GfG Instrumentation 2901-23-006 IR29 e Series Fixed Transmitter, N-Butane, no Display, 4-20 mA, with Pressure, Humidity Comp., IP67, 0-100% LEL Range

Ex-proof IR transmitter for combustible gases

If you need to monitor combustible gases and vapors in Ex zones, the IR29 transmitter is a reliable and robust solution. It uses an analog (4-20 mA) signal to transmit measured values and status information. Gases are monitored either on-site by diffusion or via unpressurized gas supply with a flow adapter. In combination with GfG's reliable controllers, the IR29 can be installed in new gas detection systems or retrofitted into existing ones.

The IR29 uses non-dispersive infrared (NDIR) sensor technology to detect combustible gases and vapors. For selective measurement results without false alarms, 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 a permanently reliable solution for detecting a wide range of combustible gases and vapors in the 0 to 100 % LEL measuring range. 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. Operating states are indicated by the transmitter via two status LEDs. Service and adjustments are carried out on site using the optional RC2 remote control (one-person adjustment). Self-monitoring of the IR29 increases device safety between maintenance intervals. Measured values and events are automatically recorded by the transmitter in an internal ring buffer. Test gases can be added for function control and adjustment with a calibration adapter. 

Safety and instrument protection

The IR29 is ATEX-certified for use in Ex zone 1. It complies with the increased safety "e" and encapsulation "m" standards. The housing made of V4A stainless steel and poly-carbonate is protected against ingress of dust and water (protection class: IP67). Accessories include a guard plate and dust filter.

Features:

• Measuring principle: infrared (IR)
• Measuring gas: N-Butane
• Not susceptible to sensor poisons
• Expected sensor lifetime: 6 years
• Signal transmission: 4-20 mA
• Protection class: IP67
• Integrated data logger
• Range: 0 - 100% LEL

Approvals / Certifications:

• ATEX certification: II 2G Ex eb mb ib [ib] IIC T4 Gb

For more information, please see Data Sheet and Manual