The measuring principle of portable ultrasonic flowmeter is based on ultrasound transmission through a liquid. Transit time measuring technique utilizes two transducers, which function as both ultrasonic transmitters and receivers. The ultrasound waves traveling in the direction of the flow of the liquid require less time than when traveling in the opposite direction. The subsequent time difference is directly proportional to the flow velocity in the pipe. Having measured the flow velocity and knowing the pipe cross-sectional area, the volumetric flow can be easily calculated.
- Non-invasive type measurement, no interruption to process and no risk of contamination. It takes
just a few minutes to install and there is no need to shut down flow or drain the system
- With capabilities of measuring bi-directional flow and pipe diameter range from 13mm to 2000mm
- Datalogging function, 98000 data points logged events distributed across up to 20 sites.
- RS232/USB output facility that can be used to download logged data to a PC or printer.
- 4-20mA/Pulse output, USB, RS232 cables are provided as standard with the flow meter.
• Building Energy Management
• Semi Conductor Industry
• Food and beverage
||Two transducer for different pipe diameter
‘ A’ transducers - 13mm - 115mm - Optional
‘ B’ transducers – 50mm – 2000mm - Standard
||• Pipe ID >75mm - ±0.5% to ±2% of flow reading
for flow rate >0.2m/s
• Pipe ID in range 13mm - 75mm - ±3% of flow reading
for flow rate >0.2m/s
and ±6% of flow reading for flow rate < 0.2m/s
• Flow velocity corrected for
Reynolds number over entire velocity range
||±0.5% of measured value or ±0.02m/s
whichever is the greater
|Selectable Flow Units
||litres, gal, USgals, Barrel, m³
Total volume – 12 Digits - forward and reverse
||0.1 to 20m/sec (bi directional)
|Transducer Temperature Range
||-20°C to +135°C
|Pipe Material Constructed of Any Sonic Conducting Medium Such As:
|Permitted Pipe Linings Include:
|Enclosure Protection Class
||Flame retardant injection moulded ABS
||264mm x 168mm x 50mm
||1.1 kg (including battery)
|Number of keys
||240 x 64 pixel graphic display, high contrast black-on-white, with backlight
||-20°C to +50°C
||-25°C to +65°C
||90% RH MAX at +50°C
|Output Analogue Output
||4–20mA, 0–20mA, 0–16mA
||0.1% of full scale
||Adjustable between 0–26mA
||One open collector opto-isolated digital output
||Up to 500 pulses/sec (depending on pulse width)
||500ms for 1pulse/s5ms for 100 pulses/s
||Two opto-isolated relay
||Time-stamped flow rate. Units may be changed at time of
download by selecting the corresponding unit on the keypad (e.g l, gals, USgals, m³).
|Number of Data Points
||98,000 (98k) logged events distributed across up to 20
sites. All free memory is allocated by demand.
|Programmable Logging Interval
||5s to 1hr. The screen updates to show the end
time of memory remaining as sample units are selected.
||Logging can be started and stopped manually or set for
automatic (timer) operation.
||User selectable to either overwrite old data or stop logging.
||Logged data can be downloaded to PC using RS232/USB
interface. Data can be downloaded directly to facilitate ‘live’ logging, or recalled
from memory to download at any time.
||TUF339 has a single RS232/USB output facility that can be used to download logged data to a PC or printer.
2m interface cables are supplied with the equipment.
RS232 cable is terminated with a standard 9-pin D-type connector suitable for connecting to the serial port of a PC/printer. USB cable is terminated with a standard USB connector. In each case these cables connect to an 8 pin LEMO connector on the top of the TUF339
|Input Voltage Range
||Manufacturer: Model ECO-181WP12
Input voltage range: 90–264Vac
||Technology: 5-cell NiMH
Operating time: Typically 20 hours continuous with backlight and 4-20mA output
OFF Recharge time: 6.5 Hours
Service life: >500 charge/discharge cycles
|Note: Specifications are subject to change without notice.
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