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Beijing Ligtai Technology Co., Ltd.

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BrandLI-COR
OriginUSA
ModelLI-190R
Measurement Range0 to >10,000 μmol·m⁻²·s⁻¹
Spectral Range400–700 nm
Calibration Uncertainty±5%
Sensitivity5–10 μA per 1000 μmol·m⁻²·s⁻¹
Linearity Error≤1% up to 10,000 μmol·m⁻²·s⁻¹
Response Time<1 μs
Temperature Dependence<0.15%/°C
Cosine Response Error<±1% at 82° zenith angle
Operating Environment−40 to +65°C, 0–100% RH (non-condensing)
DetectorBlue-enhanced silicon photovoltaic cell
HousingAnodized aluminum with acrylic diffuser and stainless-steel mounting hardware
Dimensions2.36 cm Ø × 3.63 cm H
WeightSensor head: 24 g
2 m cable with base60 g
Cable Options2 m, 5 m, 15 m, 50 m
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BrandVELP
OriginItaly
ModelUDK 159
Instrument TypeKjeldahl Nitrogen Determinator
Nitrogen Detection Range≥ 0.1 mg N
Distillation Time0–99 min
Repeatability≤ 1 %
Sample Weight Capacity10 g
Nitrogen Recovery Rate≥ 99.5 %
Power Consumption2200 W
Dimensions (L×W×H)416 mm × 385 mm × 780 mm
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BrandVELP
OriginItaly
ModelUDK 129
Instrument TypeKjeldahl Nitrogen Determinator
Nitrogen Determination Range0.1–200 mg
Distillation Time3–5 min per sample
Repeatability±0.5%
Sample Weight Capacity≤5 g
Nitrogen Recovery Rate≥99.5%
Power Consumption2100 W
Dimensions (W×D×H)385×416×780 mm
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BrandLI-COR
OriginUSA
ModelLI-191R
Measurement Range0–5000 μmol·s⁻¹·m⁻² (PPFD)
Spectral Range400–700 nm
Calibration Uncertainty±10% (NIST-traceable)
Sensitivity7 μA per 1000 μmol·s⁻¹·m⁻² (typ.)
Linearity Error≤1% up to 10,000 μmol·s⁻¹·m⁻²
Response Time10 μs
Temperature Dependence≤±0.15%/°C
Cosine CorrectionAcrylic diffuser
Azimuthal Error<±2% at 45° elevation over 360°
Spatial Uniformity±7% across 1 m length (tested under 2.54 cm incandescent source)
Active Area1 m × 12.7 mm
Operating Environment−40 to +65 °C, 0–95% RH (non-condensing)
DetectorBlue-enhanced silicon photovoltaic cell
HousingAnodized aluminum with acrylic diffuser and stainless steel fasteners
Dimensions121.3 × 2.54 × 2.54 cm (L×W×D)
Weight1.4 kg
Cable LengthStandard 2 m (5 m optional)
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BrandMETER
OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
ModelSKS20 Pore Water Sampler System
Vacuum ControllersVS-Pro, VacuPorter, VPS-2
Sampling PrincipleSuction-based ceramic cup extraction under controlled negative pressure
Ceramic Cup MaterialSintered aluminum oxide
Cup DimensionsØ2 cm × 6 cm
Dead VolumeMinimal
pH Range4–9
Bubble Point–100 kPa
Sampling Rate (Free Water, –50 kPa)~5 mL / 10 min
Sampling Rate (Sandy Loam, –50 kPa)~5 mL / h
Vacuum Range (VS-Pro)0 to –85 kPa
Vacuum Accuracy (VS-Pro)±0.05 kPa
Power Supply (VS-Pro)10.5–15 VDC
Current Draw (VS-Pro, Operating)~15–16 mA
Memory Capacity (VS-Pro)5,000 readings
Enclosure Rating (VS-Pro)IP66
Operating Temperature (VS-Pro)–10 °C to 45 °C
VacuPorter Max Vacuum–85 kPa @ 1 bar
VacuPorter Flow Rate10 L/min
VacuPorter Battery Life7 h
VPS-2 Max Vacuum–85 kPa @ 1 bar
VPS-2 Displacement0.41 L/stroke
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BrandVELP
OriginItaly
ModelEMA 502 CHNS-O
Measurement PrincipleHigh-Temperature Combustion (CHNS) and Pyrolysis (O) with Gas Chromatography–Thermal Conductivity Detection (GC-TCD)
Sample ThroughputUp to 117 samples per run
Analysis Time≥12 min (CHNS), ≥6 min (O)
Detection MethodTCD (no reference gas required)
Sample FormSolid, semi-solid, liquid
Max Sample Mass100 mg (C-dependent)
Calibration Range (He carrier)C 0.001–20 mg, H 0.001–5 mg, N 0.001–20 mg, S 0.01–6 mg, O 0.005–6 mg
