Flo-Instruments Co., Ltd
| Output | 4-20mA, OCT pulse output, relay output, RS-232 / RS-485, RTD temp. input |
| Power Supply | 24V DC |
| Packaging Details | Conventional Packaging |
| Delivery Time | 3-5 working days |
| Pipe Size | DN25-DN5000 |
| Payment Terms | T/T |
| Transducers temperature | -40℉ ~ +140℉ (-40℃~+60℃) |
| Velocity Range | 0.03 ~±40ft/s (0.01~±12m/s) |
| Repeatability | 0.15% |
| Model Number | ST502 |
| Certification | CE; ISO9001 |
| Place of Origin | Shenzhen |
| Brand Name | Flo-Instru |
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Product Specification
| Output | 4-20mA, OCT pulse output, relay output, RS-232 / RS-485, RTD temp. input | Power Supply | 24V DC |
| Packaging Details | Conventional Packaging | Delivery Time | 3-5 working days |
| Pipe Size | DN25-DN5000 | Payment Terms | T/T |
| Transducers temperature | -40℉ ~ +140℉ (-40℃~+60℃) | Velocity Range | 0.03 ~±40ft/s (0.01~±12m/s) |
| Repeatability | 0.15% | Model Number | ST502 |
| Certification | CE; ISO9001 | Place of Origin | Shenzhen |
| Brand Name | Flo-Instru | ||
| High Light | ST502 clamp-on ultrasonic flowmeter ，ultrasonic flowmeter with RS485 communication ，IP65 enclosure flowmeter transit-time technology | ||
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.
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.
| 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... |
| 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 |
The ST502 offers multiple communication and output options for seamless integration into industrial control systems, enabling real-time data acquisition and remote monitoring.
| 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 |
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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. |
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Z Method
Utilizes directly transmitted signals with less attenuation. Suitable for pipe diameters 100mm to 3000mm (4"~120"). |
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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. |
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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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Company Details
Business Type:
Manufacturer
Ecer Certification：
Verified Supplier
Flo-Instruments has been specialized in the field of ultrasonic flow meters, and has over 20 years of relevant engineering and installation experience, covering clamp-on and insertion, wall-mounted and portable. We are keeping focusing on the development of industrial, commercial, and civilian ... Flo-Instruments has been specialized in the field of ultrasonic flow meters, and has over 20 years of relevant engineering and installation experience, covering clamp-on and insertion, wall-mounted and portable. We are keeping focusing on the development of industrial, commercial, and civilian ...
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