Gauger, SmartScan50 and MonoScan all measure level in open channels and calculate flow.
Level to Flow conversion equations for flumes and weirs are a part the firmware.
Popular flumes and weirs are supported:
- Parshall flume
- Palmer Bowlus flume
- Khafagi Venturi flume
- Leopold Lagco flume
- H flume
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- General channel flow
- V-Notch weir
- Trapezoidal Cipolletti weir
- Rectangular contracted weir
- Rectangular suppressed weir
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European and American standards are both supported.
SmartScan50 and MonoScan can be configured for
m3/h and GPM units.
Gauger can be configured for
m3/h, cf/s, GPM, l/s and MGD units.
Use
SmartScan50 when these additional features are required:
- Totalization (accumulated flow)
- 5 relays including totalization counter (pulses per flow)
- 2-part system with the display at a distance from the measured wastewater
- Measuring flow in custom canals (by use of a strapping table)
Use
GaugerGSM or
Gauger485 when these additional features are required:
- General canal, channel, ditch and open pipe flows (Manning formula)
- Remote sites requiring wireless (GSM) reporting
- Remote sites requiring battery based operations
- Other types of flumes and weirs and additional unit types
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Why measure wastewater flow?
It is crucial to measure amount of wastewater flowing through channels as it
relats to cost and environment protection. Water purification plants may get
paid based on wastewater quantities. Manufacturing plants may pay for the amount
of effluent that the plant pours out. Municipalities may want to measure amount
of wastewater running through their sewer systems to prevent wastewater leakage
and check pipe overstressing.
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What is open channel flow?
Open Channel Flow (OCF) is flow driven by gravity and exposed. OCF refers to water
and wastewater. Water flow is found in agricultural distribution networks. Wastewater
flow is found in municipal sewer systems and water purification plants. Measuring
flow in open channels is obtained by routing the liquid through special structures,
flumes or weirs and using an hydrological or empirical equation to convert level
to flow.
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Why non-contact technology and why Ultrasonic level sensors?
Wastewater can not be measured efficiently over time by traditional contact sensors
(float, capacitance, bubblers etc.). With contact sensors, the waste sticks to the
devices and tampers with their performance. Non-contact measurement is the only
practical method. Ultrasonic level measurement is non-contact, cost effective safe
and is therefore preferred to expensive Radar technology. Radar technology is an
over-kill for this application. Radar technology also relate in some cases to
radiation health problems. Traditional flow meters for closed pipes are based on
the liquid filling the cross section of the pipe which is not the case in OCF.
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