Gasmet Technologies



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.

Measurement with the DX4040 is easy; sample gas is drawn into the analyzer with a built-in pump through a handheld particle filter and Tycon 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 back-pack 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 (weigth ~14 kg with battery) can be used with or without the durable Teflon coated backpack.

AREAS OF APPLICATION: Industrial hygiene - Workplace Air Quality measurement of volatile organic compounds for regulatory compliance testing. Hospitals - Anesthetic gases, sterilizer gases, laboratory solvents. Leak detection - VOC`s, 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)


  • Cost effective: no consumables, stable calibrations, low maintenance costs
  • Easy-to-use solution: single button operation and on screen instruction
  • 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

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. Battery can be charged both inside the analyzer and via separate charger.


General Parameters
Measuring principle
Fourier transform infrared, FTIR
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 Non-condensing
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).
8 cm-1
Scan frequency
10 scans / s
Peltier cooled MCT
SiC, 1550 K
Window material
Wave number range
900 - 4 200 cm-1
Sample Cell
Multi-pass, fixed path length 9.8 m
100 % rhodium coated aluminum
Fixed, protected gold coating
0.4 liters
Measuring parameters
Zero point calibration
24 hours
Zero point drift
< 2 % of measuring range per zero point calibration interval
Sensitivity drift
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.
Sample spectra transfer to laptop (PC) for additional analytical capabilities
Gas inlet and outlet conditions
Gas temperature
Ambient temperature (0 – 50 °C), noncondensing
Gas filtration
Filtration of particulates included in the sample probe
Sample gas pressure
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
Calcmet software with DX4040 Pro key. Laptop PC + Windows 7 (32-bit) required.
Additional information
13.8 kg (with battery), 12.4 kg (without battery)
161x390x406mm (HxWxD)
CE label
According to EMI guideline 89/336/EC