIRIS Airborne Integrated LiDAR-Hyperspectral Imaging System
Spectral Range400–1000 nm
Spectral Resolution2.7 nm
Sampling Interval2.1 nm
Spectral Bands561 (binned: 281)
Spatial Pixels per Line1364
Max Frame Rate249 fps
LiDAR Scan Rate320,000 pts/sec
Max Range150 m
Horizontal Accuracy±2 cm (1σ)
Vertical Accuracy±1 cm (1σ)
IMU Attitude RMS (Pitch/Roll)0.04° (PPK-enabled)
GNSS CompatibilityBeiDou, GPS, GLONASS + RTK
System Weight2.4 kg
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BrandLGR
OriginUSA
ModelDLT-100 (Benchtop), RMT-200 (Portable)
Detection PrincipleOff-Axis Integrated Cavity Output Spectroscopy (Off-Axis ICOS)
Measurement Range0.3–25 ppm CH₄
Precision1 ppb @ 1 Hz (ambient conditions)
Response Time<0.05 s (with external pump), 25 s (internal pump)
AccuracyBetter than ±1% of reading
Operating Temperature0–50 °C
Relative Humidity<98% RH, non-condensing
Data OutputRS-232, Analog (0–10 V / 4–20 mA), Ethernet
Data StorageInternal 20 GB HDD + 12.1" color TFT display
Power115/230 V AC, 50/60 Hz, 80 W (excl. optional external pump)
Dimensions (Benchtop)25.4 × 96.5 × 35.56 cm
Dimensions (Portable)22.2 × 48.26 × 60.9 cm
Weight27 kg
ComplianceDesigned for field-deployable, unattended operation
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
ModelAPOGEE
PriceUpon Request
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BrandPicarro
OriginUSA
ModelG2311-f
Instrument TypePortable
Detection TargetsMulti-component (CO₂, CH₄, H₂O)
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Sampling ModeSimultaneous 10 Hz continuous measurement
CalibrationBuilt-in water vapor correction for dry-mole-fraction reporting
ComplianceDesigned for eddy covariance, gradient, and chamber-based flux quantification per USDA ARS, FLUXNET, and ICOS protocols
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
Model Numbers907-0038 (Standard Rackmount), 911-0038 (Enhanced Precision EP), 915-0038 (Ultra-Portable)
Measurement PrincipleOff-Axis Integrated Cavity Output Spectroscopy (OA-ICOS)
Detection Limits0.2 ppb (HCl & HF, 1σ, 100 s)
Precision (1σ)2 ppb (5 s), 0.2 ppb (100 s)
Drift (24 h, STP, EP model)≤1 ppb
Measurement Range (full-spec)0.2–2000 ppb
Optional Extended Range0–10 ppm
Response Time (flow-limited)<6 s
Data OutputRS-232, Analog, Ethernet, USB
Power115/230 VAC, 50/60 Hz or 12 VDC
Power Consumption100 W (Standard), 150 W (EP)
Operating Temperature0–45 °C
Sample Temperature Range–10 to +80 °C
Relative Humidity0–100 % RH (non-condensing)
Dimensions & WeightStandard: 22.2 × 48.3 × 61 cm, 29.5 kg
EP35.6 × 48.3 × 61 cm, 40.8 kg
Ultra-Portable17.8 × 47 × 35.6 cm, 19 kg
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BrandNikira
OriginUSA
Manufacturer TypeAuthorized Distributor
Import StatusImported
ModelLI-G3004 Portable Methane and Ethane Analyzer (MEPA)
PricingUpon Request
Measurement PrincipleCavity-Enhanced Absorption Spectroscopy (CEAS) in Mid-Infrared
CH₄ Precision< 2 ppb/s
C₂H₆ Precision< 500 ppt/s
CH₄ Sensitivity< 6 ppb/s
C₂H₆ Sensitivity< 1.5 ppb/s
CH₄ Range1–100 ppm (highly linear)
C₂H₆ Range0.001–3 ppm (highly linear)
extended modeCH₄ 1 ppm–1%, C₂H₆ 500 ppt–500 ppm (nonlinear correction applied)
Data Output Rate2 Hz
Response Time1 Hz (1/e)
Sample Flow RateNot specified
Operating Temperature0–45 °C
Operating Humidity0–98 % RH (non-condensing)
Inlet Fitting¼" Swagelok
