FS1023 Liquid Flow Sensor Module Equivalent & Substitute Parts

Part Overview

The FS1023 is a liquid flow sensor module manufactured by Renesas Electronics Corporation, designed for flow measurement applications in the 0–3 LPM range. The product is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The FS1025 serves as the manufacturer-recommended alternative, offering expanded measurement capability while maintaining core electrical and mechanical compatibility.

Substiute Parts

FS1023

Renesas Electronics CorporationIn Stock: 769FS1023 Datasheet

Current PartRFQ

FS1025

Renesas Electronics CorporationIn Stock: 826FS1025 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The FS1025 is classified as a direct manufacturer-recommended substitute for the FS1023. Substitution eligibility is determined by the following parameters:

• Voltage Input Compatibility: Both parts operate within the 5V–5.5V input range, ensuring direct electrical compatibility with existing power supply designs.
• Flow Sensor Type: Both are liquid flow sensors with logic-level switch function, maintaining functional equivalence in measurement applications.
• Material and Environmental Ratings: Identical plastic body construction and operating temperature range (5°C–75°C) ensure mechanical and thermal compatibility.
• Regulatory Compliance: Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (9026.10.2040), confirming compliance alignment.
• Moisture Sensitivity: Both rated at MSL 1 (Unlimited), indicating no moisture-related handling restrictions.

The primary difference is the expanded sensing range of the FS1025 (0–7 LPM versus 0–3 LPM) and a larger port size (0.342" / 8.7mm versus 0.295" / 7.5mm). These differences do not preclude substitution but require verification of application-specific flow measurement requirements and port compatibility with existing fluid pathways.

Parameter Comparison

Engineering Selection Recommendations

The FS1025 is the manufacturer-recommended substitute for the obsolete FS1023. Selection of the FS1025 is supported by:

• Active Product Status: The FS1025 is in active production, ensuring long-term availability and supply chain continuity.
• Regulatory Alignment: Both parts maintain identical REACH, ECCN, and HTSUS classifications, confirming no compliance barriers to substitution.
• Electrical Compatibility: Identical 5V–5.5V input voltage specifications ensure direct integration with existing power delivery systems.
• Environmental Ratings: Matching operating temperature range and MSL ratings confirm thermal and moisture handling equivalence.

Substitution requires verification that the application's flow measurement requirements fall within the FS1025's 0–7 LPM sensing range and that the larger port size (0.342" / 8.7mm) is mechanically compatible with existing fluid connection points.

Frequently Asked Questions (FAQ)

Q: Can the FS1025 directly replace the FS1023 in existing designs?

A: The FS1025 is electrically and thermally compatible with the FS1023. However, the larger port size (0.342" versus 0.295") must be verified for compatibility with existing fluid pathway connections. The expanded sensing range (0–7 LPM) accommodates applications previously limited to the FS1023's 0–3 LPM range.

Q: What are the key differences between the FS1023 and FS1025?

A: The primary differences are sensing range (FS1023: 0–3 LPM; FS1025: 0–7 LPM) and port size (FS1023: 0.295" / 7.5mm; FS1025: 0.342" / 8.7mm). All other electrical, thermal, and regulatory parameters are identical.

Q: Are there any compliance or certification concerns with substituting the FS1025 for the FS1023?

A: No. Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (9026.10.2040). Substitution does not introduce compliance barriers.

Q: Does the FS1025's larger port size affect system performance?

A: Port size affects mechanical fit within fluid pathways. The larger diameter of the FS1025 (0.342" / 8.7mm) must be verified for compatibility with existing tubing or connection points designed for the FS1023's 0.295" (7.5mm) port.

Q: Is the FS1025 suitable for applications requiring the FS1023's 0–3 LPM range?

A: Yes. The FS1025's 0–7 LPM range encompasses the FS1023's 0–3 LPM specification. Applications operating within the lower range will function correctly with the FS1025.

Q: What is the inventory status of these parts?

A: The FS1023 is obsolete with 724 units in stock. The FS1025 is active with 800 units in stock, providing reliable availability for new orders and ongoing supply.