A versatile solution for monitoring gases - especially for the semiconductor industry

The D-ReX was designed specifically for the requirements of the semiconductor industry, but will also significantly increase the safety of any other application where toxic, corrosive or combustible gases need to be monitored.


One system for every requirement
The D-ReX is a standalone gas detection device for a variety of different applications. The diffusion version monitors atmospheric gases at the Point of use (PoU). Gases in places that are hard or impossible to reach, such as pipe systems, can be monitored with an external sensor up to 1200 meters away from the Point of Installation (PoI). If you need to sample gases from another room, a gas cabinet or a closed system – the Point of Sampling (PoS) – and check it in a safe environment, our D-ReX with integrated pump is the best choice. For gases that require a pyrolyzer, we offer the additional Py-ReX module.


State of the art gas monitoring

The D-ReX can easily be integrated into your current system thanks to its Power over Ethernet (PoE) communication and power supply and the (optional) LonWorks integration. The full color display will clearly and concisely indicate all information on the measured gas concentrations, threshold values, faults and alarms.


Smart sensors and simple service
Choose between electrochemical, catalytic and infrared sensors for more than 30 toxic, corrosive and combustible gases and oxygen. All sensors are preconfigured and come inside easily replaceable sensor cartridges. The corresponding app connected via Bluetooth facilitates servicing and thus minimizes downtimes as well as costs.

Different options for increasing safety
Every D-ReX can optionally be equipped with five internal relays (with one freely programmable changeover contact each) which are used for the implementation of security procedures. If your application requires more relays, they can be connected via one of our optional GfG relay modules. The GMA200-RT offers 16 relays with changeover contacts, is available with or without display and can be mounted either on DIN rails or walls.


Clear information
The large TFT color display will supply you with all necessary information on the measured gas, the measured concentration, the condition of the gas detector and any errors in clear plain text, so you can react immediately. The display can be set to English, German and up to four other languages. You can control the device with the Bluetooth connected app or using the 5 button interface next to the display.


Communication just the way you need it
To meet the standards of the latest device connectivity options, the D-ReX is equipped with a PoE enabled LAN interface with 10/100 Mbits/s for safe and fast transmission of data. This allows you to address the D-ReX both from your network and from the internet. Alternatively, we also offer versions for analog integration into 4-20mA infrastructures or digital communication via the reliable RS-485 industry standard connection (Modbus).

Key features at a glance:

One System  so many possibilities:

  • PoU: Gas detection using diffusion
  • PoI: External sensor (cable length of up to 1200 m)
  • PoS: Integrated pump (tube length of up to 30 m)


  • Power over Ethernet
  • Bluetooth
  • Full-color 2.4“ display
  • 11 colored status LEDs
  • Housing for DIN rail mounting (TS35)


  • Protection rating IP30-IP64*
  • Line Integrity Monitoring (only on D-ReX PoS)
  • Flange saddle for monitoring inside pipe systems (only on D-ReX PoI)
  • LonWorks
  • 5 internal relays
  • Relay module for expansion (16 additional relays)
  • D-ReX pyrolyzer Py-ReX (only on D-ReX PoS)


*depending on model variant

Measured gases

AsH3 Arsine
B2H6 Diborane
Br2 Bromine
Cl2 Chlorine
ClF3 Chlorine trifluoride
ClO2 Chlorine dioxide
CO Carbon monoxide
CO2 Carbon dioxide
COCl2 Phosgene
ETO Ethylene oxide
F2 Fluorine  
GeH4 Germanium
H2 Hydrogen
H2S Hydrogen sulfide
HBr Hydrogen bromine
HCl Hydrogen chloride
HCN Hydrogen cyanide
HF Hydrogen fluoride
HMDS Hexamethyldisilazane
N2H4 Hydrazine
N2O Nitrous oxide
NH3 Ammonia
NO Nitric oxide
NO2 Nitrogen dioxide
O2 Oxygen
O3 Ozone
PH3 Phosphine
SeH2 Hydrogen selenide
SiH4 Silane
SO2 Sulfur dioxide
TEOS Tetraethyl orthosilicate
TMB Trimethyl borate
LEL Combustible gases and vapors
C4F6* Hexafluorobutadiene
C5F8* Octafluorocyclopentene
CH3F* Methyl fluoride
NF3* Nitrogen trifluoride
SF6* Sulfur hexafluoride
More gases on request | * Gases which additionally require the D-ReX pyrolyzer Py-ReX




Relay module with 16 relays for expanding the D-ReX’s functionality
» more


Relay module with display for expanding the D-ReX’s functionality
» more


Wall-mounted relay module for expanding the D-ReX’s functionality
» more

D-ReX Accessories

List of accessories for the D-ReX
» download PDF (available soon)

Our experts are happy to answer your questions! How to find us