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ST502 Clamp-on Ultrasonic Flowmeter with Transit-Time Technology IP65 Enclosure and RS485 Communication

Name: ST502 Clamp-on Ultrasonic Flowmeter with Transit-Time Technology IP65 Enclosure and RS485 Communication
Brand: Flo-Instruments Co., Ltd
SKU: ST502
Availability: InStock

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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Product Details

Product Description

Highlight:

Repeatability:	0.15%	Output:	4-20mA, OCT Pulse Output, Relay Output, RS-232 / RS-485, RTD Temp. Input
Transducers Temperature:	-40℉ ~ +140℉ (-40℃~+60℃)	Velocity Range:	0.03 ~±40ft/s (0.01~±12m/s)
Power Supply:	24V DC	Pipe Size:	DN25-DN5000

Repeatability:	0.15%
Output:	4-20mA, OCT Pulse Output, Relay Output, RS-232 / RS-485, RTD Temp. Input
Transducers Temperature:	-40℉ ~ +140℉ (-40℃~+60℃)
Velocity Range:	0.03 ~±40ft/s (0.01~±12m/s)
Power Supply:	24V DC
Pipe Size:	DN25-DN5000

ST502 Clamp-on Ultrasonic Flowmeter with Transit-Time Technology IP65 Enclosure and RS485 Communication

ST502 Advanced Data Center Flow Measurement Instruments

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.

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.

Technical Specifications

Performance Specifications

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

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

Normal Transducer

High-temperature Transducer

Ultra High-temperature Transducer

Product Display

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.

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

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.
Z Method Utilizes directly transmitted signals with less attenuation. Suitable for pipe diameters 100mm to 3000mm (4"~120").
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.
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").

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