Name: Panasonic GX-108MKB Inductive Proximity Sensor - INOSAKI
SKU: Panasonic-GX-108MKB
Price: 25.37 USD
Availability: InStock

Technical Overview

The Panasonic GX-108MKB is a high-performance cylindrical inductive proximity sensor from the GX-100 series. This model features an M8 shielded barrel, designed for flush mounting in metallic surfaces. It is a 2x distance type with a nominal sensing range of 2 mm for standard ferrous targets. The sensor operates on a 12 to 24 VDC power supply and provides a Normally Closed (NC) NPN open-collector output. Engineered for demanding applications, it boasts a rapid 1.5 kHz response frequency, making it ideal for detecting fast-moving objects. The rugged housing is constructed from stainless steel with a PBT sensing face, sealed to an IP67 rating for superior resistance to dust and water. A standout feature is its transparent rear cap with an integrated, 360-degree viewable orange LED, offering unmistakable visual confirmation of the sensor's output status from any direction.

Key Features

M8 x 1 threaded stainless steel body for robust mounting
Shielded construction allows for flush mounting in metal
2x sensing distance model with a 2mm nominal range (±10%)
High-speed 1.5 kHz response frequency suitable for fast-moving targets
IP67 rating ensures protection against dust and water ingress
Normally Closed (NC / 离开时ON) NPN open-collector output
Wide operating voltage range of 12 to 24 VDC (±10%)
Supplied with an integrated 2m, 3-core oil-resistant rubber cable

Technical Specification Matrix

Parameter	Value
Sensing Type	Inductive
Body Style	Cylindrical, Threaded
Thread Size	M8 x 1
Mounting Type	Shielded (Flush)
Sensing Distance	2 mm ± 10%
Stable Sensing Range	0 to 1.6 mm
Standard Sensing Target	8 x 8 x 1 mm (Iron Plate)
Output Type	NPN Open-Collector
Output Logic	Normally Closed (NC)
Max. Response Frequency	1.5 kHz
Max. Sink Current	100 mA
Residual Voltage	≤ 2.0 V
Power Supply Voltage	12 to 24 VDC ±10% (Ripple P-P 10% or less)
Current Consumption	≤ 10 mA
Protection Rating	IP67 (IEC)
Operating Temperature	-25 to +70 °C
Storage Temperature	-40 to +80 °C
Housing Material	Stainless Steel
Front Cap Material	PBT
Rear Cap Material	PC
Connection	2m, 3-core cable (0.1 mm²)
Indicator	Orange LED (Output ON)

Industrial Applications

1. High-Speed Component Presence Verification in Assembly Machines

In a high-speed automated assembly line for small electronics, the GX-108MKB is flush-mounted into a metal fixture holding a circuit board. Its task is to confirm that a small metal bracket has been correctly placed by a robotic arm before the next assembly step.

Problem Solved

The sensor's compact M8 size and shielded design allow for unobtrusive, flush installation directly into metal tooling, saving space. The 1.5 kHz response frequency is essential for keeping up with the machine's fast cycle time, preventing bottlenecks. The NC output can be used as a failsafe, signaling an error (part absent) only when the output goes high, simplifying control logic.

Component PresenceAutomated AssemblyFlush MountingHigh-Speed DetectionPoka-yokeEnd-of-Arm ToolingNPN Sensor

2. CNC Machine Tool Turret Home Position Sensing

The GX-108MKB is installed on the stationary frame of a CNC lathe's tool turret. It detects a metal flag on the rotating turret to confirm it has returned to the precise 'home' or 'tool 1' position, ensuring accurate and repeatable tool changes.

Problem Solved

The sensor's stainless steel body and IP67 rating withstand the harsh environment of coolant, oil, and metal shavings common in CNC machines. Its high repeat accuracy (≤5% of sensing distance) ensures the turret stops at the exact same position every time, which is critical for machining precision. The shielded design prevents false triggers from surrounding metal structures.

CNC MachiningHome Position SensorTool TurretInductive Proximity SwitchMachine Tool AutomationCoolant ResistantRepeatable Positioning

3. Rotational Speed Monitoring via Gear Tooth Counting

On a conveyor system's drive motor, the GX-108MKB is positioned to detect the passing teeth of a small steel gear mounted on the motor shaft. The PLC counts the pulses from the sensor to calculate the motor's RPM and monitor for under-speed or stalled conditions.

Problem Solved

The 1.5 kHz response frequency is more than adequate for accurately detecting the teeth of a rapidly rotating gear, providing clean and reliable pulses for the PLC's high-speed counter. Its small M8 size allows for installation in tight spaces near the motor shaft. The NC output immediately signals a fault (output low) if the gear stops between teeth, simplifying stall detection logic.

RPM MeasurementGear Tooth SensorSpeed MonitoringTachometerConveyor ControlPulse GenerationRotational Speed