Precision (RSD)≤0.2% (sulfanilic acid)
Operating Temperatures1030 °C (CHNS combustion), 1060 °C (O pyrolysis)
Carrier GasesHelium or Argon (Ar for CHN only)
ComplianceAOAC, AACC, ASBC, ISO, DIN, IFFO, OIV, ASTM, EPA, FDA 21 CFR Part 11 (optional)
SoftwareEMASoft™ with LIMS export, Ermes Cloud integration
ConnectivityUSB, RS232, Wi-Fi/LAN
Power570 W
Dimensions (W×H×D)500 × 510 × 410 mm (680 mm H with autosampler)
Weight45 kg
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BrandLI-COR
OriginUSA
ModelLI-210R
Spectral Range450–650 nm
Output Unitlux / klux
Calibration Uncertainty±5% (absolute)
Sensitivity30 µA per 100 klux (typical)
Linearity≤1% (up to 100 klux)
Response Time<1 µs
Temperature Dependence±0.15%/°C
Cosine Correction Accuracy±1% up to 82° incidence angle
Azimuthal Error<±1% over 360° at 45° elevation
Tilt IndependenceNo orientation-dependent bias
Operating Environment−40 to +65°C, 0–100% RH (non-condensing)
DetectorBlue-enhanced silicon photovoltaic cell
HousingAnodized aluminum with acrylic diffuser and stainless steel mounting hardware
Dimensions2.36 cm Ø × 3.63 cm H
Head Mass24 g
Cable Options2 m, 5 m, 15 m, or 50 m
Compatible LoggersLI-1500, LI-250A, 2420 Amplifier, mV Adapter 2003S, Leveling Base 2001S/2003S, Protective Hood
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BrandLI-COR
OriginUSA
ModelLI-7825
Instrument TypeStable Gas Isotope Ratio Analyzer
CO₂ Measurement Range50–2000 ppm
CO₂ δ¹³C Precision<0.5 ‰ (1-s avg), <0.04 ‰ (5-min avg) @ 400 ppm
CO₂ δ¹⁸O Precision<0.1 ‰ (5-min avg) @ 400 ppm
CO₂ δ¹⁷O Precision<0.4 ‰ (5-min avg) @ 400 ppm
NH₃ Measurement Range0–30,000 ppm
NH₃ Precision2 ppb (1-s avg) @ 300 ppb
H₂O Range0–60,000 ppm
Measurement TechniqueOptical Feedback–Cavity Enhanced Absorption Spectroscopy (OF-CEAS)
Measurement Frequency1 Hz
Cavity Volume6.41 cm³
Sample Flow Rate250 sccm (70 sccm with low-flow accessory)
Operating Temperature−25 °C to +45 °C
Operating Humidity0–85 % RH (non-condensing, no direct sunlight)
Power Consumption22 W @ 25 °C
Weight10.5 kg (with battery)
Dimensions (L×H×W)51 × 33 × 18 cm
ConnectivityEthernet & Wi-Fi (2.4 GHz, 802.11 a/b/g/n/ac)
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BrandVELP
OriginItaly
ModelUDK 169 & AutoKJEL
Instrument TypeKjeldahl Nitrogen Determinator
Nitrogen Detection Range≥0.1 mg N
Distillation Time1–99 min
Repeatability≤1%
Sample Weight Capacity10 g
Nitrogen Recovery Rate>99.5%
Power Consumption2200 W
Dimensions (W×D×H)385 mm × 416 mm × 780 mm
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BrandVELP
OriginItaly
ModelNDA 701/702
PrincipleDumas Combustion Method
Detection LimitNDA 701: 0.003 mg N (He)
NDA 7020.001 mg N (He) or 0.01 mg N (Ar)
Analysis Time3–4 min per sample
Repeatability (RSD)<0.5% using EDTA standard (9.57% N)
Sample Weight1 g
Recovery Rate>99.5%
Power Consumption1400 W
Dimensions (W×D×H)655 × 510 × 410 mm
Weight54 kg
Carrier GasHe (≥99.999%) or Ar (≥99.999%)
Oxygen SupplyO₂ (≥99.999%, 2 bar)
Combustion Temperature1030 °C
DetectorAuto-calibrating Thermal Conductivity Detector (TCD)
ThroughputUp to 117 samples (4 × 30-position auto-samplers)
ComplianceASTM D515, ISO 13878, AOAC 992.15, EN ISO 16634-1/-2, USP <285>, FDA 21 CFR Part 11 ready (with Ermes software license)
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BrandVELP
OriginItaly
ModelUDK 139
Instrument TypeKjeldahl Nitrogen Determinator
Measurement Range0.01–100 mg N
Distillation Time4 min (for 100 mL sample)
Repeatability≤1%
Sample Mass Requirement≥0.1 g N
Recovery Rate≥99.5%
Power Consumption2100 W
Dimensions (W×D×H)385 × 416 × 780 mm
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BrandLI-COR
OriginUSA
ModelLI-192
Measurement Range400–700 nm
