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Home > products > Data Center > ST502 Clamp-on Ultrasonic Flowmeter with 24V DC Power Supply for DN25-DN5000 Pipe Size and 0.15% Repeatability

ST502 Clamp-on Ultrasonic Flowmeter with 24V DC Power Supply for DN25-DN5000 Pipe Size and 0.15% Repeatability

Product Details

Place of Origin: Shenzhen

Brand Name: Flo-Instru

Certification: CE; ISO9001

Model Number: ST502

Payment & Shipping Terms

Minimum Order Quantity: 1

Packaging Details: Conventional Packaging

Delivery Time: 3-5 working days

Payment Terms: T/T

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Highlight:

24V DC Power Supply Ultrasonic Flowmeter

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DN25-DN5000 Pipe Size Clamp-on Flowmeter

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0.15% Repeatability ST502 Flowmeter

Output:
4-20mA, OCT Pulse Output, Relay Output, RS-232 / RS-485, RTD Temp. Input
Pipe Size:
DN25-DN5000
Transducers Temperature:
-40℉ ~ +140℉ (-40℃~+60℃)
Power Supply:
24V DC
Repeatability:
0.15%
Velocity Range:
0.03 ~±40ft/s (0.01~±12m/s)
Output:
4-20mA, OCT Pulse Output, Relay Output, RS-232 / RS-485, RTD Temp. Input
Pipe Size:
DN25-DN5000
Transducers Temperature:
-40℉ ~ +140℉ (-40℃~+60℃)
Power Supply:
24V DC
Repeatability:
0.15%
Velocity Range:
0.03 ~±40ft/s (0.01~±12m/s)
ST502 Clamp-on Ultrasonic Flowmeter with 24V DC Power Supply for DN25-DN5000 Pipe Size and 0.15% Repeatability
ST502 Clamp-On Flow Meter for Oil
Product Overview

ST502 Ultrasonic Flowmeter utilizes transit-time methods to measure liquid flow in industrial systems, delivering high-accuracy flow data through clamp-on transducers that never contact the fluid.

Key Features
  • Measures actual flow and total consumption of various liquids
  • CNC machined process with magnetic open cover technology
  • Adaptive signal processing algorithms for challenging flow conditions
  • Clear LCD display with alarm function and easy operation
  • Bidirectional flow measurement using transit-time ultrasonic technology
  • Built-in 2G SD card for historical flow data analysis
  • Simple menu system for fast configuration
Measurement Principle - TVT Technology

TVT (Transit-Time Vortex) technology combines transit-time ultrasonics with vortex shedding phenomenon, delivering unparalleled accuracy and versatility in ultrasonic flow measurement.

TVT technology diagram showing ultrasonic flow measurement principle

The device uses ultrasonic transducers installed on the pipe exterior. One transducer sends pulses downstream with flow, while the other sends upstream against flow. The time difference between signals is proportional to flow velocity.

Performance Specifications
Parameter Specification
Velocity Range 0.03 ~ ±40ft/s (0.01 ~ ±12m/s)
Accuracy ±0.5%
Pipe Size 1"~200" (25mm~5000mm)
Repeatability 0.15% of measured value
Linearity ±1.0%
Fluid Compatibility Water, Sea water, Oil, Alcohol...
Pipe Material PVC, stainless steel, carbon steel, copper...
Function Specifications
Feature Specification
Communication ModBus RS485
Analog Output 4~20mA, max load 750Ω
Pulse Output 0~9999Hz, OCT
Relay Output max 1Hz (1A@125V AC or 2A@30V DC)
Power Supply 24V DC/1A max
Temperature Range -40°F~140°F (-40°C~60°C)
Humidity Up to 99% RH, non-condensing
Product Dimensions

Transmitter

ST502 transmitter dimensions diagram

Normal Transducer

Normal temperature transducer dimensions

High-temperature Transducer

High-temperature transducer dimensions

Ultra High-temperature Transducer

Ultra high-temperature transducer dimensions
Product Display
ST502 product display showing LCD interface and controls
Communication & Output Functions

The ST502 offers multiple communication and output options for seamless integration into industrial control systems, enabling real-time data acquisition and remote monitoring.

Communication and output functions diagram Output capabilities illustration
Output Capabilities Summary
Output Type Function Application Examples
RS485 (Modbus) Digital communication Remote monitoring, SCADA, system integration
4-20mA Analog input/output PLC input, process feedback, DCS systems
OCT Pulse Flow totalization output Batch controllers, energy meters, flow loggers
Relay Alarm/control output Trigger alarms, control valves/pumps, flow safety protection
Wiring Diagram
ST502 wiring diagram for proper installation
Installation Methods
V Method
Standard method providing accurate readings for pipe diameters 25mm to 400mm (1"~16"). Requires proper transducer installation at pipe centerline with equal spacing.
V method installation diagram
Z Method
Utilizes directly transmitted signals with less attenuation. Suitable for pipe diameters 100mm to 3000mm (4"~120").
Z method installation diagram
N Method
Sound waves traverse fluid twice and bounce three times off pipe walls. Suitable for small pipe diameters, improving accuracy by extending transit distance.
N method installation diagram
W Method
Sound waves traverse fluid four times and bounce four times off pipe walls. Suitable for very small pipes (diameters less than 50mm, 2").
W method installation diagram