Pepperl+Fuchs ML4-8-KSU-2325 Photoelectric Sensor

Brand: Pepperl+Fuchs (P+F Visolux)

Order Model: ML4-8-KSU-2325

Factory Part No.: 419115

Product Type: ML4 Series Compact Square Diffuse-Reflective Photoelectric Sensor (Direct Detection Type)

1. Model Code Definition (ML4 Series Naming Rule)
2. ML4: Visolux ML4 Compact Square Photoelectric Switch Series
3. 8: Specification Code; Standard housing dimension of ML4 series
4. KSU

K: Adjustable sensitivity (potentiometer for sensing distance tuning)

S: Short-circuit protection, reverse polarity protection

U: Push-pull Output (4-in-1, NPN/PNP universal, Light-on/Dark-on switchable)

4. 2325: Factory internal version/custom suffix (special revision code corresponding to factory configuration; cannot be directly interchanged with standard ML4-8-KSU)

⚠️ Important Notice: ML4-8-KSU-2325 belongs to legacy ML4 series, declared obsolete by the manufacturer. No brand-new original production available. Only surplus stock and used second-hand units circulate in the market.

2. Basic Electrical Specifications (Shared Platform Parameters with ML4-8-KSU)

Supply Voltage: 10 … 30 V DC, max. ripple ≤10%

Output: Push-Pull, maximum load current 100 mA

Protection: Reverse polarity protection, output short-circuit protection

Light Source: Modulated Infrared LED

Housing: Compact ABS square enclosure

Protection Class: IP67

Connection: Fixed outgoing cable (2325 version is cable type, NOT M8 connector)

Indicators: Green LED for power, Yellow LED for output status

Operating Temperature: -25 ℃ … +55 ℃

3. Replacement Selection Guide (Obsolete Unit Migration Solution)

Official New-Generation Replacement Series: ML4.2 Series

Prior recommended equivalent model:

`ML4.2-8-H-KSU` (Adjustable Sensitivity, Push-Pull Output, Diffuse-Reflective)

Notes:

1. Mounting cutout dimensions are largely compatible, but spot size and maximum sensing distance require verification;
2. To retain identical wiring logic, prioritize models with suffix KSU (Push-Pull, Adjustable);
3. If equipment logic relies on original sensing distance, field testing and calibration are mandatory.
4. Critical Procurement Risk Reminders
5. Large quantities of counterfeit and refurbished second-hand products exist on the market; request serial number verification for purchasing;
6. Do not directly replace with base model ML4-8-KSU without suffix `2325`. Differences in factory-calibrated sensing distance and cable length may cause unstable detection;
7. When placing orders, provide both: Model ML4-8-KSU-2325 + Part No.419115 for supplier version confirmation.

Complete Compatible Replacement List for ML4-8-KSU-2325 (Part No.419115)

Recap of Original Model Specifications

Type: Legacy ML4 compact square diffuse-reflective photoelectric sensor with adjustable sensitivity

Output: KSU = Push-Pull (Universal NPN/PNP, Light-on/Dark-on switchable)

Power Supply: 10…30VDC; IP67; fixed cable outlet; potentiometer adjustable sensing distance; Manufacturer Obsolete

Suffix 2325 = Custom Revision (Fixed cable length, factory preset sensing range)

1. Legacy Same-Series Surplus Alternatives (Short-Term Emergency Replacement, Fully Compatible Mechanical Dimensions)

⚠️ Only for emergency procurement, stock quantity is scarce, mostly surplus inventory. Direct replacement without commissioning is prohibited; sensing distance calibration on site is required.

1. ML4-8-KSU (Base model without custom suffix)
2. ML4-8-KSU-1205 (Custom revision on the same platform)
3. ML4-8-KSU-2324 (Adjacent revision of 2325)

Risk Warning: Versions with different suffixes vary in cable length and factory sensing range setting; direct swap may lead to unstable detection.

2. Official Upgraded Replacement: ML4.2 Series (Long-Term Preferred Option, Continuous Mass Production)

ML4.2 is the full successor of ML4; mounting hole layout compatible, electrical characteristics highly matched. Prioritize models with suffix `KSU` (Adjustable + Push-Pull Output)

Tier 1 [Top Recommendation, Closest Function Match]

ML4.2-8-H-KSU

Output: Push-Pull, universal NPN/PNP, Light-on/Dark-on switchable; built-in short-circuit and reverse polarity protection

Adjustment: Body-mounted potentiometer for sensing distance tuning, consistent operation method with original unit

Housing: Mounting dimensions largely compatible with ML4-8-KSU; reinforced mounting holes

Light Source: Modulated infrared LED; Supply voltage 10~30VDC, IP67

Cable Version Distinction for Ordering:

ML4.2-8-H-KSU (Fixed cable outlet, matches cable-type ML4-8-KSU-2325)

ML4.2-8-H-KSU-V1 (M8 connector version, DO NOT select if original unit is wired cable type)

Tier 2 [Background Suppression Variant, for Applications Prone to Background Reflection Interference]

If false triggering caused by background reflection frequently occurs on site, upgrade to Background Suppression (BGS) type. Confirm sensing distance matching before selection:

1. ML4.2-8-H-20-IR/40b/95 (Max. sensing distance 20 mm, Background Suppression)
2. ML4.2-8-H-40-IR/40b/95 (Max. sensing distance 40 mm, Background Suppression)

⚠️ Note: Background suppression models do not carry KSU suffix with potentiometer, some versions cannot switch Light-on/Dark-on. ML4.2-8-H-KSU is preferred for standard operating conditions.

