IFM IE5099 Inductive Proximity Sensor

(Full Model: IEC3002-BPKG)

Basic Information

Product Type: Inductive proximity sensor (cylindrical threaded housing)

Mounting Style: M8×1, non-flush (non-embeddable)

Nominal sensing distance Sn: 2 mm

Output: DC 3-wire PNP Normally Open (NO)

Cable Version: 2 m PUR straight cable

Complete Electrical Specifications

Mechanical & Environmental Specifications

Dimensions: M8×1, overall length L=35 mm (ultra-short housing for confined mounting space)

Housing material: Plastic

Protection class: IP67

Operating temperature: -25 ℃ … +80 ℃

Storage temperature: -40 ℃ … +85 ℃

Vibration/shock resistance: Compliant with IEC 60947-5-2

Cable Assignment (3-wire system)

Brown BN: DC+ (Power positive)

Blue BU: 0V / GND

Black BK: PNP signal output (NO)

PNP Wiring Tip: Connect black wire to PLC input; common terminal of PLC inputs connects to 0V. When metal approaches the sensor, high level is output on black wire.

Model Code Decoding IE5099 = IEC3002-BPKG

1. IE: M8 cylindrical inductive sensor series
2. C: Non-flush mounting
3. 3002: M8 thread, sensing distance 2 mm
4. B: 2 m fixed cable
5. P: PNP output
6. K: Normally Open (NO)
7. G: Standard DC protection circuit

Typical Applications

Small tooling fixtures, miniature cylinder position detection, compact conveying mechanisms, high-speed cam detection, robot end-stop limit; ideal for equipment with limited installation space.

Alternative IFM Equivalent Models

Requirement for NPN Normally Open: IE5100 (same housing)

Requirement for M8 plug version (M8 4-pin): IE5098

⚠️ Important: Distinguish flush / non-flush types. Flush sensors feature shorter sensing distance and cannot be directly interchanged.

Mandatory Rules & Troubleshooting Guidelines

1. For non-flush sensors: Keep an area free of metal (minimum 3×Sn = 6 mm) around the sensing face. Otherwise, reduced sensing range and false switching will occur;
2. Not suitable for permanent submersion. IP67 only protects against temporary water spray;
3. Target material correction factor: Steel=1, stainless steel≈0.7, aluminum≈0.4; effective detection distance drops significantly for aluminum targets;
4. Multiple sensors mounted side by side: Maintain spacing ≥3×Sn to avoid mutual magnetic interference.

Operating Principle of Cylindrical Threaded Inductive Proximity Sensors

(Applies to M8/M12/M18/M30 types including IFM IE5099)

1. Core Principle: High-frequency Alternating Magnetic Field + Eddy Current Effect

Inductive proximity sensors only detect conductive metals. Plastics, wood, glass and liquids cannot be detected.

Three core internal circuits: High-frequency oscillator circuit, demodulator circuit, signal shaping & output circuit.

(1) Oscillation State (No metal nearby)

A coil-capacitor LC oscillator is built into the sensor head. After power-on, it continuously generates a high-frequency alternating magnetic field radiating outward.

Oscillation amplitude remains stable. The subsequent detection circuit judges: No metal → output initial state

For PNP NO sensors (e.g. IE5099): No high level at output.

(2) Eddy Current Attenuation State (Metal enters sensing zone)

When a metal target approaches the sensing face, the alternating magnetic field penetrates the metal surface. Closed eddy currents are induced inside the metal according to electromagnetic induction law.

Eddy currents generate a reverse magnetic field counteracting the original magnetic field from the sensor coil.

Energy is consumed by eddy currents → LC oscillator amplitude decreases, and may stop oscillating.

(3) Signal Conversion & Output

The demodulator continuously monitors oscillation amplitude:

Sharp amplitude drop → Metal target detected;

Signals pass Schmitt trigger shaping and drive transistor circuits to switch output status (PNP/NPN turn on/off).

Summary:

Power on → oscillator runs → metal induces eddy currents → oscillation attenuates → circuit detects metal and triggers switching.

2. Key Terminology (For Selection & Commissioning)
3. Flush Mounting / Non-flush Mounting

Flush (embeddable): Sensor head can be embedded into metal brackets. Optimized coil shielding improves resistance to surrounding metal interference, at the cost of smaller nominal sensing distance Sn.

Non-flush (non-embeddable, IE5099 type): Sensor head shall not be surrounded by metal. Longer sensing distance, yet sufficient metal-free clearance around sensing face is required; otherwise magnetic field is absorbed and false switching occurs.

2. Nominal sensing distance Sn

Rated distance tested under standard conditions (mild steel, standard target size). Effective distance reduces for stainless steel, aluminum and copper (correction factor < 1).

3. Hysteresis

Operating distance (metal approaching) reset distance (metal moving away).

Function: Prevent frequent chattering and false switching caused by mechanical vibration.

Standard specification ≤15%Sn (matches IE5099 parameter).

