This model was discontinued out of Japan.
The model US300FM is an ultrasonic flowmeter for measuring liquid flow in a fully filled pipe. With the advanced signal processing and correlation detection method, US300FM provides fast, accurate, and no-zero offset flow measurements in clean to dirty fluids.
Comes with transducers in three sizes that accommodate pipe sizes from 25mm to 6500mm
Details
Yokogawa's transit-time ultrasonic flowmeter, with our advanced technologies, provides fast and accurate measurements in clean to dirty liquids, requiring no zero flow adjustment.
US300 Series
The measuring principle of transit-time ultrasonic flowmeters is based on the influence of the flowing fluid on the traveling time of the ultrasonic signal. The signals are transmitted through the pipe and the transit time difference between the forward and backward signals is used to determine the flow velocity.
The transducers are clamped on the outer pipe wall without touching the liquid. Thus, there is no risk of contamination and it is suitable for ultra clean liquids. There is also no risk of corrosion, which is suitable for aggressive liquids as well.
Yokogawa's transit-time ultrasonic flowmeter, with our advanced technologies, provides fast and accurate measurements in clean to dirty liquids, requiring no zero flow adjustment.
| - | Easy installation |
| The transducers are individually calibrated when shipped, and are easy to install on-site. The calibrated data is stored in the Sensor ROM. For portable type meters the Sensor ROM is built-in. For fixed type meters it is set in the main units. The combination of the transducers with the Sensor ROM requires no adjustment of the zero flow condition. | |
| - | Improved measurement ability under difficult conditions |
| With our noise suppression technique combined with correlation detection methods, measurement capability against air bubbles in the fluid has been improved. | |
| - | Fast response |
| With our original signal processing, fast and accurate measurement has been realized, even using correlation methods which previously required extended calculation time. |
 |
The transit-time ultrasonic flowmeter utilizes the propagation time of the ultrasonic signal in the fluid.
A pair of transducers are installed on the outer surface of the pipe as shown in the diagram. Each transducer works alternatively as both transmitter and receiver of ultrasonic signals.
When the ultrasonic signal is transmitted toward the upstream side against the flow direction, more propagation time is required (T1). On the other hand, when it is transmitted toward the downstream side with the flow direction, the propagation time is less (T2). That is, the signal is delayed or speeded up by the moving fluid. The difference in time between "T1" and "T2" is proportional to the flow velocity, and the flow volume can be calculated by multiplying it by the cross-sectional area, which is obtained by using the pipe diameter and wall thickness.
- More accurate measurements under difficult conditions
- New noise suppression technique improves accuracy of measurements with fluids where air bubbles are present
- Fast response
- Yokogawa signal processing technology improves the speed and accuracy of measurements
- Easy installation and adjustment of transducers
- Transducers are small and light – can be held in one hand
- Each sensor calibrated before shipment, eliminating need to tune on-site
- No longer necessary to adjust the zero flow condition
- Easy setup with interactive parameter setting process
- Two flow-input channels are provided as an option
- A maximum of two current outputs enable the simultaneous measurement of flow and sound velocity
US300FM Performance
|
Fluid |
Liquid with turbidity < 10,000 mg/litter, fluid sound velocity 800 to 3,500 m/s) |
|
Measured values |
Volume flow, mass flow (by setting density), flow velocity, sound speed in fluid (when optional wall thickness probe is provided) |
|
Pipe size |
25 to 6,500 mm |
|
Pipe material |
Carbon steel, stainless steel, gray cast iron, ductile iron, copper, glass, PVC, etc. |
|
Flow velocity range |
0.01 to 25 m/s |
|
Fluid temperature range |
-30 deg to +130 deg C. (general use) |
|
Accuracy |
1% to 3% of reading (depends on application) |
|
Straight pipe run upstream |
More than 10 D (depends on the piping conditions) |
Main unit construction
|
Housing material |
Aluminum (powder coated) |
|
Water/dust proof |
IP65 |
|
Dimensions (HxWxD) |
200 mm x 280 mm x 71 mm |
|
Weight |
Approx. 2.8 kg |
Transducer construction
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Case material |
Stainless steel SUS316 Ti |
|
Water/dust proof |
IP65 (General purpose), IP67 (Immersible) |
Functions
|
Calculation of the two flow inputs |
Two values from an average (for two path measurement), sum, or difference for channel A and channel B inputs |
|
Time-programmable measurement |
Automatic start and stop of measurement using internal clock. Can be used with data logging or communication function. |
|
Parameter setting storage |
Storage of pipe and fluid parameters (Maximum of 80 different settings) |
|
Sound velocity measurement |
Measurement of the sound velocity in the liquid |
Pure water measurement for semiconductor industry
- Hot water measurement for food industry CIP
- Cooling water measurement (including water containing iron powder) for iron and steel industry
- Flow monitoring for water supply and sewerage lines
Downloads
Brochures
- Ultrasonic Flowmeter (199 KB)
Instruction Manuals
- US300FM Ultrasonic Flowmeter (1.2 MB)
- Manual Change 15-022-E (789 KB)
General Specifications
- US300FM Ultrasonic Flowmeter (217 KB)
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