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Renesas FS1025
- Part No.:
- FS1025
- Manufacturer:
- Renesas
- Category:
- Flow Sensors - Industrial
- Package:
- Datasheet:
-
FS1025.pdf
- Description:
- LIQUID FLOW SENSOR MODULE, AMPLI
- Quantity:
- Payment:
- Shipping:
Inventory:3,902
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Product details
Overview
FS1025 from Renesas Electronics is a liquid flow sensor module using calorimetric (thermo-transfer) sensing with thermopile detection, delivering analog voltage output (0–5 V) across 0–7 L/min water flow range at 5 V supply, and featuring heater enable control and integrated temperature monitoring via TEMP pin.
For engineers reviewing the FS1025 datasheet, FS1025 pinout, FS1025 application, or FS1025 equivalent, key selection considerations include its non-linear analog output curve, solid thermal isolation architecture, 5 ms flow response time, HE-controlled micro-heater operation, and compatibility with 7/16″ ID tubing and PHR-6 connectors.
Technical Context
The FS1025 implements a calorimetric flow measurement principle: a micro-heater warms a silicon-carbide thin-film sensor element, and thermopile-based differential temperature detection generates an analog output proportional to mass flow. Its solid thermal isolation eliminates fluidic moving parts and enhances vibration resistance.
Operation requires external +5 V on VDD and HE pins; HE enables/disables the heater for power management. The OUTPUT pin delivers a non-linear voltage (0–5 V) correlated to flow via quadratic approximation, while TEMP provides a separate analog voltage (4.25 V @ 5°C → 1.0 V @ 80°C) for ambient temperature compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Liquid Flow Range | 0–7 L/min with water at room temperature - defines full-scale measurable flow without saturation or turbulence-induced error. |
| Analog Output Range | 0–5 V (non-linear) - maps to flow via quadratic equation; requires host-side calibration or lookup table for linearized flow reading. |
| Supply Voltage | 5 V nominal, 5.5 V max - mandates stable 5 V rail; exceeds typical 3.3 V MCU supply, requiring level-aware interface design. |
| Flow Response Time | 5 ms (10%–90% rise) - enables real-time flow event detection in fast-cycling dispensing or leak-monitoring systems. |
| Heater Enable Control | Dedicated HE pin (active-high @ +5 V) - allows pulsed operation to reduce average power consumption below 20 mA typical. |
| Temperature Output | Analog voltage (4.25 V @ 5°C → 1.0 V @ 80°C) - supports cold-junction compensation of flow signal or independent ambient monitoring. |
| Static Pressure Rating | 30 PSI maximum - constrains use in high-pressure plumbing or industrial hydraulic lines without pressure-reducing staging. |
Pinout & Package
FS1025 is housed in a 60.0 × 31.5 mm module with a 6-pin board-to-wire crimp-style connector (compatible with JST PHR-6 receptacle). Pinout is validated per Renesas R36DS0005EU0102 Rev.1.02, Page 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Power Input | 5 V supply input; must be decoupled locally to suppress noise coupling into thermopile signal path. |
| 2 - GND | Reference Ground | Analog and digital ground reference; requires low-impedance connection to minimize offset drift in OUTPUT and TEMP. |
| 3 - OUTPUT | Analog Flow Signal | Non-linear 0–5 V output; connects to ADC input with ≥10-bit resolution and software linearization support. |
| 4 - NC | No Connection | Internally unconnected; must remain floating - no pull-up/down or routing allowed. |
| 5 - HE | Heater Enable Control | Active-high logic input; drives internal micro-heater - tie to +5 V for continuous operation or pulse for duty-cycle power savings. |
| 6 - TEMP | Temperature Sensor Output | Analog voltage representing housing temperature; used for thermal compensation or system-level thermal awareness. |
Key Features
| Feature | Design Value |
|---|---|
| Calorimetric Thermopile Sensing | Eliminates moving parts and wear; achieves high SNR without amplification stages that introduce drift or noise. |
| Solid Thermal Isolation | Uses silicon-carbide thin film and epoxy encapsulation to isolate sensor thermally from housing - ensures stable zero-flow baseline under vibration or pressure shock. |
| Micro-Heater with HE Control | Enables on-demand heating - reduces average current draw below 20 mA and extends lifetime in battery-powered metering applications. |
| Integrated Temperature Monitoring | Provides independent TEMP analog output - allows real-time correction of flow signal drift due to ambient temperature changes. |
| Low Flow Resistance Design | Minimizes pressure drop across module - critical for gravity-fed or low-head water dispensers where backpressure affects delivery rate. |
Applications
| Water Dispensers | Liquid Metering Switches |
|---|---|
Use Scenario: Precise single-serve water dispensing in office or healthcare settings with volume accuracy and leak detection capability. IC Role / Device Role / Timing Role: Flow sensor module providing real-time analog flow feedback to microcontroller for volume-integration and shutoff control. Use Value: Enables ±5% volumetric accuracy over 0.5–7 L/min range with minimal mechanical wear, supporting >1 million actuation cycles. | Use Scenario: Triggering solenoid valves when preset liquid volume is dispensed in chemical dosing or beverage mixing systems. IC Role / Device Role / Timing Role: Analog flow threshold detector - OUTPUT voltage compared against reference to assert switch signal after integrated flow count. Use Value: Replaces mechanical flow switches with higher repeatability, no spring fatigue, and immunity to particulate clogging. |
| Process Flow Monitoring | Leak Detection Systems |
Use Scenario: Continuous flow verification in pharmaceutical rinse cycles or clean-in-place (CIP) lines where flow cessation indicates blockage or pump failure. IC Role / Device Role / Timing Role: Real-time flow presence and rate monitor feeding PLC or embedded controller via ADC sampling at ≥100 Hz. Use Value: 5 ms response time enables detection of abrupt flow loss within 10 ms - faster than pneumatic or turbine-based alternatives. | Use Scenario: Detecting abnormal low-flow conditions during standby periods in residential or commercial plumbing networks. IC Role / Device Role / Timing Role: Ultra-low-flow sentinel - monitors for sustained sub-0.1 L/min flow using calibrated NULL voltage (0.005 V) and long-interval sampling. Use Value: Solid thermal isolation prevents false triggers from thermal transients, enabling reliable 24/7 background monitoring without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar liquid flow sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Sensirion SLF3S-1300F | 0–40 mL/min full scale; digital I²C output; MEMS-based thermal anemometer; 3.3 V supply. | Targeted at microfluidic medical devices, not macro-scale water dispensing or industrial flow rates. | Select SLF3S-1300F only for ultra-low-flow (<50 mL/min), low-power, digital-interface applications - not a direct functional substitute for FS1025's 0–7 L/min range. |
| Honeywell AWMA31000V | Analog output (0.5–4.5 V); 0–10 L/min range; requires external 12 V supply; no integrated temperature output. | Designed for HVAC refrigerant monitoring; lacks HE control and solid isolation - less robust under pressure shock. | AWMA31000V suits high-pressure HVAC use but requires additional temperature compensation circuitry and cannot match FS1025's vibration resilience in portable dispensers. |
Compared with SLF3S-1300F and AWMA31000V, the FS1025 uniquely combines 0–7 L/min water flow range, 5 V operation, heater enable control, integrated temperature output, and solid thermal isolation - making it optimal for rugged, medium-flow, analog-interfaced dispensing and process monitoring.
