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| News Release |
Woburn, MA April 1, 2008 - Shenitech has rolled out the third generation of its clamp-on wall-mount ultrasonic flowmeter, Stuf-300F1B. This non-intrusive high-performance flowmeter is able to offer accuracy as high as 1% over a wide flow range at a low cost.
more News click here»
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STUF-300F1C: Insertion Ultrasonic Transit-Time Flowmeter
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 Features :
- Excellent long-term stability and reliability
- No moving parts. No maintenance
- Non obstructive. No flow disturbance. No pressure drop
- Bi-directional. Wide flow range -52ft/s ~ +52ft/s (-16m/s ~ +16m/s )
- Suitable for all commonly used pipe materials
- High accuracy (better than ±1%, and can reach to ±0.5% with calibration)
- High quality signal. Robust performance
- Hot-tapping transducer installation. No need to shut down the pipe flow. Easy to install and to remove
- Optional GPRS/GSM networking capability with certain model
- For pipe size 3" (DN80mm) or larger
- Suitable for pure liquids and liquids with minor particles. No dependency on conductivity
- Built-in flow totalizers for positive, negative and net flows
- Isolated RS-485 interface. Optional GPRS/GSM module. Supports MODBUS
- 4-20mA output, relay output, pulse output, alarm output, batch control, etc.
- Optional RTD temperature interface and thermal energy measurement functionality
- Easy to use and set up. Self-explanatory menu-driven programming
- NEMA 4X (IP65) weather-resistant enclosure
- Low-power consumption, less than 1.2 Watt
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Description :
The STUF-300F1C wetted flowmeter provides abundant capabilities for accurate liquid flow measurement. The utilization of proprietary ultrasonic signal processing technologies as well as ultrasound transmission/receiving technologies allows our product to measure pipe flow rate reliably and accurately.
Compared with a clamp-on flowmeter, the biggest advantages of this insertion-type flowmeter are its long-term stability, better signal quality and no installation uncertainty. The last two features can also be translated into higher accuracy. After the transducer is installed, no maintenance is needed. This feature can save a lot of money for those applications where many flowmeters are installed.
The STUF-300F1C flowmeter is carefully designed so that its user-interfaces are self-explanatory and the instrument is very easy to operate. Our unique hot-tapping installation fixture makes the installation simple and flexible, and there is no need to shut down the flow during the installation. Because the transducer is not welded to the pipe, but screwed in a water-sealed fixture, it can be easily taken off and put back whenever needed. Furthermore, the transducer head is usually in flash with the pipe inner surface, hence no intrusion to the flow. There is no pressure drop and no moving parts.
The STUF-300F1C product is designed for pipes larger than 3” (DN80mm). For smaller pipes, our spool-piece model, STUF-300F1G, might be a better choice.
The STUF-300F1C is ideal for flow monitoring and closed-pipe applications, such as normal water flow measurement (hot/chill water, city water, sea water), sewage and sludge measurement, and measurement of oil (crude/diesel/fuel), chemicals (alcohol, acids, etc.), and beverages.
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Specifications :
Main Unit |
Repeatability |
Better than ±0.5% |
Accuracy |
Normally ±1%. Can reach ±0.5% when
in-situ calibration is available |
Response Time |
0.5s. 0~99s programmable |
Velocity |
-52ft/s ~ +52ft/s, bi-directional |
Display |
LCD with
backlight. 2 x 20 characters.
Displays
flow rate, total flow (positive,
negative and net rates), velocity, time, analog inputs, etc. |
Units |
English (U.S.) or
metric |
Signal Outputs |
Current output: 4-20mA or 0-20mA. Impedance 0-1k.
Accuracy 0.1% |
Isolated OCT output: can be programmed as pulse output for flow totalizers or frequency output for flow rate |
Relay: can be programmed to control alarm, valve or batch process |
Sound alarm |
Signal Inputs |
One channel 4-20mA current
input: for signals such as temperature, pressure, liquid level,
etc. Accuracy 0.1%.
Additional analog input channels are
available upon request.
Two RTD temperature channels (refer to model STUF-300R1B): to
accommodate two PT100 temperature sensors. Thermal energy
measurement and calculation functionalities implemented. |
Recording |
Automatically records the following information:
· The
totalizer data of the last 64 days / 64 months / 64 years;
· The
power time and corresponding flow rate of the last 64 power on and off events. Allows
for manual or automatic flow loss
compensation
· The
instrument working status of the last 64 days |
Communication
Interface |
Isolated
RS-485. Supports the MODBUS protocol.
Optional GPRS / GSM module for networking, remote monitoring and
remote control (for model STUF-300FNB only) |
Enclosure |
Protection Class: IP65 (NEMA 4X)
Explosive Proof Class: ExdIIBT4 (for model STUF-300F2C only) |
Liquids |
Liquid Types |
Virtually all
commonly used liquids (full pipe), such as chilled water, hot
water, etc. |
Liquid Temp |
32˚F
~ 302˚F (0˚C ~ 150˚C) |
Suspension
concentration |
<20,000ppm. Particle or air bubble
size should not exceed 75um |
Pipe |
Pipe Size |
3" ~ 240"
(DN80mm ~ 6,000mm) For
smaller pipes, we recommend our spool-piece model, STUF-300F1G |
Pipe Material |
All metals, most
plastics, fiber glass, etc. Allows pipe liner. |
Pipe Straight
Section Length |
15D or longer prefered, where D
is pipe diameter. If a pump or valve is near upstream, the straight pipe section
should be > 30D. |
Cable |
Shielded
transducer cable. Standard length 15’ (5m). Can be extended to
1640’ (500m). Contact the manufacturer for longer cable
requirement.
Cable should not
be laid in parallel with high-voltage power lines. Neither
should it be close to strong interference sources such as power
transformers. |
Environment |
Temperature |
Main unit: 0˚F
~ 176˚F (-30˚C ~ 80˚C) |
Transducer: -40˚F
~ 302˚F (-40˚C ~ 150˚C) |
Humidity |
Main unit: 85% RH |
Transducer:
water-immersible, water depth less than 10’ (3m) |
Power |
AC: 90V ~ 260V, or, DC: 18VDC ~ 36VDC
<1 Watt |
Weight |
STUF-300F1C: 5lb
(2.5kg)
STUF-300F2C: 14lb
(7kg)
STUF-300FNC: 5lb (2.5kg) |
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Transducer Options:
(for pipe size > 3” or DN80mm)
(For smaller pipes, we recommend our spool-piece model, STUF-300F1G ) |
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Please click here to get a quote or contact us for more information
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