IR29 i Transmitter

Intrinsically safe transmitter for flammable gases


If flammable gases and vapours need to be monitored in Ex zone 0, the intrinsically safe IR29 i transmitter is a reliable and robust solution. The IR29 i uses an analogue (4-20 mA) signal to transmit measured values and status information. It is connected 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 reliable controllers, it can be installed in new gas detection systems or retrofitted into existing ones.

The IR29 i uses non-dispersive infrared (NDIR) sensor technology to detect combustible gases and vapours. Our patented 4-beam and 4-wavelength technology with gold-plated mirror optics, which do not require any beam splitters, is used to ensure selective measurement results without false alarms. The infrared sensors used also enable measurements above the lower explosion limit (LEL), do not require oxygen and are not susceptible to sensor poisons. The long-life sensors make the IR29 i a permanently reliable solution for detecting a wide range of combustible gases and vapours in the 0 to 100 % LEL measuring range. Its automatic temperature compensation and the linearization of the measurement signals ensure high measurement accuracy.

Communication and service
The IR29 i communicates on the 4-20 mA industry standard signal. Two status LEDs are used to indicate its operation status. If you use one of our safety barriers with display, measured values and status indications can also be read safely outside the Ex zone. Service and adjustments are performed on site using the optional RC2 remote control (one-person adjustment). The IR29 i's self-monitoring function increases device safety between maintenance intervals. Test gases for function tests and adjustments can be inserted using a calibration adapter. 

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

 

Key features at a glance:


General information:

  • Measuring principle: infrared (IR)
  • For combustible gases and vapours
  • Intrinsically safe
  • Not susceptible to sensor poisons
  • Expected sensor lifetime: 6 years
  • Signal transmission: 4-20 mA
  • Protection class: IP67
  • 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 housing, flow 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


Two-channel safety barrier for intrinsically safe transmitters
» more

Weatherproof housing


Weatherproof housing for various transmitters
» more

Test gases


Find an overview of our test gases here
» more

Accessories IR29 i


Find the complete list of accessories for the IR29 i here
» download PDF

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