ST501 Insertion Type Ultrasonic Flowmeter
Ultrasonic flow meters that use transit-time methods to measure
flow.
Introduction
ST501 Ultrasonic flow meter uses the most reliable digital signal
processing technology, transmitting flow measurement for a wide
range of liquid and pipe size with high accuracy and reliability.
Combined the outstanding performance transducer with higher
industrial level material, Flo-Instruments can have long time work
without any worries.
Clear menu display selections make use of instruments very
convenient. The IP68 transducer is more suitable for applying in
harsh environments such as humidity and immersion. Simple interface
makes it very convenient to operate.
The ST501 ultrasonic flowmeter is based on Transit-Time technology,
which has high measurement accuracy. Insertion transducer refers to
inserting the transducer into the inside of the pipeline for flow
measurement. It can accurately measure the flow rate and flow
velocity inside the liquid pipeline. The advantage of the insertion
transducer is that it can keep the outer surface of the pipe flat,
thereby reducing pressure loss, and has high reliability and
measurement accuracy.
Benefits
- Measures the actual flow and total consumption ofvarious liquids
- No loss of process control, optimization of assets and efficiency,
no downtime or expense from calibration
- Adaptive signal processing algorithms optimize performance,
ensuring accurate measurements even in challenging flow conditions.
- Clear display interface and LCD display with alarm function, easy
to operate and debug
- Utilize transit-time ultrasonic technology so as to realize
bidirectional flow measurement by precisely measuring the time it
takes for ultrasonic signals to travel upstream and downstream
- Leverage the data logging capabilities to analyze historical flow
patterns to make system optimization.
- Built-in keypad and simple menu system for fast and easy
programming of pipe diameter, pipe material, liquid type, and
measurement units.
Flo-Instruments ST501 ultrasonic flowmeter offers high-accurate and
repeatable flow measurement for liquids at an economical price. It
is made of strong metal case. Combined the outstanding performance
transducer with high industrial grade material, it's ideal for
pipes size from 1''(25mm) up to 48''(1200mm) in diameter. Insertion
transducer refers to inserting the transducer into the inside of
the pipeline for flow measurement. It can accurately measure the
flow rate and flow velocity inside the liquid pipeline. The
advantage of the insertion transducer is that it can keep the outer
surface of the pipe flat, thereby reducing pressure loss, and has
high reliability and measurement accuracy.
Principle
TVT(Transit-Time Vortex) technology represents a cutting-edge
approach to ultrasonic flow measurement, combining the principles
of transit-time ultrasonics with the capability to harness the
vortex shedding phenomenon, delivering unparalleled accuracy and
versatility in ultrasonic flow meters. This innovative integration
technology enhances the accuracy, versatility, and performance of
ultrasonic flow meters, making them well-suited for a wide range of
applications across various industries and is a valuable solution
for industries requiring precise flow measurements in varying flow
conditions.
- Enhanced Accuracy in Turbulent Flows:
TVT technology excels in applications where fluid flow conditions
vary between laminar and turbulent. The incorporation of vortex
shedding data enhances accuracy in challenging flow environments.
- Versatility in Fluid Types:
TVT technology is versatile and suitable for a wide range of fluid
types, including liquids with varying viscosities and densities.
Applications
Insertion type ultrasonic flowmeters are mainly used to measure
volume flow in conductive liquids and slurry in closed pipes.
Including acid, alkali, salt and other highly corrosive liquids.
Insertion type ultrasonic flowmeters are widely used in petroleum,
chemical, metallurgy, textile, food, pharmaceutical, paper-making
and other industries, as well as environmental protection,
municipal management, water conservancy construction and other
fields.
Specifications
| Performance specifications |
| Velocity range | 0.03 ~ ±16ft/s (0.01 ~ ±5m/s) |
| Accuracy | ±1.0% |
| Pipe size | 1’’~48’’ (25mm~1200mm) |
| Repeatability | 0.3% of measured value |
| Linerarity | ±1.0% |
| Fluid | Water, Sea water, Oil, Alcohol... |
| Pipe material | PVC, stainless steel, carbon steel, copper... |
| Function specifications |
| Communication & Outputs | Communication: ModBus RS485 |
| Analog output: 4~20mA, max load 750Ω. |
| Pulse output: 0~9999Hz, OCT, (min. and max. frequency is
adjustable) |
| Relay output: max 1Hz(1A@125V AC or 2A@30V DC) |
| Flow Unit | Cubic Meters(m³), Liters(l), USA Gallons(gal). The factory default
unit is m3/h. |
| Time Unit | /Day/Hour, /Min, /Sec. |
| Power supply | 24V DC/1A@ max |
| Keypad | 16(4×4) key with tactile action |
| Display | 20×2 lattice alphanumeric, back lit LCD. |
| Temperature | Transmitter: 32℉~140℉ (0℃~60℃) |
| Transducer: -40℉~176℉ (-40℃~80℃) |
| Humidity | Up to 99% RH, non-condensing |
| Physical specifications |
| Transmitter | Aluminum alloy, IP65. |
| Transducer | Encapsulated design, IP68. |
| Transducer cable | Standard cable length: 33ft (10m). |
| Weight | Transmitter: approximately 0.7kg; Transducer: approximately 0.4kg |
Product Dimension
| Transmitter |
 |
| Transducer |
 |
Product Display
Communication and Output Functions
The ST501 Fixed Ultrasonic Flow Meter is equipped with multiple
communication and output options to ensure seamless integration
into various industrial control systems. These outputs enable
real-time data acquisition, remote monitoring, and control of
flow-related processes.
Summary of Output Capabilities
| Output Type | Function | Application Examples |
| RS485(Modbus) | Digital communication | Remote monitoring, SCADA, system integration |
| 4-20mA | Analog output | PLC input, process feedback, DCS systems |
| OCT Pulse | Flow totalization output | Batch controllers, energy meters, flow loggers |
| Relay | Alarm/control output | Trigger alarmscontrol valves/pumps, flow safety protection |
Installation Methods & Wiring Diagram
