Performance
- Minimum sensitivity: 3x10-5 fractional absorbance in about 15 seconds
- Accessible spectral region: 4 – 8 microns
- Additional wavelengths within 3 – 25 micron region upon request
- Simultaneous measurement of multiple molecular compounds
- Resolve closely spaced ro-vibrational features: 0.005 cm-1
- Laser temperature range: 70 K to 120 K
- Multi-pass cell pressure range: 1 to 100 Torr
- Instrument stability time: Greater than one minute
Functional
- Measure gas phase molecules possessing ro-vibrational states in mid-infrared region
- Perform isotopic ratio measurements
- Cryostat capable of accommodating two mid-infrared laser sources and a single photodetector
- Liquid nitrogen free cryogenic cooling system
- 36 m multi-pass gas cell
- Optional reference arm
- Unattended operation
- User software configurable absorption detection scheme
- - Direct absorption,1st, or 2nd harmonic detection
- Measured Species Quantification
- - Calibrated quantification using reference gas
- - Computed quantification using sensor calibration
- - Computed quantification from direct absorption
- Laser Control and Monitoring
- - Temperature tuning
- - Diode laser current tuning (sweep function)
- - Diode laser current modulation (wavelength modulation)
- - Automatically change between lasers
- Gas Cell Control and Monitoring
- - Continuous flow
- - Zero flow (trapped volume)
- - Pressure control
- - Temperature monitoring
Data Processing
- Spectral co-averaging
- Selectable filter options
- Analyze data subset(s) (windowing)
- Compute absorption magnitudes
- Compute absolute concentration
User Interface
- Windows environment
- Computer monitor, keyboard, and mouse
- External gas ports for sample introduction & sample exhaust
- USB communication ports (3)
- Serial communication port
Physical
- Dimensions: 28”L x 25”W x 17”H
- Weight: 200 lbs
- Utility requirements
- - Power: 115 V, 60 Hz / 220 V, 50 Hz
