• Ffor measurement of: dust concentration, volume flow, temperature and pressure. Conversion to norm conditions for dust concentration and volume flow
• Measuring ranges: 0...10 upto 0...20 mg/Nm3; 0...200000 Nm3/h; 0...300°C; 900...1200 hPa
• Remote operation via bus-interface up to 1000 m; Connection to PLS possible.
• Typical applications: dust and volume flow measurements in Heating plants, Glass Works, Steel and Smelting Plants and for Filter monitoring.

Single-rod measurement probe for the simultaneous measurement of
- Dust concentration [mg/Nm³]
- Volume flow [Nm³/h]
- Temperature [°C]
- Absolute pressure [hPa]
Only one probe / mounting aperture in flue-gas duct Operation and evaluation unit can be connected at up to 1000 m distance via bus interface
For measurements according to the TA Luft emission standard, 13., 17. and 27. BImSchV

The combined probe measures four different quantities simultaneously.

The dust concentration is determined according to the tribo-electric measuring principle. The tribological probe measures the charge on the particles that strike the rod. Due to the measurement principle, this charge flow is, without any compensation calculation, dependent on the flow velocity and the concentration of the dust in the flue gas.

The measurement of the volume flow works on the differential-pressure principle. For this the probe has two chambers separated from one another, between which a pressure difference is established in the directional approaching flow. Due to the special shape of the probe, the largest possible differential pressure is produced and the linearity of the measurement signal referred to the flow is guaranteed.

The absolute pressure in the flue gas is sampled in one chamber of the probe and measured by a piezo-resistive pressure transmitter.

The temperature is measured in a separate chamber within the probe directly in the core flow of the flue gas by a Pt100 resistance thermometer. The raw data is processed locally at the measuring point and transferred via a bus interface up to 1000 m to an operating and evaluation unit with display or to a process control system.

The D-RX 250 Combined Sample Probe is used for continuous monitoring of dust concentrations in flue gas ducts, dust extraction pipes, etc. In addition to the measurement of dust concentration, the volume flow, temperature and the absolute pressure in the flue is measured. These measurements enable the figures to be converted to normal conditions.