Flowatch®
This particularly competitively priced instrument has been developed for use in difficult conditions. Thanks to its various helixes, it offers measurement solutions for virtually any application, whether measuring gas or liquid flows. An intrinsically safe probe is also available for natural gas measurements.
Fields of application
Natural gas
River current measurement
Irrigation channels
Waste water drainage
Tidal flow
Hydrological studies
Ventilation ducts
Air conditioning
Chimney flues
Flowatch® - Technical data
Speed measurement - Standard size propeller
| Measurement units | km/h, m/s, cm/s, mph, fps, knots and Beaufort |
| Resolution | 0.1 for all units (except cm/s: 3 cm/s) |
| Maximum speed | 150 km/h (except cm/s: 999 cm/s) |
| Diameter (gas) | Ø 20mm |
| Through hole | Ø 33mm |
| Measurement range | from 1 to 30 m/s |
| Minimum sensitivity | < 3 km/h - < 1 m/s |
| Precision | ± 2% FS |
| Off-axis error | ± 30° / ± 3% FS |
| Operating temperature | -50°C to +100°C |
Speed measurement - Small propeller
| Measurement units | km/h, m/s, cm/s, mph, fps, knots and Beaufort |
| Resolution | 0.1 for all units (except cm/s: 3 cm/s) |
| Maximum speed | 150 km/h (except cm/s: 999 cm/s) |
| Diameter (gas) | Ø 12mm |
| Through hole | Ø 18mm |
| Measurement range | from 1 to 30 m/s |
| Minimum sensitivity | < 3 km/h - < 1 m/s |
| Precision | ± 2% FS |
| Off-axis error | ± 10° / ± 3% FS |
| Operating temperature | -50°C to +100°C |
Speed measurement - Water propeller
| Measurement units | km/h, m/s, cm/s, mph, fps, knots and Beaufort |
| Resolution | 0.1 for all units (except cm/s: 3 cm/s) |
| Maximum speed | 150 km/h (except cm/s: 999 cm/s) |
| Diameter (gas) | Ø 60mm |
| Measurement range | from 0.1 to 10 m/s |
| Minimum sensitivity | < 0.3 km/h - < 0.1 m/s |
| Precision | ± 2% FS |
| Off-axis error | ± 20° / ± 3% FS |
Temperature measurement
| Measurement units | °C, °F, °C felt and °F felt |
| Thermometer accuracy | ± 0.2°C |
| Resolution | ± 0.1°C |
| Functions | measurement of ambient, perceived, minimum, average and maximum temperature |
Storage and transport case (kit 1)
Storage and transport bag (kit 2)
Telescopic aluminium probe with 1.2 metre cable. Temperature sensor at end of probe. Total probe length: 1.2 metres (included in kit).
Compact probe for using the Flowatch as a hand-held anemometer
Ø 20 mm gas propeller, Ø 33 mm through-hole (included in kit)
Ø 12 mm gas propeller, Ø 18 mm through-hole
Ø 60 mm water propeller (included in kit)
Probe with weighted propeller at the end of a 15-metre cable for measuring the speed of river or marine currents
Easyflow
Extremely compact and lightweight, the EasyFlow is the ideal instrument for measuring the flow of torrents or wild watercourses. It is designed for professionals who occasionally take measurements and don't need to record several sites. It takes just a few minutes to measure a flow using the tracer dilution method.
EasyFlow is a highly ergonomic, waterproof instrument with a conductivity probe and 10 m cable. It comes in a nylon shoulder bag with 3 calibration doses, EasyViewer software, a memory aid and a USB communication cable. So it's easy to carry around.
The EasyViewer software enables data to be transferred to a PC, the gauging curve to be viewed and, if necessary, the flow rate calculation to be corrected. It is very useful, even necessary, to check the quality of the gauging by viewing the curve.
Main software functions:
- Loading measurement data from EasyFlow
- Display of the gauging curve and possibility of graphically correcting the flow calculation
- Addition of information on gauging, such as water level height
- Software in three languages: German, English or French
EasyFlow - Technical data
Salinity
| Measurement range | 0 - 3200 mg/l |
| Sensitivity | 1 mg/l |
| Precision | < 3% |
| Salt quantity (min - max) | 1g - 100 kg |
Temperature
| Measurement range | 0 - 40 °C |
| Absolute accuracy | ± 0,2 °C |
Flow
| Precision (optimum mix): | < 5 % |
| Display unit capacity: | 0.1 l/s - 99,900 l/s |
Divers
| Alimentation | 3 piles alcalines 1,5 V type AA, AM3, LR6 |
| Autonomie | ~ 100 heures en service normal |
Le principe de la méthode par dilution (ou par intégration) de traceur consiste à injecter un certain volume de traceur dans l’écoulement. En aval, à une distance suffisante pour que le mélange soit bon, on mesure la concentration de ce traceur dans le cours d’eau. Le débit est alors obtenu par intégration de la concentration au cours du temps.
Grâce à cette méthode, la mesure de débit d’un cours d’eau peut être effectuée par une seule personne et en moins d’une heure, alors qu’une mesure identique au moulinet sera largement plus fastidieuse et nécessitera facilement 2 à 3 heures.
Notre appareil EasyFlow utilise cette méthode par dilution avec du sel de cuisine comme traceur. Ils sont équipés d’une sonde qui mesure la conductivité de l’eau, qui est linéairement proportionnelle à la concentration en sel dissous dans l’eau.
Le sel de cuisine a l’avantage de posséder un haut degré de dilution dans l’eau, d’être non polluant et d’être très peu absorbé par la végétation et les matériaux du lit du cours d’eau. De plus, son faible coût et sa facilité d’approvisionnement en font un traceur idéal.