D-RX 250 Combined Sensor Probe
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PRODUCT DESCRIPTION
The D-RX 250 Combined Sensor Probe from the DURAG Group is a single-rod measurement probe for the simultaneous measurement of dust concentration, volume flow, temperature and absolute pressure. The combined sample probe is used for continuous monitoring of dust concentrations in flue gas ducts and dust extraction pipes.
In addition to the measurement of dust concentration also measured is the volume flow, temperature and the absolute pressure in the flue. These measurements enable the figures to be converted to normal conditions.
The probe of the D-RX 250 Combined Sensor Probe consists of a probe profile according to VDI 2066-1, mounted in the stack path using a flange that is connected to the stack. The probe is built in isolation due to the tribo-electric measurement and contains two chambers for the measurement of differential and absolute pressure. In the third chamber, the gas temperature is measured.
The raw data is processed locally at the measuring point and transferred via a bus interface (Modbus, CAN-Bus or similar) up to 1000 m to an operating and evaluation unit with display or to a process control system.
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PRODUCT SPECIFICATIONS
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measurements
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dust concentration, volume flow, absolute pressure, temperature
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measuring ranges
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0–10 ... 0–500 mg/Nm3
0–9,999,999 Nm3/h 1)
0–2000C, optional 0–3500C
900–1,300 hPa
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measuring principle
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dust: tribo electric volume flow: differential pressure
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flue gas temperature
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above dew point up to 2000C, optional up to 3500C, flue gas humidity <80%
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flue gas pressure
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-200 up to 200 hPa
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duct diameter
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0.3–4 m
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ambient temperature
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-20 up to +500C
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protection
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IP65
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measuring outputs
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4x 0 / 4–20 mA / 500 Ohm, Modbus RTU (RS485)
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digital outputs
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7 relay outputs, permissable load 250 V / 100 VA
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digital inputs
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6 potential free inputs
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accuracy
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<2% of measuring range
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detection limit
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<2% of measuring range
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reference point drift
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<1% of measuring range/month
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zero point drift
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<1% of measuring range/month
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supply voltage
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115 / 230 VAC, 50 / 60 Hz, 50 VA
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dimensions (h x w x d) probe length
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probes: 180 x 180 x (340 + probe length) mm 250, 400, 700, 1000 mm
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weight
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probe 9.5 kg electronics 22 kg
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probe back purging (option)
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purge air supply 3 bar
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insulator purging (option)
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continuous purge air supply approx. 2 m3/h
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remarks
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1) flue gas velocity >5 m/s concentration after gravimetric accuracy <2% of measuring range calibration
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HEAD OFFICE
Unit 5A, 2 Resolution Drive
Caringbah, NSW 2229
Australia
Ph: 61 2 9531 5444
Fax: 61 2 9531 5411
sales@learsiegler.com.au