Calibration Uncertainty±5% (in air)
Sensitivity~4 µA per 1000 µmol·s⁻¹·m⁻² (underwater)
Linearity Error≤1% up to 10,000 µmol·s⁻¹·m⁻²
Response Time10 µs
Temperature Dependence≤±0.15%/°C
Cosine CorrectionOptimized for both air and underwater use
Azimuthal Error<±1% at 45° elevation over full 360°
Operating Temperature−40 to +65 °C
Pressure Rating5500 kPa (equivalent to 560 m depth)
DetectorBlue-enhanced, high-stability silicon photovoltaic cell
HousingCorrosion-resistant metal, submersible in freshwater and seawater
Dimensions3.18 cm Ø × 4.62 cm H
Weight227 g
Cable OptionsLI-COR 2222UWB underwater cable (3, 10, 30, 50, or 100 m)
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OriginUSA
Manufacturer TypeAuthorized Distributor
Origin CategoryImported
ModelRM.YOUNG 81000RE
PricingAvailable Upon Request
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BrandLI-COR
OriginUSA
ModelLI-180
Spectral Range380–780 nm
Wavelength Resolution1 nm (FWHM ≈ 12 nm)
Measurement ParametersPPFD (1–3,000 µmol·m⁻²·s⁻¹), Irradiance (0.5–1,000 W·m⁻²), Illuminance (70–150,000 lx)
DetectorCMOS linear image sensor with cosine-corrected optical input
Display3.5″ 320×420 touchscreen LCD
Data Storage8 GB SD card (up to 68,000 files)
Battery Life5 h continuous operation (2500 mAh Li-ion)
AccuracyPPFD ±5%, Illuminance ±5%, Chromaticity (x,y) ±0.0025, CCT ±2%, CRI (Ra) ±1.5%
ComplianceJIS C 1609-1:2006 Class AA, DIN 5032-7 Class B
InterfaceMini USB 2.0, Wi-Fi SD card, microSD (up to 32 GB)
Output Formats.txt, .jpg
Operating Temperature0–35 °C
Dimensions200 × 77 × 26 mm
Weight0.28 kg
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BrandVELP
OriginItaly
ModelCN 802
Analysis MethodHigh-Temperature Combustion (1030 °C)
Detection PrincipleTCD for N, NDIR for C
Analysis Time3–4 min per sample
Sample WeightUp to 1 g
Detection Limits0.001 mg N (He), 0.01 mg N (Ar), 0.01 mg C
Repeatability (RSD)≤0.5% (100 mg EDTA standard)
Recovery>99.5%
Carrier GasHelium or Argon (99.999% purity, 2 bar)
Oxygen Purity99.999%, 2 bar
Power1400 W, 230 V / 50–60 Hz
Dimensions (W×H×D)655×510×410 mm (655×690×410 mm with autosampler)
Weight54 kg
ComplianceAOAC, AOCS, AACC, ISO, EN, CEN, EPA, IFFO
ConnectivityUSB, RS232, Wi-Fi/Ethernet to VELP Ermes Cloud Platform
SoftwareCN802 Control & Analysis Suite with GLP-compliant audit trail, real-time graphing, automated C/N ratio calculation, and report generation
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OriginUSA
ManufacturerMETEK GmbH (Germany), Distributed in North America
Instrument TypeImported High-Precision Turbulence-Grade 3D Ultrasonic Anemometer
ModeluSonic-3 Cage MP / uSonic-3 Class A MP
Sampling RateUp to 30 Hz per transducer pair (90 Hz total radial data rate)
Wind Speed Range±40 m/s
Operating Temperature−40 °C to +60 °C
Relative Humidity5–100 % RH
Wind Accuracy±0.5–1 % RMS @ 5 m/s (horizontal, 0°–20° sector)
Vertical Velocity Resolution0.006 m/s
Temperature Resolution0.01 K
Output Data9 radial wind components, 9 sonic temperature values, Cartesian (u, v, w), scalar wind speed & direction, turbulence statistics (with optional module)
CommunicationRS422, RS485 (300–115.2 kbaud), 10/100 Mbit Ethernet (ASCII protocol, NMEA-compliant framing, checksum support)
Power10–36 VDC, 2.5 W (heating optional: 10–24 VDC, ≤100 W)
Mounting OptionsCage-mount (Cage MP) or Class A meteorological mast mount (Class A MP)
ComplianceDesigned for eddy covariance systems compliant with AmeriFlux, ICOS, and FLUXNET protocols
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BrandLI-COR
OriginUSA
ModelLI-193 Spherical Underwater PAR Sensor
Measurement DepthUp to 350 m
Spectral Range400–700 nm
Calibration Uncertainty±5%
Sensitivity7 µA per 1000 µmol·s⁻¹·m⁻² (typ.)
