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- Durag D-FL 220T Ultrasonic Flow Velocity Monitor
Durag D-FL 220T Ultrasonic Flow Velocity Monitor
Update Terakhir
:
26 / 04 / 2021
PT. Surrama Tridaya Mandiri adalah perusahaan yang bergerak dalam bidang usaha importir , distributor alat-alat instrument : flowmeter, gas detector, control valve, safety valve, pressure reducing valve, dll
Detail Durag D-FL 220T Ultrasonic Flow Velocity Monitor
Durag D-FL 220T Ultrasonic Flow Velocity Monitor
air quality monitor
Measuring system for continuous evaluation of flow velocity and flow direction in tunnels. Ultrasonic sensors for tunnel ventilation control system. Reliable measurement across the tunnel profile. Two identical sensors alternately transmit and receive ultrasonic pulses. The system evaluates the transition times dependant on direction and calculates flow speed. D-FL 220T requires extremely low maintenance.
Overview
- stand-alone system, no control unit required
- simple configuration
- corrosion resistant against aggressive tunnel atmosphere
- sensors can be replaced quickly, no tools, no re-alignment required
- signal transmission
– per 4-20mA analog signal and 2 relays
– per RS 485 bus via MODBUS RTU protocol - minimized spare requirements
- extremely low maintenance
Technical Data
| measuring principle | evaluation of transition times of ultrasonic pulses dependant on direction and subsequent calculation of flow speed |
| measuring path | 1.2 - 25 m |
| orientation of measuring path | 30 - 60°C to tunnel axis, typically 45° |
| measuring range | -40 to 40 m/s
any interval can be assigned to analog output
default: 0-20 m/s |
| response time | > 1s … 180s, programmable |
| resolution | 0,1 m/s,
accuracy depends on: installation, path length, flow profile,
typ. < +- 0,2m/s bei 3m/s |
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