Measuring system for ultra-sonic measuring of flow and volume flow, especially for wet and aggressive smoke emissions

Measuring principle
The D-FL 220 measuring system works according to the acoustic transit time differential method. Two identical transducers mutually send and receive short ultrasonic pulses. The system calculates the precise gas velocity from the direction-dependent transit time difference. The flow velocity respective volume flow of the waste gas is precisely calculated from the transit time difference dependent on the direction.

Features
● Non-contact measuring method
● Measurement possible below dew point and for high dust concentrations
● Continuous measurement of normal volume flow and gas velocity
● Automatic zero point and reference point control
● Convenient operation via remote access with web interface
● Operation with or without control unit
● Very low maintenance

Applications
● Volume flow measuring at low speeds
● Plants with damp and/or aggressive exhaust gas, e.g. in waste incineration plants
● Volume flow measurement at high dust content

Approvals
● Suitability-tested by the TÜV Cologne, test report 936/21218490/A
● Approved and certified acc. to EN 15267-3
● MCERTS

System components
● 2 Measuring heads
● 2 Purge air flanges
● 2 Mounting flanges
● Purge air unit
● Terminal Box for power supply

Options
● Temperature transducer
● Absolute pressure transducer
● Universal operating unit D-ISC 100
● D-ESI 100 Service- and Parameterisation Software

measurements: gas velocity and direction, volume flow in norm conditions or operational conditions
measuring ranges: 0 ... 3000000 m3/h / 0 ... 40 m/s
measuring principle: acoustic propagation delay
flue gas temperature: 0 ... 300 °C
flue gas pressure: -50 ... +20 hPa
duct diameter: 0.5 ... 13 m, temperature dependent
ambient temperature: -20 ... +50 °C, measuring head -40 ... +70 °C
protection: IP65
measuring outputs: 0/ 4 ... 20 mA/ 400 Ohm, Modbus RTU bi-directional
digital outputs: 2 relay outputs, permissible load 48 V/ 0.5 A
detection limit: <0.3% of measuring range
power supply: 24 VDC, 0.5 A
dimensions (h x w x d): measuring head housing: 113 x 84 x 188 mm
weight: 17 kg

purge air supply
purge air quantity: 40 m3/h (50 hPa) / 60 m3/h (25 hPa)
power supply: 115/ 230 V, 50/ 60 Hz, 0.37/ 0.43 kW
dimensions (h x w x d): 350 x 550 x 500 mm
weight: 12 kg
protection: IP55