Linearity±1% deviation up to 10,000 µmol·s⁻¹·m⁻²
Long-term Stability<±2% per year
Response Time10 µs
Temperature Dependence≤±0.15%/°C
Angular Response Error<±4% up to ±90° from vertical axis
Azimuthal Uniformity<±3% over full 360° at 90° from vertical
Operating Temperature−40 to +65 °C
Pressure Rating3400 kPa (equivalent to 350 m seawater depth)
Sensor Sphere Diameter6.1 cm
Base Diameter3.18 cm
Total Height10.7 cm
Mass142 g
Cable OptionsStandard 3 m
optional lengths10, 30, 50, or 100 m (LI-2222UWB submersible cable)
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BrandVELP
OriginItaly
ModelSMS
Dimensions300 × 500 × 190 mm
Weight3.5 kg
ConstructionEpoxy-coated stainless steel
Absorption StagesThree-stage (condensation → alkaline neutralization → activated carbon adsorption)
Pump TypeRecirculating water-based absorption pump (JP series)
Vacuum ControlAdjustable
Optional AccessoriesReplacement activated carbon packs (A00001164), activated carbon filter cartridge (A00001165), IQ/OQ validation documentation (A00000252)
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BrandKipp & Zonen
OriginNetherlands
ModelBrewer MkIII
Wavelength Range286.5–363 nm
Spectral Resolution0.6 nm
Wavelength Stability±0.01 nm (over full operating temperature range)
DetectorPhotomultiplier Tube (PMT)
Optical DesignDual Monochromator
Power Supply230 VAC or 115 VAC
Operating Temperature−20 °C to +50 °C (−50 °C to +50 °C with optional cold-weather housing)
Measured ParametersTotal Ozone Column, SO₂ Column, Spectral UV Irradiance (UVA, UVB, UVE), UV Index (UVI)
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BrandMETER
OriginUSA
Manufacturer TypeAuthorized Distributor
Import StatusImported
ModelES-2
Measurement ParameterSingle (Electrical Conductivity)
Form FactorPen-style
Deployment EnvironmentIn-pipe, in-tank, and pore-water applications
EC Range0–120 dS/m
TDS RangeDerived from EC (default 0.5–0.7 conversion factor)
Resistivity Range0.0083–1000 kΩ·cm (calculated inverse)
Salinity Range0–60 ppt (based on PSS-78 standard)
Temperature Range–40 to +60 °C
AccuracyEC: ±0.01 dS/m or ±10% (whichever is greater)
Temp±1 °C
ResolutionEC: 0.001 dS/m
Temp0.1 °C
Output ProtocolSDI-12 or DDI serial
Compatible Data LoggersMETER ZL6 series or any SDI-12–compliant logger with 3.6–15 VDC excitation
Dimensions10.9 cm (L) × 2.4 cm (W)
Cable5 m standard (custom up to 75 m)
Connector3.5 mm stereo jack or tinned leads
Power Supply3.6–15 VDC
Current Draw20–28 mA (active), 0.03 mA (standby)
Startup Time100–250 ms (SDI-12 dependent)
Measurement Duration25–50 ms
ComplianceISO 9001:2015 certified manufacturing
CE marked per EM directive EN ISO/IEC 170502010
Mechanical Interface1-inch NPT threaded body with optional T-fitting for pipe mounting
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BrandLI-COR
OriginUSA
ModelLI-8250 Multi-Channel Automated Soil Greenhouse Gas Flux Measurement System
Dimensions38.5 cm L × 52 cm W × 18.5 cm H
Weight7.7 kg
Ingress ProtectionIP55
