FlowT FT101 Hydraulic Oil Ultrasonic Flow Meter
The FlowT FT101 Hydraulic Oil Ultrasonic Flow Meter is a wall-mounted, clamp-on transit-time flow measurement solution designed for hydraulic oil, clean oil, water, chemicals and other acoustically suitable single-phase liquids.
With ±0.5% reading accuracy, 25–5000 mm pipe coverage, RS485 communication, 4–20 mA output and IP68 transducers, the FT101 provides project buyers with accurate flow monitoring without installing a meter body directly into the liquid stream.For hydraulic systems, oil circulation lines and retrofit projects, the external clamp-on design can help reduce pipe modification, installation work and unnecessary process interruption.
FEATURE 01
±0.5% of Reading Accuracy for industrial flow monitoring
FEATURE 02
Clamp-On Non-Intrusive Measurement without cutting into the pipe
FEATURE 03
Hydraulic Oil & Clean Oil Applications subject to acoustic compatibility
FEATURE 04
RS232 / RS485 / Modbus Communication for industrial system integration
FEATURE 05
4–20 mA, OCT and Relay Outputs for flexible control requirements
FEATURE 06
IP68 Transducers for demanding sensor installation environments
Why Choose the FlowT FT101 for Hydraulic Oil Measurement?
±0.5% Accuracy for Industrial Monitoring
The FT101 provides a specified accuracy of ±0.5% of reading, with 0.15% repeatability and ±0.5% linearity.This makes it suitable for industrial applications where buyers require more reliable flow information for equipment monitoring, hydraulic-system evaluation, oil circulation analysis and process control.For project approval, final performance should always be evaluated together with the pipe condition, liquid properties, installation position and flow velocity.
Measure Without Contacting the Hydraulic Oil
The clamp-on transducers are mounted externally on the pipe and do not come into direct contact with the oil.This makes the FT101 particularly attractive for hydraulic oil, chemical and other applications where users want to avoid adding wetted mechanical components to the process.External measurement can also reduce concerns related to leakage points, pressure-containing connections and contamination introduced during installation.
No Pipe Cutting for Clamp-On Installation
Installing a conventional inline flow meter may require cutting the pipeline, adding flanges or threaded connections, draining the system and coordinating shutdown work.The FT101 clamp-on configuration is mounted externally, helping simplify flow measurement on existing pipelines.For machine builders, maintenance departments and retrofit contractors, this can reduce installation work and shorten the path from measurement requirement to commissioning.
Wide 25–5000 mm Pipe Coverage
The FT101 supports pipe sizes from 25 mm to 5000 mm, with pipe sizes below 1 inch available as an option.This wide measurement range allows the same FlowT product family to support hydraulic and industrial liquid pipelines across very different diameters.For distributors and EPC contractors, broad pipe coverage can simplify product standardization across multiple project requirements.
RS485 / Modbus for Automation Integration
RS485/Modbus for Automation Integration
The FT101 supports RS232 / RS485 communication, with Modbus available in the standard configuration reference.
This makes flow data easier to integrate into:
- PLC systems
- SCADA platforms
- Industrial gateways
- Machine control systems
- Remote monitoring systems
- Data acquisition systems
Low-Velocity Measurement Capability
Hydraulic and lubrication systems may experience operating conditions where flow velocity is lower than in conventional water pipelines.The FT101 is designed with FlowT's TGA calculation technology and a high sampling rate to support stable low-velocity measurement.The published FT101 velocity range extends down to approximately ±0.01 m/s depending on configuration and documentation reference, making low-flow capability an important part of the product positioning.
Hydraulic Oil Flow Meter Applications
Hydraulic Power Units
Hydraulic power units rely on stable oil circulation to supply actuators, cylinders and hydraulic machinery.The FT101 can be used to add flow monitoring to compatible hydraulic circuits, helping engineers observe system operation without placing an additional measuring body into the oil path.
Typical Buyers: Hydraulic equipment manufacturers, maintenance engineers, automation integrators
Lubrication Oil Systems
Industrial equipment such as compressors, turbines, gearboxes and large rotating machines may require continuous lubrication-oil circulation.External ultrasonic measurement can provide additional flow visibility while keeping the sensing elements outside the oil stream.
Typical Buyers: Power plants, heavy industry, equipment manufacturers
Oil Circulation and Cooling Systems
Oil circulation systems are used for lubrication, cooling and heat transfer in industrial machinery.Monitoring flow can help operators identify abnormal circulation conditions and verify that oil is reaching critical equipment.The FT101 can provide continuous measurement with analog and digital outputs for system monitoring.
Hydraulic Test Benches
Hydraulic component and machinery manufacturers often need flow data during testing and performance verification.The FT101 provides a non-intrusive flow measurement option for suitable test-loop piping and can transmit flow data to control or data-acquisition systems.
Typical Buyers: Hydraulic component manufacturers, R&D departments, test-system integrators
Industrial Oil Pipelines
Process plants may use oil pipelines for transfer, circulation, lubrication or utility functions.With pipe coverage extending from 25 mm to 5000 mm, the FT101 can be considered for a wide range of compatible industrial oil pipelines.
Typical Buyers: Factories, EPC companies, process plants
Retrofit Flow Monitoring
Existing machinery may need additional flow monitoring after commissioning.A clamp-on ultrasonic meter can be especially useful in retrofit situations because the external sensors can be installed without inserting an inline measurement body into the system.