Data InterfacesRS-232 serial, built-in Wi-Fi, Ethernet (RJ-45), USB-A, HDMI
Dimensions22" × 9" × 5.5" (56 cm × 23 cm × 14 cm)
Weight4 kg
Power Consumption< 30 W
Input Power14–36 VDC, 2.5 A
Internal Storage30 GB
Calibration IntervalAnnual
MaintenanceLow-frequency filter replacement only
WarrantyStandard manufacturer warranty
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BrandPicarro
OriginUSA
ModelPI2114
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Detection Limit<3 ppb (3σ, 300 s)
Accuracy<1 ppb + 0.1% of reading (1σ, 300 s)
Precision (5-min)<0.5 ppb (1σ)
Response Time (10–90% / 90–10%)<60 s
Measurement Range0–100 ppm
Sample Flow Rate<1 slm at 760 Torr
Operating Temperature–10 to 45 °C
Sample Pressure300–1000 Torr (40–133 kPa)
Relative Humidity<99% RH, non-condensing at 40 °C
CertifiedCE Mark, CDRH
ComplianceFDA 21 CFR Part 11, GMP-ready
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BrandPicarro
OriginUSA
ModelG2508
Instrument PrincipleCavity Ring-Down Spectroscopy (CRDS)
TypeBenchtop / Portable Configurable System
Response Time< 8 s (10–90% rise/fall)
RepeatabilityN2O/CH4/CO2/NH3/H2O
Measurement SensitivitySub-ppb for N2O, CH4, CO2, NH3
Operating Environment10–35 °C, <85% RH (non-condensing)
Sample Pressure300–1000 Torr (40–133 kPa)
Sample Flow Rate~230 sccm
Cavity Temperature Stability±0.005 °C
Cavity Pressure Stability±0.0002 atm
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BrandLGR
OriginUSA
ModelFGGA
TypeOff-Axis Integrated Cavity Output Spectroscopy (Off-Axis ICOS) Analyzer
Detection TargetsCH₄, CO₂, H₂O
RepeatabilityCH₄ ≤ 1 ppbv, CO₂ ≤ 0.2 ppmv, H₂O ≤ 100 ppmv
Response Time0.1 s (with external DSVP pump), 25 s (with internal pump)
Mirror Reflectivity>99.999%
Accuracy<1% of reading
Measurement RangesCH₄: 0.1–10,000 ppmv (standard), down to 0.005 ppmv (optional)
CO₂200–20,000 ppmv (standard), up to 20,000 ppmv (optional)
H₂O7,000–80,000 ppmv (standard), 1,500–80,000 ppmv (optional)
Effective Optical Path Length~2.5 km (typical, based on 25 cm cavity with 99.999% mirrors)
Data Storage40 GB internal SSD
Display12.1" color TFT (desktop only)
Sample Temperature Range0 °C
Operating Temperature5–40 °C
Operating Humidity0–98% RH (non-condensing)
Gas Inlet Fittings1/4", 3/8", or 1/2" Swagelok®
Power115/230 VAC, 50/60 Hz, 90 W (DC conversion supported)
Dimensions (Desktop)25 × 96 × 35 cm
Dimensions (Portable)22 × 48 × 61 cm
Weight30 kg (desktop), ~18 kg (portable)
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KeyBrand: Picarro
OriginUSA
ModelG2308
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Target GasesNitrous Oxide (N₂O), Methane (CH₄), Water Vapor (H₂O)
N₂O Precision (1σ, 5 min)<3.5 ppb + 0.008% of reading
CH₄ Precision (1σ, 5 min)<3 ppb + 0.02% of reading
H₂O Precision (1σ, 5 min)<100 ppm
Detection LimitsN₂O ≤10 ppb (1-min), CH₄ ≤7 ppb (1-min), H₂O ≤250 ppm (1-min)
Sample Flow Rate~230 sccm
Operating Pressure Range300–1000 Torr (40–133 kPa)
Temperature Control Stability±0.005 °C (cavity)
Pressure Control Stability±0.0002 atm (cavity)
Dimensions (W×H×D)43.2 × 17.8 × 44.6 cm
Weight22.6 kg
Power100–240 VAC, 47–63 Hz, 110 W (steady-state)
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OriginUSA
ManufacturerLos Gatos Research
TypeOA-ICOS-based Ambient NO₂ Monitor
Models907-0009 (Rack-Mount Standard), 908-0009 (Benchtop Standard), 911-0009 (Enhanced Performance Rack-Mount)
Detection Limit0.05 ppb (1σ, 60 s)