Operating Temperature–20 to 45 °C
Relative Humidity0–95% RH (non-condensing)
Data Storage8 GB internal
GPS Accuracy2.5 m CEP
Maximum Chamber Radius from Unit15.0 m (one tube per chamber)
Maximum Chamber Diameter Coverage30.0 m
Pump Flow Rate (chamber-to-unit)~2–3 L/min (diaphragm type)
Barometric Pressure Sensor Range20–110 kPa
Accuracy±0.4 kPa (50–110 kPa)
Resolution0.006 kPa
Power Input10–30 VDC
Typical Power Consumption4.8 W (standby), 15.6 W (sampling/moving), 18.2 W (peak)
Communication3× sealed RJ-45 Ethernet, Wi-Fi (2.4 GHz, 802.11 a/b/g/n/ac), USB-A (1 sealed for LI-870, 2 standard), RS-422 output (24 VDC, 115.2 kbps, 1.8 A max/port)
Chamber CompatibilitySDI-12–enabled long-term chambers (e.g., 8200-104 / 8200-104C)
chamber volume3955 cm³
soil measurement area317.8 cm²
Environmental Sensor SupportAir temperature (±0.3 °C), PAR/light (0–100 µA input, ±0.37% of reading + 8 nA), soil temperature & moisture (via SDI-12)
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BrandVELP
OriginItaly
ModelUDK 149
Instrument TypeKjeldahl Nitrogen Determinator
Nitrogen Determination Range0.1–200 mg
Distillation Time3–4 min/sample
Repeatability±0.5%
Sample Weight Capacity≤5 g
Nitrogen Recovery Rate≥99%
Power Consumption2100 W
Dimensions (W×D×H)380 × 416 × 780 mm
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BrandMETER
OriginUSA
ManufacturerMETER Group, Inc.
ModelTEROS 10
Measurement Principle70 MHz Frequency Domain Reflectometry (FDR)
OutputAnalog Voltage (1,000–2,500 mV)
VWC Range0–64% (soil), 0–70% (non-soil media)
Resolution0.001 m³/m³
Accuracy±0.03 m³/m³ (±3.0% VWC) in mineral soils with EC < 8 dS/m using generic calibration
Dielectric Constant Range1–80
Accuracy of εₐ±1 εₐ (1–40), ±15% of reading (40–80)
Operating Temperature−40 to +60 °C
Probe Length5.4 cm
Housing Dimensions5.1 × 2.4 × 7.5 cm (L×W×H)
Cable LengthStandard 5 m (custom up to 40 m)
Connector3.5 mm TRS jack or bare leads
Excitation Voltage3.0–15.0 VDC
Measurement Duration10–25 ms
ComplianceISO 9001:2015, CE (2014/30/EU & 2011/65/EU), EN 61326-1:2013, EN 55022/CISPR 22
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BrandMETER
OriginUSA
ManufacturerMETER Group, Inc. (formerly Decagon Devices)
ModelTEROS 11
Measurement Principle70 MHz Capacitive Dielectric Sensing
Output ProtocolSDI-12 / DDI Serial
ComplianceISO 9001:2015, EN 61326-1:2013, EN 55022/CISPR 22, CE Marked per 2014/30/EU & 2011/65/EU
Sensor Dimensions9.4 × 2.4 × 7.5 cm (L×W×H)
Probe Length5.5 cm
Cable LengthStandard 5 m (custom up to 75 m)
Operating Temperature−40 to +60 °C
VWC Range (mineral soil)0.00–0.70 m³/m³
VWC Accuracy (generic mineral soil cal)±0.03 m³/m³ (EC < 8 dS/m)
Temp Accuracy±1.0 °C (−40 to 0 °C), ±0.5 °C (0 to 60 °C)
Temp Resolution0.1 °C
VWC Resolution0.001 m³/m³
Dielectric Range1–80 (εₐ)
Frequency70 MHz
Power Supply4.0–15.0 VDC
Sleep Current~0.03 mA
Active Current (25 ms)3.0–16.0 mA
Interface3.5 mm TRS or bare-wire termination
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