3. Cross-Series Backup Alternatives (When ML4.2 Long Lead Time or Limited Installation Space)

Pepperl+Fuchs Same-Brand Equivalents

1. RL42-8-H-KSU

Square photoelectric sensor, adjustable diffuse-reflective with push-pull output; housing slightly larger, minor modification for mounting bracket required; electrical parameters fully consistent.

2. ML100-8-H-350-RT/95/103

Long-range diffuse-reflective variant, suitable for applications requiring extended detection distance (Different housing outline, new mounting hole drilling needed)

Alternative Brands (Domestic/Imported Backup, Consistent Wiring Logic)

Wiring Specification: 3-wire DC Push-Pull Output, 10~30VDC

SICK WL12-2B430 (Adjustable diffuse-reflective, push-pull)

IFM OBS4000 (Compact square diffuse-reflective sensor)

4. Critical Guidelines for Replacement Implementation
5. Wiring Verification

Original ML4: Brown (+24V), Blue (0V), Black (Signal Output); ML4.2 retains identical pin assignment, no wiring modification required.

2. Sensing Distance Calibration

Factory preset range of ML4.2 differs from legacy ML4-8-KSU-2325. Rotate potentiometer to reset trigger threshold after installation.

3. Correct Cable Type When Ordering

Original sensor adopts fixed outgoing cable. Avoid mistakenly purchasing `-V1` (M8 circular connector version).

4. Inquiry Template (Copy directly to suppliers)

Existing Sensor: Pepperl+Fuchs ML4-8-KSU-2325 (Part No.419115, Obsolete)

Required Replacement: ML4.2-8-H-KSU, cable outlet type (DO NOT order V1 connector version), push-pull output, potentiometer adjustable diffuse-reflective photoelectric sensor.

5. Selection Priority Ranking

1️⃣ First Choice: ML4.2-8-H-KSU (Cable Version) [Long-term stable supply, maximum function consistency]

2️⃣ Emergency Temporary Option: Surplus legacy ML4-8-KSU / ML4-8-KSU-1205

3️⃣ Application with Heavy Reflection Interference: ML4.2-8-H-20-IR/40b/95 (Background Suppression, verify sensing distance first)

Complete Technical Data: Pepperl+Fuchs ML4.2-8-H-KSU

(Successor model of ML4-8-KSU-2325 by manufacturer)

Model Definition

ML4.2: New Generation Compact Square Photoelectric Series (ML4 Upgrade)

8: Housing Size Code

H: Diffuse-Reflective Sensor (Standard Diffuse, Non-BGS Background Suppression)

K: Potentiometer adjustable sensitivity

S: Short-circuit & reverse polarity protection

U: Push-Pull Output (Universal NPN/PNP, Light-on/Dark-on Selectable)

⚠️ Ordering Distinction:

ML4.2-8-H-KSU: Fixed cable outlet (Match cable-style ML4-8-KSU-2325)

ML4.2-8-H-KSU-V1: M8×1 4-pin connector version, DO NOT select!

1. Optical Parameters (Diffuse-Reflective Type)

2. Electrical Specifications (High Compatibility with Legacy ML4-8-KSU)

Standard Wiring Definition (Identical to ML4-8-KSU-2325, Direct Replacement Without Rewiring)

1. Brown Wire: DC + (10~30V)
2. Blue Wire: DC 0V
3. Black Wire: Signal Output
4. White Wire: Light-on/Dark-on Selection (Open circuit = Light-on; Connected to 0V = Dark-on)
5. Indicator Definition

Green LED: Steady ON = Power Normal; Slow Flashing = Undervoltage; Fast Flashing = Short Circuit

Yellow LED: Illuminated when target object is detected (Output Activated)

4. Mechanical & Environmental Parameters

5. Compliance & Certifications

CE, cULus Approved

Standard Implemented: EN 60947-5-2 / IEC 60947-5-2

6. Comparison Table: Legacy ML4-8-KSU-2325 VS ML4.2-8-H-KSU

7. Important Replacement Reminders
8. After installation, rotate potentiometer to recalibrate sensing threshold. Factory default setting differs from legacy model;
9. For applications with severe background reflection, standard diffuse KSU type is not recommended; upgrade to ML4.2 Background Suppression Series;
10. Complete model for purchase: ML4.2-8-H-KSU (Do not select -V1 connector version)。