IR29 Transmitter

The IR29 uses non-dispersive infrared (NDIR) sensor technology to detect combustible gases and vapors. 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 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.

Key features at a glance:

General information:

• Measuring principle: infrared (IR)
• For combustible gases and vapors
• 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 2G Ex eb mb ib [ib] IIC T4 Gb

Optionally available:

• Pressure and humidity sensors, ex-proof control unit RC2, impact protection, flow adapter, calibration adapter, protection plate, dust filter, weatherproof housing, flow adapter