PANASONIC GX-303S — Flush Cylindrical Inductive Sensors
Panasonic GX-303S: Inductive proximity sensor, ø3.0 mm, flush; Sn 0.8 mm, NPN/PNP output, 2 m cable.
Status: In production
Brand: Panasonic
Product: Inductive proximity sensor, ø3.0 mm, flush
Max. operation distance (Sn): 0.8 mm
Output: NPN or PNP, NO or NC
Connection: 2 m cable
Supply voltage: 10–30 V DC
Protection: IP67
Panasonic GX-303S is a small-diameter, flush-mountable inductive proximity sensor from the GX-300 series. The ø3.0 mm non-threaded cylindrical housing is made of stainless steel (SUS303), the sensing face of heat-resistant ABS, and the body is 27.1 mm long. The maximum operation distance (Sn) is 0.8 mm ±10 % and the stable sensing range is 0 to 0.56 mm, referenced to an iron sheet of 3 × 3 × t 1 mm. The response frequency is 5 kHz and the hysteresis is 15 % or less of the operation distance.
GX-303S runs on 10 to 30 V DC and draws 10 mA or less. The NPN (-N) or PNP (-P) open-collector output handles up to 50 mA, with a residual voltage of 2 V or less and short-circuit protection. Normally open (-A) and closed (-B) versions exist; set-screw mounting torque is 0.2 N·m or less. The standard 2 m cable is 3-core, 0.09 mm², ø2.4 mm, with -C5 suffix cable options. Protection is IP67, operating temperature -25 to +70 °C and net weight about 20 g.
Panasonic GX-303S technical specifications
| General | |
|---|---|
| Type | Small-diameter, shielded, standard sensing range, GX-300 series |
| Housing | ø3.0 mm non-threaded cylindrical, 27.1 mm long |
| Regulations and certifications | CE marking (EMC and RoHS directives), UKCA marking (EMC and RoHS regulations), UL Recognition (excluding bending-resistant cable types) |
| Detection | |
| Max. operation distance (Sn) | 0.8 mm ±10 % |
| Stable sensing range (Sa) | 0 to 0.56 mm |
| Standard sensing object | Iron sheet 3 × 3 × t 1 mm |
| Hysteresis | 15 % or less of operation distance |
| Response frequency | 5 kHz (average value) |
| Temperature characteristics | Within ±15 % of sensing range at +23 °C over the ambient temperature range |
| Voltage characteristics | Within ±2.5 % for ±15 % fluctuation of the rated supply voltage |
| Electrical characteristics | |
| Supply voltage | 10 to 30 V DC (including 10 % ripple p-p) |
| Current consumption | 10 mA or less |
| Short-circuit protection | Incorporated |
| Outputs and indicators | |
| Output type | NPN open-collector transistor (-N) or PNP open-collector transistor (-P) |
| Maximum output current | 50 mA or less; applied voltage 30 V DC or less; residual voltage 2 V or less (with 2 m cable) |
| Output operation | Normally open, NO (-A) or normally closed, NC (-B) |
| Operation indicator | Orange LED (lights up when the output is ON) |
| Environmental | |
| Protection | IP67 (IEC) |
| Ambient temperature | -25 to +70 °C (no condensation or icing); storage -25 to +70 °C |
| Ambient humidity | 35 to 95 % RH (also in storage, no condensation) |
| Vibration resistance | 10 to 55 Hz, 1.5 mm double amplitude in X, Y and Z directions for two hours each |
| Shock resistance | 500 m/s² in X, Y and Z directions ten times each |
| Voltage withstandability | 500 V AC for 1 min between all supply terminals and enclosure |
| Insulation resistance | 50 MΩ or more (500 V DC megger) |
| Mechanical and connection | |
| Material | Enclosure: stainless steel (SUS303); sensing part: heat-resistant ABS; cable: PVC |
| Cable | 0.09 mm², 3-core, ø2.4 mm cabtyre cable, 2 m |
| Net weight | Approx. 20 g (with 2 m cable) |
| Cable bending radius | 7 mm or more |
| Tightening torque | 0.2 N·m or less (set-screw mounting) |
Key features
- ø3.0 mm non-threaded cylindrical stainless steel (SUS303) housing, 27.1 mm long
- 5 kHz response frequency
- Variation of the maximum operation distance kept within ±10 %
- Indicator visible from 4 locations
- NPN or PNP output, normally open or normally closed
GX-303S ordering codes
| Part number | Description |
|---|---|
| GX-303S-A-N | NPN output, NO, 2 m cable |
| GX-303S-B-N | NPN output, NC, 2 m cable |
| GX-303S-A-P | PNP output, NO, 2 m cable |
| GX-303S-B-P | PNP output, NC, 2 m cable |
| GX-303S-A-N-C5 | NPN output, NO, 5 m cable |
| GX-303S-A-P-C5 | PNP output, NO, 5 m cable |
Other Panasonic Flush Cylindrical Inductive Sensors
- PANASONIC GX-304S — Inductive proximity sensor, ø4.0 mm, flush
- PANASONIC GX-305S — Inductive proximity sensor, ø5.4 mm, flush
- PANASONIC GX-305M — Inductive proximity sensor, M5, flush
- PANASONIC GX-308M — Inductive proximity sensor, M8, flush, standard sensing range
- PANASONIC GX-312M — Inductive proximity sensor, M12, flush, standard sensing range
- PANASONIC GX-318M — Inductive proximity sensor, M18, flush, standard sensing range
- PANASONIC GX-330M — Inductive proximity sensor, M30, flush, standard sensing range
- PANASONIC GX-308MK — Inductive proximity sensor, M8, flush, long sensing range
- PANASONIC GX-312MK — Inductive proximity sensor, M12, flush, long sensing range
- PANASONIC GX-318MK — Inductive proximity sensor, M18, flush, long sensing range
- PANASONIC GX-330MK — Inductive proximity sensor, M30, flush, long sensing range
Models from other brands: Flush Cylindrical Inductive Sensors
Is this inductive sensor right for your application?
Share the metal target to be detected (material, size), the required sensing distance, the mounting type (flush / non-flush), ambient conditions (oil, coolant, washdown, temperature) and your PLC input (PNP/NPN, NO/NC); let’s select the right inductive sensor and connection cable together.
All product specifications are subject to change without notice. Source: Panasonic, GX-300 series page (order guide, specifications, cautions for use) and GX-303S-A-N, GX-303S-A-P Spec Detail tables: https://industry.panasonic.com/global/en/products/fasys/sensor/proximity/gx-300, https://industry.panasonic.com/global/en/products/fasys/sensor/proximity/number/GX-303S-A-N, https://industry.panasonic.com/global/en/products/fasys/sensor/proximity/number/GX-303S-A-P (accessed 28 September 2026).