The Gasmet DX4040 FTIR gas analyzer can detect up to 25 gases simultaneously providing validated results in 25 seconds. Fourier Transform Infrared Spectroscopy (FTIR) provides reliable measurements with low detection limits & true multi-compound analysis capability. The library of measured gases can be changed by the user through an easy to use interface, providing exceptional flexibility and ability to any measurement requirement in the field.

The flexibility of the DX4040 means that it is employed in a wide variety of applications including occupational safety, Hazmat, freight containers, anaesthetic gases, Greenhouse gases, breathing gas, research and many more. Below the video of Dr. Joseph Storlien (Assistant Professor of Environmental Studies, Saint John's University) talking about the benefits of the Gasmet DX4040 FTIR gas analyzer for measurements of trace greenhouse gas emissions from soil. Please listen to what he thinks about the versatility, sensitivity, accuracy, response speed and mobility of the instrument.


See Gasmet demonstration video of Greenhouse Gas Soil Flux measurements.


Measurement with the DX4040 is easy; sample gas is drawn into the analyzer with a built-in pump trhough a handheld particle filter and Tygon tubing. The analyzer runs in continuous mode, measuring time-weighted averages of user-definable length from one second to five minutes. The Gasmet DX4040 is capable of sub-ppm detection limits without using sorbent traps for sample pre-concentration, which guarantees fast response times. Zero calibration with clean air or nitrogen once a day is the only calibration required, carries gases, special test gases or other consumables are not needed.

Gasmet DX4040 can be used both in a backpack and table-top configuration. The user can move freely in the measurement site and record concentrations at different locations. With the standard library, the Gasmet DX4040 is capable of detecting 25 different gases simultaneously. The capabilities of the analyzer can be further enhanced with the Calcmet Pro -software, which gives the user the access to a reference library of over 250 gases and 50 gas measurement capability. This is especially useful in situations where unknown gases are encountered.

Both battery and 230 VAC operations are possible. In battery use, operating time is 2.5 hours in Bluetooth mode. There is a filter for particulates inside the probe and no sample preparation is needed. The lightweight analyzer (weight ~14 kg with battery) can be used with or without the durable Teflon coated backpack.



  • Cost effective: no consumables, stable calibrations, low maintenance costs
  • Easy-to-use solution: single button operation and on screen instructions
  • Portability: battery operation and wireless communication
  • Rapidness: no sample preparation, shortest measuring time is only five seconds
  • Post-measurement analysis and unknown identification from huge Gasmet reference collection


Gasmet DX4040 is standard equipped with an IP67 rated PDA (Personal digital assistant) and Calcmet Lite software. Large touchscreen buttons and keypad are easy to use even in demanding field conditions. The communication between the analyzer module and PDA is wireless with Bluetooth protocol. Built-in GPS and digital camera can be used to link measurements to geographic coordinates and a photograph of emission site. All measured data is stored in PDA and can be sent as e-mail messages with the built-in 3G modem and Wireless LAN adapter. Calcmet Lite allows simultaneous analysis of 25 gases. The results are shown literally with a touch of a button on the screen of an industrial grade PDA and can be easily transferred to a PC/Laptop with USB connection.



Calcmet™ DX4040 Std

  • Gasmet Reference Library (250 gases)
  • Possibility to identify unknown compounds
  • Reconfiguration of PDA analysis settings for 25 gases

Calcmet™ DX4040 Pro

  • Possibility to measure 50 gases simultaneously with PC via RS-232 port
  • Gasmet Extended Reference Library including over 5000 gases
  • Identification of gas components using library search routine
  • Possibility to use NIST library
  • Single user licence protected with HASP USB key

Watertight protective transit case 

Additional battery and desktop charger

Gasmet Smart battery has charge indicator LED's and further diagnostics can be done via USB cable from the charger. The battery can be charged both inside the analyzer and via a separate charger.


  • Industrial hygiene - Workplace Air Quality measurement of volatile organic compounds for regulatory compliance testing
  • Hospitals - Anesthetic gases, sterilizer gases, laboratory solvents
  • Leak detection - VOCs, Freons, inorganic gases etc.
  • Fumigants - Detection of residual fumigants in cargo sea containers
  • Soil gas measurements - Identification of chlorinated hydrocarbons and BTEX at remediation sites
  • Greenhouse gas soil flux measurements
  • First responders & HAZMAT teams - Identification and quantification of Toxic Industrial Chemicals (TICs) and Chemical Warfare Agents (CWAs)

Technical Data

DX4040 FTIR Gas Analyzer

General Parameters
Measuring principle: Fourier transform infrared, FTIR
Performance: Simultaneous analysis of up to 25 gas compounds (PDA), 50 gas compounds with optional Calcmet software
Response time, T90: Typically < 120 s, depending on the gas flow and measurement time
Operating temperature: Ambient temperature
Short term 0 – 40 °C
Long term 5 – 30 °C
Storage temperature: 10 – 35 °C, non condensing
Shipping temperature: -20 – 45 °C during 12 hours, non condensing
Power supply: 115 / 230 VAC
Battery functioning time: Approximately 2.5 hour operation time with Bluetooth ON (dependant of ambient temperature).


Resolution: 8 cm-1
Scan frequency: 10 scans / s
Detector: Peltier cooled MCT
Source: SiC, 1550 K
Beamsplitter: ZnSe
Window material: ZnSe
Wave number range: 900 - 4 200 cm-1


Sample Cell  
Structure: Multi-pass, fixed path length 9.8 m
Material: 100 % rhodium coated aluminum
Mirrors: Fixed, protected gold coating
Volume: 0.4 liters
Temperature: Ambient


Measuring parameters
Zero point calibration: 24 hours
Zero point drift: < 2 % of measuring range per zero point calibration interval
Sensitivity drift: None
Linearity deviation: < 2 % of measuring range
Temperature drifts: < 2 % of measuring range per 10 K temperature change
Pressure influence: 1 % change of measuring value for 1 % sample pressure change. Ambient pressure changes measured and compensated.


Electrical connectors
Digital Interface: Bluetooth protocol & RS-232
The analyzer is connected to a PDA with Bluetooth connection (RS-232 optional). The PDA provides the analysis results.
Option: Sample spectra transfer to laptop (PC) for additional analytical capabilities


Gas inlet and outlet conditions
Gas temperature: Ambient temperature (0 – 50 °C), non-condensing
Gas filtration: Filtration of particulates included in the sample probe
Sample gas pressure: Ambient
Sample pump: Flow ~1.5 l/min, for ambient air only


A/D converter: Dynamic range 95 dB
Signal processor: 32-bit floating point DSP


Analysis software (PDA)
Operating system:  Windows Mobile 6.1 Professional
Analysis software:  Calcmet Lite


Software: Calcmet software with DX4040 Pro key. Laptop PC + Windows 7 (32-bit) required. For more information read Calcmet Technical data.


Additional information
Enclosure: Polyurethane
Weight: 13.8 kg (with battery)
12.4 kg (without battery)
CE label: According to EMI guideline 89/336/EC


Gasmet Technologies Oy shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is provided “as is” without warranty of any kind and is subject to change without notice. Should you find any errors, we would appreciate if you notified us.