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.
• Building Energy Management
• Semi Conductor Industry
• Food and beverage
|Measuring Range||Two transducer for different pipe diameter
‘ A’ transducers - 13mm - 115mm - Optional
‘ B’ transducers – 50mm – 2000mm - Standard
|Flow Accuracy||• 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
|Repeatability||±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
|Flow Range||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:||Carbon Steel
|Permitted Pipe Linings Include:||Rubber
|Enclosure Protection Class||IP67|
|Material||Flame retardant injection moulded ABS|
|Dimensions||264mm x 168mm x 50mm|
|Weight||1.1 kg (including battery)|
|Number of keys||16|
|Display||240 x 64 pixel graphic display, high contrast black-on-white, with backlight|
|Operating Temperature||-20°C to +50°C|
|Storage Temperature||-25°C to +65°C|
|Operating Humidity||90% RH MAX at +50°C|
|Output Analogue Output|
|Range||4–20mA, 0–20mA, 0–16mA|
|Resolution||0.1% of full scale|
|Error Current||Adjustable between 0–26mA|
|Maximum Load||620 Ohms|
|Output Type||One open collector opto-isolated digital output|
|Pulse Repetition||Up to 500 pulses/sec (depending on pulse width)|
|Pulse Wwidth||500ms for 1pulse/s5ms for 100 pulses/s|
|Output Type||Two opto-isolated relay|
|Logged Data||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.
|Manual/Auto Control||Logging can be started and stopped manually or set for
automatic (timer) operation.
|Memory Overflow||User selectable to either overwrite old data or stop logging.|
|Download Log||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.
|RS232/USB Interface||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||9–24Vdc|
|Battery Charger||Manufacturer: Model ECO-181WP12
Input voltage range: 90–264Vac
|Battery Pack||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.|
For all inquiries, you may contact us through Telephone, Email or Live Chat Support.
Monday to Friday: 8.00am to 5.30pm
Technical Support (After Office Hours)
Tel: (65) 9876 6258
|By Phone / Fax||By Email|
|Tel: (65) 6553 0366
Fax: (65) 6553 0828