System components D-R 290

Measuring head

The transmitter and receiver optics are integrated together with the electronics to form a compact unit housed within a rugged and robust aluminum enclosure. The measuring head is mounted on the weld-in flange.

Reflector

The reflector is installed in a rugged and robust aluminum housing. The reflector is mounted on the weld-in flange directly opposite the measuring head.

Purge air unit

A hose connects the measuring head and the reflector with the purge air unit. The filtered air is used to keep the scattered light interfaces of the measuring head and the reflector clean.

Optional:

Universal control and display unit D-ISC 100

The connected equipment is easy to configure and operate using the D-ISC 100 universal control and display unit. The display provides an immediate overview of the current measured values and the status of the measuring instruments.

Quick-closing shutters

The quick-closing shutters are mounted on the measuring head and the reflector side between the weld-in flanges and the connected devices (measuring head, reflector). In the event of a fault (failure of the power supply or purge air) they automatically close the path between the exhaust gas duct and the measuring equipment.

Electronics for quick-closing shutter

A control electronics system is required for each quick-closing shutter.

Measured value acquisition

In the simplest case the measured values and reference values are transferred to the plant's control system. The measured values and status signals that are output can also be fed to an emission calculator system for further processing, either via discrete signals (4 to 20 mA and configurable relay contacts) or via Modbus according to VDI 4201-3.

Weather protection covers

Weather protection covers are available to protect the measuring head, the reflector, the purge air unit and the terminal boxes when the measuring system is installed outdoors.

Additional options:

• Explosion proof version for Ex p, Zone 1 or Zone 2, 22
• Temperature compensation
• Filter set for sensitivity and linearity control