Flowatch®
At a particularly competitive price, this device has been developed for use even in difficult conditions. Its various propellers offer measurement solutions in almost all cases, whether for measuring gas or liquid flows. An intrinsically-safe probe is also available for natural-gas measurements.
Fields of application
Gas pipelines
River current measurement
Irrigation channels
Wastewater flows
Tidal flow
Hydrological studies
Ventilation ducts
Air conditioning and ventilation
Chimney ducts
Flowatch® – Technical data
Speed measurement – Standard size propeller
| Units of measurement | 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 |
| Range of measurement | 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 size propeller
| Units of measurement | km/h, m/s, cm/s, mph, fps, knots et 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 |
| Range of measurement | 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
| Units of measurement | 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 |
| Range of measurement | 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
| Units of measurement | °C, °F, perceived °C and perceived °F |
| Thermometer accuracy | ± 0.2°C |
| Resolution | ± 0.1°C |
| Functions | measuring air, perceived, minimum, average and maximum temperature |
Storage and travel case (kit 1)
Storage and travel bag (kit 2)
Telescopic aluminium probe, with 1.2-metre cable.
Compact probe to use Flowatch as a handheld anemometer
Gas propeller Ø 20 mm, through hole Ø 33 mm (included in the kit)
Gas propeller Ø 12 mm, through hole Ø 18 mm
Probe with weighted propeller at the end of a 15-metre cable
Easyflow
The EasyFlow gauge is compact and light, and is ideal for measuring flow in torrents of water or wildly flowing streams. It is designed for professionals. A flow can be gauged using the tracer dilution method in a few minutes.
The EasyFlow gauge is very ergonomic and perfectly waterproof, and is supplied with a conductivity probe with 10 metres cable. It is delivred in a shoulder bag and with 3 calibration doses, EasyViewer software, a quick manual and USB communication cable.
The software EasyViewer, delivered with the device, allows the download of the data on the PC, the visualization of the gauging curve and the eventual correction of the flow calculation. Very usefull to verify the quality of the gauging by viewing the curve.
Main functions:
- Download measured data from EasyFlow
- Visualization of the gauging curve and possibility to correct graphically the flow calculation
- Addition of information about the gauging, such as the limnimetric height
- Software in 3 languages: french, german and english
EasyFlow – Technical specifications
Salinity
| Measuring range | 0 – 3200 mg/l |
| Sensitivity | 1 mg/l |
| Precision | < 3% |
| Salt quantity (min – max) | 1g – 100 kg |
Temperature
| Measuring range | 0 – 40 °C |
| Precision | ± 0,2 °C |
Flow
| Precision (Optimum mix) | < 5 % |
| Measuring display range | 0,1 l/s – 99’900 l/s |
Various
| Supply | 3 alkaline batteries 1,5 V type AA, AM3, LR6 |
| Autonomy | ~ 100 hours under normal conditions |
The principle of the tracer dilution method consists to inject a quantity of tracer in the stream. Downstream, at a sufficient distance to obtain a good mix, we measure the concentration of this tracer in the water. The flow value is calculated by integration of this concentration in function of time.
With this method, the flow measurement of a stream can be done by only one person and needs less than one hour, contrary to measurements by current meters which are dull and require at least 2 or 3 hours.
Our flow measurement instrument EasyFlow uses this tracer dilution method with cooking salt as tracer. They are equipped with a probe which measures the water conductivity. The water conductivity is linearly proportional to the concentration of salt dissolved in water.
Cooking salt has the advantage to have a high degree of dilution in water, nonpolluting and very few absorbed by vegetation and materials present in the stream bed. It is an ideal tracer because it is low cost and easy to supply.