IR29 Di Transmitter

With display and intrinsic safety for flammable gases and CO2


If flammable gases and vapours or carbon dioxide are to be monitored in Ex zones, the IR29 Di transmitter is a reliable and robust solution. The IR29 Di transmits measured values and status displays in analogue form (4-20 mA). In addition, measured values are shown on an LC display. The connection is made via a safety barrier (SB1, SB1 D or Zener barrier) to prevent the ignition of power lines within the Ex zone. In combination with GfG's proven controllers, installation in new gas detection systems as well as retrofitting in existing systems is possible.

The IR29 Di uses non-dispersive infrared (NDIR) sensor technology to detect combustible gases and vapors as well as carbon dioxide. For selective measurement results without false alarms, our patented 4-beam and 4-wavelength technology with gold-plated mirror optics is used, which dispenses with beam splitters altogether. The infrared sensors used also enable measurements above the lower explosion limit (LEL), do not require oxygen and are insensitive to sensor poisons. The long-life sensors make the IR29 Di a permanently reliable solution for detecting a wide range of combustible gases and vapors in the measuring ranges 0 to 100 % LEL as well as CO2 in the measuring range 0 to 10 % by volume. Automatic temperature compensation and linearization of the measurement signals ensure high measurement accuracy.

Communication and service
Signal transmission is according to the 4-20 mA industry standard. The transmitter indicates operating states via two status LEDs. The currently measured gas concentration can be read on the LC display. Depending on the installation location, this can also be selected as a rotatable version. Service and adjustments are carried out on site using the optional RC2 remote control or the RC3 IR remote control (one-man adjustment). The IR29's self-monitoring feature increases instrument safety between maintenance intervals. Test gases can be added for function control and adjustment using a calibration adapter.

Safety and instrument protection
The IR29 Di is ATEX-certified for use in Ex zone 0. It complies with the intrinsic safety "i" standard, which is required for use in numerous industrial plants and in mining. The V4A stainless steel and poly-carbonate housing is protected against dust and water ingress (protection class: IP67). Accessories available include a guard plate and dust filter.

 

Key features at a glance:


General information:

  • Measuring principle: infrared (IR)
  • for combustible gases and vapors, carbon dioxide
  • intrinsically safe
  • insensitive to sensor poisons
  • expected sensor lifetime: 6 years
  • color display (optional: rotatable by 180°)
  • signal transmission: 4-20 mA
  • protection class: IP67 (with rotatable display: IP40)
  • integrated data logger

Approvals / Certifications:

  • ATEX certification: II 1G Ex ia IIC T4 Ga

Optionally available:

  • safety barrier, pressure and humidity sensors, ex-proof control unit RC2, impact protection, flow adapter, calibration adapter, protection plate, dust filter, weatherproof housingflow adapter

Detectable gases

LEL combustible gases
C2H2 Acetylene
C2H4 Ethylene
C2H6O Ethanol
C3H8 Propane
C3H8O n-Propanol
C4H10 n-Butane
CH4 Methane
CO2 Carbon dioxide
Other gases on request.

Downloads

Extensions and accessories

SB1

SB1


Two-channel safety barrier for intrinsically safe transmitters
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Weatherproof housing

Weatherproof housing


Weatherproof housing for various transmitters
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Test gases

Test gases


You can find an overview of our test gases here
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Accessories IR29 Di

Accessories IR29 Di


Here you'll find the complete list of accessories for the IR29 Di
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