Typical Buyers: Maintenance companies, plant engineers, retrofit contractors
Specifications
| Series Product Name FT Series Ultrasonic Flowmeter |
Product Model FT101 |
Fluid Single medium liquid |
| Flow Range ±0.01m/s ~ ±12m/s |
Accuracy ±0.5% of reading |
Repeatability 0.1% of measured value |
| Linearity ±0.5% |
Pipe Size 25mm ~ 5000mm |
Pulse Output 0 ~ 9999KHz, OCT |
| Analog Output 4 ~ 20mA, Max load 750Ω |
Communication RS232 & RS485 |
Power Supply 90 to 245 VAC, 48 to 63 Hz, Or 10 to 36 VDC |
| Humidity Up to 99% RH, Non-Condensing |
Temperature Transmitter: -40°F ~ 140°F Transducer: -40°F ~ 176°F 32°F ~ 356°F |
Display 240*128 back lit LCD |
FAQ
Q: Can the FT101 measure hydraulic oil?
A: Yes. FlowT lists the FT101 for oil-industry applications, and hydraulic oil is a suitable target application when the liquid and pipe conditions allow stable transit-time ultrasonic transmission. Oil type, temperature, pipe material, pipe size and the presence of air bubbles should be reviewed before final model selection.
Q: Does the sensor contact the hydraulic oil?
A: No. In the standard clamp-on FT101 configuration, the ultrasonic transducers are mounted on the outside of the pipe and do not directly contact the hydraulic oil.
Q: Does installation require cutting the hydraulic pipe?
A: The clamp-on transducer installation itself does not require an inline meter body to be inserted into the pipeline, so the external sensors can be installed without cutting the pipe for the measurement sensor.
Q: What is the accuracy of the FT101?
A: The published FT101 accuracy is ±0.5% of reading, with 0.15% repeatability.
Q: What is the flow velocity range?
A: The FT101 documentation lists a flow velocity range up to approximately ±12 m/s, with low-velocity capability extending to approximately ±0.01 m/s in the ordering reference.
Q: What pipe sizes can the FT101 measure?
A: The published pipe range is 25 mm to 5000 mm, with applications below 1 inch available as an option.
Q: What if my hydraulic oil is hot?
A: FlowT offers different transducer temperature configurations. The standard clamp-on version is rated to approximately +80°C, while a high-temperature clamp-on option is available up to approximately +150°C.
Q: Can the FT101 measure very viscous oil?
A: Ultrasonic measurement suitability depends on acoustic transmission, not viscosity alone. For high-viscosity hydraulic or process oils, send FlowT the oil type, viscosity, temperature and pipe information for application review before ordering.
Q: Can bubbles affect the measurement?
A: Yes. Gas bubbles can weaken ultrasonic transmission and reduce transit-time measurement quality. The pipe should normally remain completely full and applications with heavy entrained air or unstable two-phase flow should be evaluated carefully.
Q: Does the FT101 support RS485?
A: Yes. The FT101 supports RS232 and RS485, and its standard configuration reference includes Modbus communication.
Q: Does it have a 4–20 mA output?
A: Yes. The FT101 provides a 4–20 mA analog output with a maximum load of 750 Ω.
Q: Does it support pulse and relay outputs?
A: Yes. The FT101 supports OCT pulse output and relay output according to the published specification.
Q: Is the FT101 waterproof?
A: The FT101 transducer is IP68, while the wall-mounted transmitter is IP65. These ratings should be considered separately when designing the installation.
Q: Can the FT101 measure oil in a lined pipe?
A: It may be possible depending on the pipe and lining material, thickness and condition. Provide pipe-wall and lining information so FlowT can evaluate ultrasonic signal transmission before recommending the product.
Q: Can I request a sample?
A: Yes. Sample evaluation can be discussed after the hydraulic oil application and correct transducer configuration are confirmed.
Q: Does FlowT support OEM/ODM?
A: OEM/ODM requirements can be discussed for hydraulic equipment manufacturers, distributors and project buyers according to quantity and technical requirements.
Need to Measure Hydraulic Oil Without Cutting the Pipe?
Send FlowT your hydraulic oil type, pipe diameter, pipe material, operating temperature and expected flow range.
Our technical team can review the application and help confirm the appropriate FT101 transducer, temperature range and output configuration before quotation.
Include your required quantity and destination country for faster project evaluation.
Accuracy：±1%
Display：2×20 character LCD with backlight, supports the languages of Chinese, English.
Signal Output :1 way 4~ 20mA output, electric resistance 0~ 1K, accuracy 0. 1%
1 way OCT pulse output( Pulse width 6~ 1000ms,default is 200ms)
1-way Relay output
Signal Input: 3-way 4~20mA input, accuracy 0. 1%, acquisition signal such as temperature, pressure, and liquid level
Connect the temperature transducer PT1000, Can finish the heat/energy measurement
Data Interface: Insulate RS-485 serial interface, upgrade the flowmeter software by computer, support the MODBUS
Special Cable: Twisted-pair cable, generally, the length is under 50 meters; Select the RS485, transmission distance can be over 1000m
Pipe Installation Condition: Pipe Material, Steel, Stainless steel, Cast iron, Copper, Cement pipe, PVC, Aluminum, Glass steel product, liner is allowed
Pipe Diameter：25~ 1200mm
Transducer installation should be satisfied: upstream10D, downstream 5D, 30D from the pump
Measuring Medium： Type of Liquid(A single liquid can transmit a sound wave)
such as Water (hot water, chilled water, city water, sea water, waste water, etc.)
Sewage with small particle content; Oil ( crude oil, lubricating oil, diesel oil, fuel oil, etc. ) ;
Chemicals ( alcohol, etc. ); Plant effluent; Beverage; Ultra-pure liquids, etc.
Temperature
Convertor:- 20~ 60℃;Flow Transducer:- 30~ 180℃
Humidity
Convertor: 85% RH;Flow Transducer:can measure under water, water depth≤2m(tansducer sealed glue)
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