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FTIR 1900

Measured component

Over 400 gases, including TIC, and VOC

Band range

600-5000cm-1 (expandable)

Lower limit of measurement

ppm- percent level


Independently designed Michelson interferometer

Instrument Introduction

EXPEC 1900 FTIR gas telemetering instrument plots the spatiotemporal distribution of toxic and harmful gases. It has visible visual imaging, night vision infrared imaging and chemical imaging functions, where the chemical imaging is realized with the advanced quick FTIR remote sensing technology. The instrument obtains the infrared spectra of the atmosphere in the target area through passive FTIR remote detection, and scans the infrared absorption spectra of the gases in the target area to qualitatively determine the gas components, quantitatively calculate the gas concentrations and plot chemical images based on the infrared fingerprint spectra of the gases using the deep neural network algorithm.

This instrument is especially suitable for circumstances where dangers cannot be determined. It helps users carry out risk assessment for the target object in a remote and non-contact manner, determine the chemical components of gas and corresponding concentrations, and master the distribution and diffusion situations of the gas on a large spatial scale. It is an effective technical guarantee in numerous fields such as environmental protection, safety monitoring, fire prevention, public security, petroleum chemical industry, and transportation, protecting the safety of people's lives and property and the ecological environment safety.

Technical Parameters



The chemical imaging with FTIR remote sensing as the core is combined with the visible/infrared video imaging, to disclose problem points and risk sources in the form of images. The instrument displays the cloud cluster size, concentration gradient, motion path and temperature gradient field of gas. It provides timely data basis for overall management of pollution sources and decision making for emergencies


The instrument can achieve all-weather fully-automatic visual angle patrol scanning. It provides watching and monitoring at fixed time and location for key areas, and can give automatic warning if finding abnormality. The instrument can automatically trace cloud clusters, to lock and display the position of a leakage source. It can clearly display the observed gas components and concentrations.

Wide coverage

The instrument provides 360° full visual angle coverage, 60° vertical scanning, a routine measurement radius of 5 km and the maximum range of visibility of about 20km. A full-area coverage can be achieved at the high point of visual field.

High detection accuracy

The instrument uses a research-grade MCT infrared detector based on Stirling refrigeration (-200°C), coupled with a high-resolution FTIR optical remote sensing system and a patented data processing algorithm, enabling ppm level detection capability.

Strong detection function

The instrument contains a standard spectrogram database of over 400 gases, including inorganic and organic gases from various chemical pollutants and combustion products, which can be expanded for customer requirements. In principle, it can detect tens of thousands of gases.

Mobile for emergency

The instrument is in an on-board mode, so it can quickly arrive at an accident scene, to determine the components and concentrations of toxic and harmful gases in a remote manner, providing reliable data support for emergency response actions.

Key Technology

Infrared/visible dual-pickup-camera imaging system

  • Starlight-level visible pickup camera with high sensitivity and high dynamic range, with 24-hour monitoring
  • Infrared imaging system, capturing polluting gas clusters and high temperature heat sources unidentifiable by human eyes

360° scanning PTZ and 2D rotary galvanometer

  • Automatic 360° full-coverage visual angle, 120° × 60° galvanometer, achieving quick 2D rotary scanning; allowing to set key areas for scanning;
  • Diamond-like long-life shielding window, providing IP54 protection that meets the weathering requirement for outdoor operation, to protect

Cassegrain large-aperture light
concentration system

  • Optical lens set, comprising gilded reflector and infrared high antireflection film;
  • 120 mm large-aperture light concentration
    system, 6 mrad high-precision visual angle

FTIR spectrometer, as main unit

  • Coaxial double-moving-mirror interference
    spectroscopic system;
  • MCT low-noise mid- and far-infrared band
    sensor based on Stirling refrigeration (-200°C);
  • Dual-blackbody calibration system for metrological traceability;
  • TEC temperature-controlled and
    frequency-stabilized VCSEL semiconductor solid laser, with a stable wavelength, and
    extended 5 times life;

1000M data acquisition and processing module

  • 216k high-speed Fourier interference signal acquisition, 24-bit analog-to-digital conversion (ADC);
  • FPGA+ARM dual-core architecture, 3.2G high-speed signal processing;
  • Patented deep neural network analysis algorithm;
  • Processing and fusion of three paths of video stream from infrared visual imaging, visible visual imaging and chemical imaging;

Intelligent Software

  1. Supporting self-built cloud and public cloud, with data automatically uploaded to the server, to facilitate joint operating of multiple computers, assisted analysis by external experts and interface with environmental protection and monitoring authorities;
  2. The images from visible imaging, infrared imaging and chemical imaging are clearly displayed in a combined manner;
  3. The measurement data is saved in detail, and is traceable (including spectra, pictures, compound types, position, and time);
  4. User defined scanning mode, satisfying personalized detection demands;
  5. Continuously expanded spectra database (mainly established for industrial toxic substances and pollutants), currently covering absolutely most main polluting gases.


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