3. Output Logic of 3-wire DC Sensor (IE5099 PNP NO Example)

Brown: DC10~36V+

Blue: 0V GND

Black: Signal output

✅ Metal approaches → Internal transistor conducts → Black wire outputs high potential (close to supply voltage)

NPN type works oppositely: Signal wire pulls down to 0V when metal is detected.

4. Common Misconceptions
5. ❌ It does NOT rely on permanent magnets! No magnet required; only conductive metal can trigger detection. Hall effect sensors detect magnetic fields — the two principles are completely different.
6. ❌ Unable to detect non-conductive materials;
7. ❌ Stability decreases at longer distances. Recommended working distance ≤ 0.7×Sn for installation margin.
8. Mechanical Structure Explanation for Cylindrical Threaded Sensors

The threaded body serves only mechanical mounting purposes. The effective sensing area is the front end face. Magnetic field radiates mainly forward; lateral detection capability is extremely weak.

Application Scenarios of Cylindrical Threaded Inductive Proximity Sensors

(M8/M12/M18/M30 series, e.g. IFM IE5099 M8)

Core characteristics recap: Metal-only detection, non-contact operation, zero mechanical wear, fast response, resistant to oil mist and dust. Selection considerations: flush/non-flush, PNP/NPN, Normally Open/Normally Closed.

1. Machine Tools & Metalworking
2. Position detection of pneumatic cylinder pistons

Miniature cylinder limit detection using compact M8 sensors (IE5099 preferred) mounted externally to sense embedded metal rings on pistons. Advantage over magnetic switches: immunity to strong magnetic fields.

2. Tool in-place detection & tool magazine positioning

Confirmation of tool holder seating and tool clamping; triggered by metal tool bodies.

3. Soft/hard travel limit and homing for feed axes

Machine origin reference and travel protection for servo slides, actuated by metal striker plates.

4. Workpiece presence detection

Detection of steel blanks and stamped parts on guide conveyors.

2. Conveying & Packaging Equipment
3. Counting and presence detection of metal workpieces on conveyor belts

Metal pallets and hardware component detection on chain and roller conveyors.

⚠️ Cannot detect plastic containers without internal metal components.

2. Lifting platform position signal, stop cylinder position feedback
3. Position confirmation for cutting blades and pressing mechanisms on packaging machines
4. Detection of metal fittings on cartons (metal clips, metal cans)
5. Robotics & Custom Automation
6. Open/close position detection of robot grippers

Compact M8 threaded sensors (IE5099) widely used for miniature grippers in tight spaces.

2. Tooling positioning & fixture clamping confirmation

Triggered by metal target plates on clamping blocks to verify correct workpiece loading.

3. Origin reference and indexing of rotary mechanisms

High-speed position detection using cams and metal target plates (switching frequency up to kHz level).

4. Simplified anti-collision alarm for machinery
5. Injection Molding & Rubber Machinery
6. Ejector pin end position and core pull limit signals for molds
7. Position monitoring of metal screws inside barrels
8. Position confirmation for take-out robots

Operating environment features oil and moisture; IP67 sensors with PUR oil-resistant cables are preferred.

5. Automotive Manufacturing
6. Station positioning and fixture clamping feedback for welding lines
7. Slide position and safety limit for stamping equipment
8. Recognition of component transport racks
9. Mechanical position feedback for torque tools and assembly equipment
10. Construction Machinery & Hydraulic/Pneumatic Systems
11. External stroke position feedback for hydraulic cylinders
12. Spool position indication for valves
13. Low-speed speed measurement via gear teeth: Pulses generated as gear teeth pass the sensor
14. Elevators, Lifting & Warehousing Equipment
15. Floor arrival detection for freight elevators
16. Metal collision avoidance and position calibration for stackers and AGVs

Application Matching by Housing Size

1. M8 (IE5099 type)

Space-restricted applications: Miniature cylinders, small grippers, compact rotary mechanisms, narrow tooling fixtures, precision small conveying equipment.

Limitation: Short nominal sensing distance (2 mm); target metal size cannot be excessively small.

2. M12

General-purpose: Machine limit switches, standard cylinders, workpiece detection on conveyors. Typical Sn = 4 mm.

3. M18

Medium sensing range (5/8 mm). Suitable for applications with workpiece vibration and larger installation clearance tolerance.

4. M30

Long sensing distance (10/15 mm). For heavy-duty machinery and long-distance metal detection.

⚠️ Critical Selection & Installation Guidelines

1. Non-flush sensors (IE5099)

Avoid mounting sensing face closely against metal brackets. Maintain sufficient metal-free clearance around sensing face; otherwise magnetic field absorption leads to unstable detection and false signals.

2. Material attenuation effect

Mild steel delivers optimal performance; effective distance drops sharply for stainless steel, aluminum and copper. Increase installation margin for aluminum targets.

3. Unsuitable targets: Plastics, wood, rubber, glass, liquids

Use photoelectric or capacitive sensors for non-metal detection.

4. Vibration-prone equipment

Pay attention to sensor hysteresis to avoid signal chattering.

5. Multiple sensors installed adjacent

Maintain minimum spacing ≥3×Sn between sensors to prevent mutual magnetic interference.