Precision50 ppt (1σ, 1 s)
Response Time (Cavity Flush)10 s (Internal Pump) / 1 s (Optional External Vacuum Pump)
Drift≤50 ppt (24 h, EP model, STP, 15-min avg)
Measurement Range0.01–1000 ppb (full-spec)
Optional Extended Range0–3000 ppb
LinearityFull-scale linear
Zero CalibrationAuto-zero via metal oxide scrubber (no zero gas required)
Sample Temp.0–50 °C
Operating Temp.5–45 °C
Humidity0–100% RH (non-condensing)
Power115/230 VAC, 50/60 Hz, 100 W (Std) / 150 W (EP)
Dimensions & WeightBenchtop Std: 25.4 × 96.5 × 35.6 cm, 27 kg
Rack Std22.2 × 48.3 × 61 cm, 27 kg
Rack EP35.6 × 48.3 × 61 cm, 40 kg
OutputsRS-232, Analog (0–10 V / 4–20 mA), Ethernet, USB
Internal Data StorageLinux-based embedded computer with HDD logging
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
Model915-0011
Response Time1 s
RepeatabilityCH₄ < 0.25 ppb (100 s), CO₂ < 40 ppb (100 s), H₂O < 15 ppm (100 s)
Measurement PrincipleCavity Ring-Down Spectroscopy (CRDS)
Form FactorPortable
Power Consumption60 W (DC), 66 W (AC)
Dimensions17.8 cm H × 47 cm W × 35.6 cm D
Weight15 kg
Operating Temperature5–45 °C
Sample Temperature Range−10–50 °C
Relative Humidity0–100% RH (non-condensing)
Detection Limits (1σ, 100 s)CH₄: 0.25 ppb, CO₂: 40 ppb, H₂O: 15 ppm
Full-Scale Linear RangeCH₄: 0.01–100 ppm (extendable to 10% vol), CO₂: 1–20,000 ppm, H₂O: 500–70,000 ppm (0–100% RH)
Data OutputRS-232, Analog, Ethernet, USB
Accuracy<1% uncertainty (uncalibrated, 10–35 °C)
Sampling Rate0.01–1 Hz
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
Model911-0035
PricingAvailable Upon Request
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
Model Numbers907-0017 (Standard Rackmount), 911-0017 (Enhanced Precision), 915-0017 (Ultra-Portable)
Detection PrincipleOff-Axis Integrated Cavity Output Spectroscopy (OA-ICOS)
Measurement TargetHydrogen Fluoride (HF) and Water Vapor (H₂O)
Detection Limit0.1 ppb (1σ, 100 s)
Precision1 ppb (1σ, 1 s) / 0.1 ppb (1σ, 100 s)
Drift≤0.1 ppb (24 h, EP model, STP, 15-min avg)
Measurement Range0.1–2000 ppb (standard)
Response Time<10 s (with optional external pump)
Data OutputRS-232, Analog, Ethernet, USB
Power115/230 VAC, 50/60 Hz or 12 VDC
Power Consumption100 W (Standard), 150 W (EP), 70 W (Ultra-Portable)
Operating Temperature0–45 °C
Sample Temperature0–50 °C
Relative Humidity0–100% RH (non-condensing)
Dimensions & WeightStandard: 22.2 × 48.3 × 61 cm, 29 kg
EP35.6 × 48.3 × 61 cm, 40 kg
Ultra-Portable17.8 × 47 × 35.6 cm, 19 kg
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BrandLI-COR
OriginUSA
Manufacturer TypeAuthorized Distributor
Country of OriginImported
ModelLI-G2003 Portable CH₄/H₂O Analyzer (PMA)
PriceAvailable Upon Request
Detection PrincipleCavity-Enhanced Absorption Spectroscopy (CEAS)
CH₄ Sensitivity< 10 ppb (1σ, 1 s)
CH₄ Measurement Range0–1 % (10,000 ppm)
H₂O Measurement CapabilityYes
Form FactorHandheld / Vehicle-Mountable / UAV-Compatible
Weight2.3 kg (5.0 lbs)
Power SupplyInternal Rechargeable Battery
ConnectivityIntegrated GPS + Wi-Fi
SoftwareOpen-Source, Customizable Firmware & Data Acquisition Suite
Calibration StabilityExtended Drift-Free Operation Without Frequent Recalibration
ComplianceDesigned for Field Deployment in EPA Method 21–adjacent surveys, ASTM D6522-compliant ambient air monitoring, and GHG inventory verification per IPCC Tier 2/3 protocols
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BrandPalas
