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CO2 Analyzer

Available on backorder

Features:

The LI-7000 provides high performance in an easy-to-use platform. The design is based on years of development and customer input. Numerous innovative features make the LI-7000 an excellent choice for high-precision measurements and long-term monitoring applications, including:

  • USB communications for simple plug-and-play setup, operation, and data collection.
  • RS-232 communication for interfacing with data loggers and computers.
  • A long life, vacuum sealed tungsten filament source. This source has low power consumption, and is highly stable.
  • Nickel-plated optical cells minimize water sorption.
  • The optical cells can be removed and cleaned in the field without requiring factory recalibration.
  • Sampling cells and internal chemicals are in easily accessible areas of the analyzer. This minimizes the need for factory service, saving you down time and money.

Specifications:

  • Type: Differential, non-dispersive infrared gas analyzer.
  • Detectors: Two solid-state detectors; one each for CO2 and H2O, filtered at 4.255 and 2.595 microns, respectively.
  • Chopping Frequency: 600 hertz.
  • Source: Single source.
  • Optical Bench: One optical bench. Sample cell size: 9.53 mm Dia. x 152.4 mm L (3/8″ x 6″). Volume: 10.86 cm3.
  • Warm-up Time: Approximately 2 minutes to operation; 2 hours to temperature equilibration.
  • Gas Pressure: Maximum allowable pressure is 115 kPa (17 psi) with pressure sensor connected. 200 kPa (29 psi) max. w/o pressure sensor connected.
  • Maximum Flow through Analyzer: >50 liters/min.
  • Internal Pump: Yes – variable; up to 1 liter/min.
  • Display: 40 character x 8 line backlit LCD. 3 numeric screens available.
  • Graphing: 3 graphing screens available with 1-3 graphs per screen.
  • Back Panel Connections:
    • USB: 2.0 compliant, up to 50 Hz.
    • RS-232: 9600-115200 baud, 8, N, 1. Supports XON/XOFF and trigger input.
    • Analog: 4 user-scalable 14 bit DACs, 20 Hz bandwidth at 300 Hz update frequency.
    • Auxiliary Input Channels: 2, ±2.5V, 10 Hz bandwidth.
  • Tubing Connections: Swagelok
  • Power Requirements: 100-240 VAC, 50-60 Hz, or 10.5-16 VDC, 4 amps max.
  • Power Consumption: 15-40 Watts (dependent on ambient temperature and pump usage).
  • Temperature Range: 0-50 °C ambient, 0-55 °C bench.
  • Size: 5″ H x 9.875″ D x 14.5″ L (12.7 x 25 x 36.8 cm).
  • Weight: 19.4 lbs. (8.8 kg).

CO2 Specifications

  • Range: 0-3000 ppm
  • Accuracy: Within 1% nominally.
  • Zero Drift (with temperature): ±0.3 ppm/°C.
  • Span Drift: ±0.2% of reading/°C.
  • Water Sensitivity: <0.1 ppm CO2/mmol/mol H2O (Software algorithm corrects for band broadening effects).
  • Calibration: Factory linearization over 0-3000 ppm range using NIST-traceable standard gases.
  • Pressure Range: 0 to 115 kPa absolute.
  • Display Resolution: 0.01 µmol/mol.
  • Signal Noise: See Table 1.

H2O Specifications

  • Range: 0-60 mmol/mol. Optical bench and interconnecting hoses must be maintained above the dew point temperature by the user.
  • Accuracy: 1%.
  • Zero Drift: ±0.02 mmol/mol/°C.
  • Span Drift: ±0.4% of reading/°C.
  • Signal Noise: See Table 1.
Noise Specifications (Typical)
CO2 (370 ppm) H2O (10 mmol/mol)
Average Time (s) Bandwidth (Hz) RMS Noise (ppb) Peak-to-Peak (ppb) RMS Noise (ppm) Peak-to-Peak (ppm)
20 0.025 6 39 0.4 3
1 0.5 25 173 2 12
0.5 1 35 245 2 17
0 20 157 1096 11 75

 

Catalogue: PDF

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