Availability
FS1025 is available at Aetrix Electronics and suitable for water dispensers, liquid metering switches, and process flow monitoring requiring stable component supply, consistent calibration, and long-term reliability in 0°C to +70°C ambient environments.
Supply support for FS1025 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, and sensor solutions for industrial, automotive, and IoT applications.
The FS1025 belongs to Renesas' liquid flow sensor module product line, designed specifically for contactless, maintenance-free flow measurement in water-based dispensing, metering, and process control systems.
FAQ
What is the operating temperature range for the FS1025?
The FS1025 is rated for ambient operating temperatures from 0°C to +70°C in air. Its thermistor-based TEMP output (4.25 V at 5°C, 1.0 V at 80°C) enables thermal compensation across this range. Operation outside these limits may cause calibration drift or permanent damage, as storage temperature is limited to 0–85°C per absolute maximum ratings.
Does the FS1025 require external calibration for accurate flow measurement?
Yes, the FS1025 requires host-side calibration due to its non-linear analog output. The datasheet provides the quadratic approximation Flow = 0.2×VOUT² + 0.3×VOUT + 0.5 for water at room temperature. For highest accuracy, users should perform multi-point flow calibration across the 0–7 L/min range and store coefficients in firmware - the FS1025 itself contains no internal calibration memory.
Can the FS1025 measure fluids other than water?
The FS1025 is characterized and specified for water; flow readings for other liquids (e.g., ethanol, glycol, oil) will vary due to differences in thermal conductivity and specific heat. Renesas does not provide correction factors or validation data for non-water fluids. Use in other media requires full system-level recharacterization and validation of accuracy, response time, and long-term stability.
What is the purpose of the HE (Heater Enable) pin on the FS1025?
The HE pin controls power to the internal micro-heater. When pulled high to +5 V, the heater activates to enable calorimetric flow measurement. When grounded or left floating (per datasheet), the heater is disabled - reducing current draw to near-zero standby. This allows duty-cycled operation in battery-powered FS1025 deployments to extend operational life.
What tubing size is recommended for the FS1025 module?
The FS1025 features barb-type fluid connections designed for soft tubing with a nominal inner diameter of 7/16 inch (11.1 mm). A hose clamp is recommended to ensure secure attachment and prevent disconnection under pressure or vibration. Using undersized or rigid tubing may cause leakage, excessive backpressure, or mechanical stress on the module housing.
FS1025 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Package/Case:
- Sensing Range:
- 0 ~ 7 LPM
- Flow Sensor Type:
- Liquid
- Voltage - Input:
- 5V ~ 5.5V
- Port Size:
- Female, 0.342" (8.7mm)
- Switch Function/Rating:
- Logic
- Material - Body:
- Plastic
- Operating Temperature:
- 5°C ~ 75°C
FS1025 FAQ
1.How can I place an order for FS1025 through Aetrix?
Please submit a Request for Quotation (RFQ) for FS1025 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for FS1025 reliable?
The price and inventory of FS1025 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FS1025 is usually 5 days.
3.What payment methods are accepted for FS1025?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FS1025 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FS1025?
FS1025 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FS1025 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for FS1025?
For technical support, including FS1025 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FS1025 requirements.
6.How does Aetrix verify that FS1025 is sourced from the original manufacturer or authorized distributors?
All FS1025 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FS1025 meets industry standards.
7.What is the process for return or replacement of FS1025?
All FS1025 units undergo pre-shipment inspection (PSI). If there is an issue with FS1025, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The FS1025 part is unused and in its original packaging.
Return procedure for FS1025:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FS1025 Tags
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FS15LF
Sensata Technologies, Inc.
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071-06403
TE Connectivity Measurement Specialties
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SFM3020
Sensirion AG
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LG01-2000A005
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SC0516
ifm efector, inc.
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US0014-001
Audiowell International LLC
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071-06402
TE Connectivity Measurement Specialties
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FS1027
Renesas
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FS1015CL-150-ISO-A
Siargo Ltd
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FS15A
Sensata Technologies, Inc.
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SI5000
ifm efector, inc.
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SV7614
ifm efector, inc.
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