Spectra-1 Open Path Gas Monitor – Industrial & Environmental

Spectra-1, a portable lightweight open path TDLAS gas monitor uses proprietary hardware and software to provide a low cost open path gas sensing instrument. The enclosure for Spectra-1 was selected for its resistance to extreme shock and vibration. Spectra-1 can be used for portable as well as fixed site installations. RS232 serial communications are used for continuous data transfer. USB memory stick data downloading is used for logged data files. Applications include environmental monitoring, fugitive emission work, greenhouse gas reduction, fertilizer manufacturing, Ammonia, confined feeding operations monitoring, aluminum manufacturing HF monitoring, and landfill monitoring.


  • Aluminium Manufacturing
  • Fertilizer Production
  • Confined Feeding Operations
  • Environmental Monitoring
  • Greenhouse Gas Reduction Programs
  • Cold Storage, Ice Rinks
  • Landfill Operations

Spotting scope:

  • Spectra-1 alignment with retro-reflector
  • 2 X 20 character LCD display:
  • gas concentration
  • ppm or ppm-m
  • distance to retro-reflector
  • signal level bar graph
  • signal level % reading
  • configuration/menu display

Keypad for system configuration:

  • distance to retro-reflector
  • gas concentration – ppm or ppm-m
  • averaging time 1 to 600 seconds
  • maximum signal level set (i.e. 90%)
  • minimum signal level set (i.e. 5%)
  • RS232 com port setting (baud rate)
  • logging options
  • logged data transfer – USB memory stick
  • calibration settings (Factory set)
  • Spectra-1 settings output
  • display IP address

RJ45 Ethernet weatherproof connector
USB weatherproof connector
Sealed on/off power switch
Sealed RS232 com port
12 VDC @2A

Spectra-1 DSP Enhanced TDLAS Core

PKL Technologies Inc. has developed a Tuneable Diode Laser spectrometer “core”, which can be readily adapted to suit many applications. This “core” TDL spectrometer uses an industrial embedded computer, along with a custom low noise laser diode driver circuit. The DSP enhanced gas detection methodology has reduced the analog electronic components required by typical laser spectrometer devices. This reduces system complexity, ultimately lowering spectrometer costs.

Detectable gases include:
HF, HCN, O2, C2H2, C2H4, C2H6, H2O, CH4, NH3, CO, CO2, and H2S.


Spectra-1 Extractive Gas Monitor – Industrial & Environmental

Spectra-1 Extractive gas monitor features the same gas analysis software as used by the open path Spectra-1 monitor. Tuneable Diode Laser Absorption Spectroscopy (TDLAS) based gas sensing. Closed path internal multi-pass sampling cells are used instead of an open path configuration to calculate gas concentrations. 19′ rack mounted design. Options include internal sampling pump and 4-20mA output. Standard configurable RS232 data output.


  • Industrial Process Monitoring
  • Agricultural Confined Feeding
  • Classified (zone) Area Monitoring
  • Duct Monitoring
  • Stack Monitoring


  • gas specific – no false alarms
  • fast response
  • no water interference
  • reliable unattended performance
  • broad dynamic range
  • direct measurement of gas species – not indirectly inferred
  • no consumables or moving parts
  • software upgrades for performance enhancements
  • lower cost
  • keypad For System Configuration
  • internal multi pass optical sampling cell
  • gas concentration – ppm or ppm-m
  • averaging time 1 to 600 seconds
  • maximum signal level set (i.e. 90%)
  • minimum signal level set (i.e. 5%)
  • RS232 com port setting (baud rate)
  • logging options
  • calibration settings (Factory set)