A flow meter is a device used to measure the flow rate or quantity of a gas or liquid moving through a pipe. Both gas and liquid flow can be measured in volumetric or mass flow rates, such as liters per second or kilograms per second, respectively. These measurements are related to the material’s density. The density of a liquid is almost independent of conditions. This is not the case for gases, the densities of which depend greatly upon pressure, temperature and to a lesser extent, composition.

There are no “universal” flow meters which are suitable for all applications. The basis of good flow meter selection is a clear understanding of the requirements of the particular application. Therefore, time should be invested in fully evaluating the nature of the process fluid and of the overall installation.

Ultrasonic flow meters are commonly applied to measure the velocity of liquids that allow ultrasonic waves to pass, such as water, molten sulfur, cryogenic liquids, and chemicals. Transit time designs are also available to measure gas and vapor flow. Be careful because fluids that do not pass ultrasonic energy, such as many types of slurry, limit the penetration of ultrasonic waves into the fluid. Transit time ultrasonic flow meters fail to operate when an opaque fluid weakens the ultrasonic wave to such an extent that the wave does not reach the receiver.

The Ultrasonic Transit-time Flow meters work on the principle of measuring the time of flight difference between an ultrasonic pulse sent in the flow direction and an ultrasound pulse sent opposite the flow direction. This time difference is a measure for the average velocity of the fluid along the path of the ultrasound beam. By using the absolute transit time and the distance between the ultrasound transducers, the current speed of flow can be easily found. The Transit-Time based Flow meters are tolerant of liquids with a small amount of air bubbles or suspended solids.

 

Hand Held Ultrasonic Flow Meters Flow Meter The model SL1168P portable handheld ultrasonic flowmeter (here-in-after referred to as SL1168P) is a true state-of-the-art transit-time flowmeter.read more…

 

SL1168 Ultrasonic Flowmeter uses the latest digital technology and low-voltage broadband pulse transmission. The instrument is tolerant of liquids with small amounts of air bubbles or suspended..read more…

 

Ultrasonic flow meter Portable Flow Meter Clamp on flow meter Description Model SL1188P is a Portable Ultrasonic flow Meter. It collects Flow Data via a TPC (Tablet PC), and uses “UFM”…read more

 

SL1188 Industrial Non-Invasive Ultrasonic Transit-Time Flow Meter GENERAL DESCRIPTION The SL1188 Ultrasonic clamp-on flow meters is a state-of-the-art universal transit-time flowmeter….read more….

 

In-Line Ultrasonic Flow Meter High Dynamic Response Inline Ultrasonic Flow meter MODEL: SL3488 SL3488 Ultrasonic flow meters The model SL3488 inline ultrasonic flow meter  ….read more..===>

 

batterry power ultrasonic flow meter SL1438B Battery Powered Ultrasonic Flow Meter Installation method: In-line type Flow Range: 0.03ft/s ~ +-23ft/s (+-0.01m/s ~ +-7m/s) Accuracy: ±…read more..====>

 

SL1438K Clip On PVC Ultrasonic Flowmeters
SL1438K Clip On PVC Ultrasonic Flowmeters The 1438K Has integral sensors and clips over PVC pipes Flow range: 0.01 ~ ± 5m/s Accuracy: ± 1.5% FS Repeatability: 0.3% Pipe size: DN20 ~ DN63 Fluid:…Lainnya>>
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