Integrated measuring systems
for the whole water cycle
Open Channel Flowmeter
®
MainFLO
Measures from 0,01 to
5 m/s
Bi-directionnal velocity
measurement
RS232 & Bluetooth
communication
Portable version
Up to 12 months battery
life
Flow measurement
possible in very shallow
water
Velocity measurement
with internal temperature
measurement and real
time speed of sound
correction
Application
The MainFLO Doppler flowmeter measures and records flows for open channels and part-filled pipes.
The MainFLO is used:
 Either in portable configuration, for survey and diagnostic work, for precise flow data in sewer networks,
 Or in fixed configuration, for regulatory works and overflow survey.
The MainFLO is used for the following applications:
 Sewers and waste water treatment plants,
 Irrigation canals and channels,
 Rivers and streams.
Main features
The MainFLO embeds a CPU, a level sensor and a velocity sensor:
 Level is measured by ultrasonic probe or using a piezo-resistive sensor,
 Velocity is measured by a Doppler-effect velocity sensor.
The MainFLO is the only flowmeter that measures actual mean velocity:
 Accurate measurement, irrespective of downstream effect,
 Constant performance in stable conditions or in transient conditions.
Suitable for infiltration water measurement, due to its signal quality at low velocities, down to 1 cm/s.
All our sensors are calibrated on our own calibration benches, with COFRAC interface.
Various installations
With hooping and spreader
Portable MainFLO® Unit
On rectangular channel
Doppler Velocity Probe *
(DVP)
With floating support
Stationary MainFLO® Unit
* The Doppler Velocity Probe (DVP) can be used independently. For further information, please contact us.
Measurement principle
Level: by pressure measurement
Using a piezo-resistive level probe.
Velocity: by Doppler system
Using a Doppler-effect velocity sensor.
An ultrasonic beam is emitted, along the pipe
interior, by an immersed probe. The ultrasonic signals
are reflected by the suspended particles in the water.
The reflected signals are then analysed to determine the
mean water velocity.
Technical specifications
Display
128 * 64 dot matrix display of real time data
Logged data
Micro SD card [4 GB] non-volatile flash memory (Based on a measurement
every 2 minutes, usage is 20kBytes per day)
Separate file for each day. Each record is:
Velocity, Level, Flow, Flow Quality, Temperature, Speed of Sound
Internal
Power Supply
Battery
7 Ah (optional 12 Ah) lead acid battery
Battery life
Typically 6 months for 7 Ah battery with a reading every 2 minutes
Actual autonomy will be reduced by excessive use of display and Bluetooth
External
Power Supply
Mains supply
For long term requirements and trickle charging of battery: 9 – 28 VDC
Memory
Data Logging
Real Time Clock
6 mA at 12 VDC on standby, 40 mA at 12 VDC for measurement plus any
battery charging required
2 * contact closure outputs can be used as alarms or dosing output
4 * 4-20mA outputs
Integral clock with backup power for 20 minutes if no main battery or external
power
Digital Connection
RS232 and integral Bluetooth
Consumption
Outputs
Portable
Settings
Area-velocity calculation for flow. If velocity measurement quality is poor or
velocity sensor not fitted then flow calculation is based on level and stage
characteristics
Delayed Start, Sampling Cycle Time, Alarms, Dosing, Units, Level Calibration,
Stage Calibration, Bluetooth Control, Display Control, Language
MainFLO® Unit
Software
MainFLO software
Operating temperature
-20 to +60 °C (-4°F to 140°F)
Enclosure
Rugged Copolymer Polypropylene carrying case
Dimensions
124mm (4.88 in) * 246mm (9.68 in) * 270mm (10.63 in)
Weight
5 kg
Immersion
IP67
Warranty
24 months
Flow Calculation
Display
128 * 64 dot matrix display of real time data
Data Logging
Logged data
Power Supply
9-28Vdc
Outputs
2 * contact closure outputs can be used as alarms or dosing output
4 * 4-20mA outputs
Digital Connection
RS232 and integral Bluetooth
Settings
Area-velocity calculation for flow. If velocity measurement quality is poor or
velocity sensor not fitted then flow calculation is based on level and stage
characteristics
Delayed Start, Sampling Cycle Time, Alarms, Dosing, Units, Level Calibration,
Stage Calibration, Bluetooth Control, Display Control, Language
Software
MainFLO software
Operating temperature
-20 to +60°C
Enclosure
Aluminum
Dimensions
82mm (3.23 in) high * 150mm (5.91 in) wide * 222mm (8.74 in) long
Weight
2,5kg
Immersion
IP67
Warranty
24 months
Flow Calculation
Stationary
MainFLO® Unit
Micro SD card [4 GB] non-volatile flash memory (Based on a measurement
every 2 minutes, usage is 20kBytes per day)
Separate file for each day. Each record is:
Velocity, Level, Flow, Flow Quality, Temperature, Speed of Sound
Velocity
Measuring principle
DSP Doppler using twin 1 MHz transducers
Range
Bi-directional 0.01 to 5 m/s (0.03 to 16.4 ft/s)
Accuracy
± 2 % of reading if V ≥0.5m/s
± 0.01 m/s (± 0.03 ft/s) if V<0.5m/s
Resolution
1 mm/s (0.003ft/s)
15 mm (0.59 in) to 20mm (0.79in) above base of sensor, provided transducers
Minimum fluid level fully wetted
Temperature
Doppler Velocity
Probe (DVP)
Units
m/s or ft/s
Range
-10 ºC to +85 ºC (14°F to 185°F)
Accuracy
± 0.5 ºC (± 0.9°F)
Resolution
0.5 ºC (0.9°F)
Speed of Sound Correction
Fixed or Variable
Operating temperature
-20 to +60 °C (-4°F to 140°F)
Enclosure
Polyurethane, PVDF, 316 Stainless steel
Dimensions
19 mm (0.75 in) high * 46 mm (1.81 in) wide * 122 mm (4.80 in) long
Weight
<1,1 kg for 10 meters (32,8 ft) cable
Immersion
IP68 / NEMA6
Certification
ATEX and IECEx
Warranty
24 months
Range
Typically mounted on DVP mounting plate, but can be located separately to
suit installation.
0-150mBar or 0-350mBar
Other range in option – ATEX version in option
Accuracy
0,1% FS
Measuring principle
Piezo-resistive
sensor
Option
Level
Ultrasonic sensor
Available on stationary version
Products available for sales and rental. Please contact us for more information.
Head office:
34, route de Saint Romain
69450 Saint Cyr au Mont d’Or
France
Limonest site:
1, chemin des Vergers – Bât 2A
69760 Limonest
France
Tél. +33 (0)4 72 53 11 53 - Fax +33 (0)4 78 83 44 37 - E-mail : [email protected]
MainFLO – V.2 – EN - 09/15 – Hydreka reserves the right to modify product technical characteristics without notice – Non-contractual pictures
Memory