OriginGermany
ModelAQ Guard Smart 1000
Certification BasisEN 16450 & MCERTS (TÜV-verified, certificate pending)
Measured ParametersPM₁, PM₂.₅, PM₄, PM₁₀, Total Particle Number Concentration (Cₙ)
Time Resolution≤1 min
CommunicationGPRS/3G/4G/Ethernet/Wi-Fi (LoRaWAN optional)
Cloud PlatformMyAtmosphere™
Environmental RatingIP65
Operating Temperature−20 °C to +50 °C
Integrated SensorsTemperature, Relative Humidity, Barometric Pressure
Expandable WithExternal Weather Station, LoRa-enabled peripherals, Solar-shield enclosure
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
Models907-0037 (Standard Rackmount), 911-0037 (Enhanced Precision), 915-0037 (Ultra-Portable)
Repeatability (1σ)2 ppb (1 s), 0.2 ppb (100 s)
Max Drift (EP, 15-min avg, STP, 24 h)1 ppb
Measurement Range (full spec compliance)0.2–2000 ppb
Optional Range0–30 ppm
Measurement Rate0.01–1 Hz (flow response <10 s requires optional external pump)
Sample Temp0–50 °C
Operating Temp0–45 °C
Humidity0–100% RH (non-condensing)
OutputsRS-232, Analog, Ethernet, USB
Power115/230 VAC, 50/60 Hz or 12 VDC
Power Consumption100 W (Standard), 150 W (EP), 70 W (Ultra-Portable)
Dimensions & WeightStandard: 22.2 × 48.3 × 61 cm, 29 kg
EP35.6 × 48.3 × 61 cm, 40 kg
Ultra-Portable17.8 × 47 × 35.6 cm, 19 kg
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BrandPicarro
OriginUSA
ModelG2920
Instrument TypePortable
Detection TargetsC₂H₄O, CO₂, CH₄, H₂O
Detection PrincipleCavity Ring-Down Spectroscopy (CRDS)
Detection Limit (3σ, 300 s)100 ppt for C₂H₄O
Measurement Interval< 2 s
Response Time (10–90%)< 10 s
Operating Temperature Range−10 °C to 80 °C (sample), 10 °C to 35 °C (ambient)
Pressure Control Accuracy±0.0002 atm
Temperature Control Accuracy±0.005 °C
Sample Flow Rate~250 sccm at 760 Torr
Humidity ToleranceRH < 99% (non-condensing at 40 °C)
Dimensions (Analyzer)43.2 × 17.9 × 44.6 cm
Weight (Analyzer)21.3 kg
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BrandPalas
OriginGermany
ModelAQ Guard
Instrument TypePortable
Measurement PrincipleSingle-Particle Optical Light Scattering with Advanced Mass Conversion Algorithm
Particle Size Range175 nm – 20 µm
Certified Technology BaseEN 16450-compliant Fidas®200 platform
CO₂ & TVOC DetectionIntegrated electrochemical and PID sensors
Environmental RatingAmbient (AQ Guard “Ambient” variant features heated aerosol inlet for reference-grade accuracy)
Compliance ContextDesigned to support ISO 16000-8, ISO 29463, and EU Directive 2008/50/EC monitoring requirements
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BrandNikira
OriginUSA
ModelLI-G2002 Optical Ammonia Analyzer (OAA)
Measurement PrincipleICOS/CEAS (Integrated Cavity Output Spectroscopy / Cavity-Enhanced Absorption Spectroscopy)
NH₃ Accuracy±1 ppb (1 s, 1σ)
NH₃ Range1 ppb – 10 ppm
Data Output Rate1 Hz
Response Time< 2 s
Sample Flow Rate2 SLPM
Operating Temperature5–45 °C
Operating Humidity0–95 % RH (non-condensing)
Communication InterfacesRS-232 serial, built-in Wi-Fi, UART, USB 3.0, HDMI
Dimensions22" × 14" × 7.5" (55.9 × 35.6 × 19.1 cm)
Weight8 kg
Power Supply14–28 VDC, 2.5 A
Power Consumption35 W
Onboard Storage32 GB SD card (supports >1 million data points, ~2 years of continuous 1-Hz logging)
CalibrationZero-air and span-gas optional
FilterReplaceable inlet particulate filter
Warranty1 year
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