Standard Type Cylindrical Inductive Proximity Sensors with Improved Basic Performance
UL Listed
UL , CE , UKCA Approved
UL : Listing(Excluding small-diameter type)
UL : Recognition(Small-diameter type only. Excluding bendingresistant cable type.)
Features
Response frequency of 5 kHz* allows the use of high-speed application
* In the case of GX-303S
The GX-303S boasts a response frequency of 5 kHz and realizes high speed response.
The response frequency of other sensor models has been also improved by up to 4 times as compared to our conventional models.
Since the GX-300 series responds quickly to sensor ON/OFF judgement, it works well with a high-speed application and contributes to the reduction of equipment cycle time.
What is response frequency?
A rotating plate having the standard sensing object pasted at constant intervals is placed in front of the proximity sensor. The plate is rotated while observing the sensing output. The maximum number of times per second at which sensing can be done, for which the corresponding sensing output can be obtained, is the maximum response frequency.
In other words, the larger the numeric value of the response frequency is, the faster the response is.
Example) Conversion of response frequency to response speed
1 kHz → 1-ms cycle
5 kHz → 0.2-ms cycle
Enhanced a degree of the detection margin
Sensing over long distance
The M8 / M12 / M18 / M30 threaded type sensors are available in standard sensing range type or long sensing range type (“K” at the end of model No.).
The long sensing range means reliable detection with plenty of performance margin to spare.
Minimum risk of collision or sensing error even if the distance to the sensing object changes due to equipment vibration
If the distance to the sensing object changes due to equipment vibration or time-related degradation, the sensor may generate sensing errors including sensing failure in some cases.
If the sensor is set up very close to the sensing object for the purpose of preventing detecting failures, the sensor may contact the sensing object and cause damage.
The long sensing range models facilitate the sensor setup for reliable sensing since they detect the sensing object at a long distance.
Reduced variation in maximum operation distance
With the GX-300 series, variation in maximum operation distance is kept within ±10%
* ±15% in the case of the previous GX series.
Variation in the maximum operation distance of the ø3 / ø4 / ø5.4 mm ø0.118 / ø0.157 / ø0.213 in, M5 / M8 threaded type models has been also reduced as compared to the conventional models.
Indicator with significantly improved visibility
The indicator is conveniently visible from any direction, thus facilitating installation check and operation confirmation.
If the operation indicator position is adjusted to make the indicator visible, the sensor distance changes.
In the small-diameter type sensors, the indicator light is visible at 4 locations. In the M8 and larger threaded type sensors, the high-brightness indicator and the resin containing dispersing agent provide clear and highly visible light to facilitate the cumbersome adjustment of installation position.
* The indicator light may appear differently depending on ambient environments and brightness.
* On the M8 and larger threaded type sensors, the indicator light is visible at 2 locations on one side.
* The operation indicators of the M8 and larger threaded type sensors flash in green during IO-Link communication.
Further reduction of the size of small-diameter type sensors for easier embedment
The small-diameter type sensors are 25.1 mm 0.988 in in depth while the conventional models measured 30 mm 1.181 in.
(GX-303S measures 27.1 mm 1.067 in in depth.)
The reduced unit size enables the installation of the sensor in a smaller space.
【Comparison of depth dimensions of small-diameter type sensors】
| Type | Our conventional model |
GX-300 |
|---|---|---|
| ø3.0mm ø0.118 in |
– | 27.1mm 1.067 in |
| ø3.8mm ø0.150 in |
30mm 1.181 in |
– |
| ø4.0mm ø0.157 in |
– | 25.1mm 0.988 in |
| ø4.4mm ø0.173 in |
30mm 1.181 in |
– |
| ø5.4mm ø0.213 in |
30mm 1.181 in |
25.1mm 0.988 in |
| M5 thread | 30mm 1.181 in Threaded section : 18mm 0.709 in |
25.1mm 0.988 in Threaded section : 15.1mm 0.594 in |
The GX-300 series includes 310 different sensor models.
We offer various types of sensor models such as the cable type (cable length: 2 m 6.562 ft or 5 m 16.404 ft), connector type and pigtailed type. Furthermore, we can supply bending-resistant cable type models (cable length : 2 m 6.562 ft or 5 m 16.404 ft), which are suitable for installation on moving parts.
(For the detail of our model lineup, see page 6 and following pages.)
IO-Link compatibility
Evolution from ON/OFF judgment sensors to sensors capable of transmitting the detection level and sensor status information
* Only the M8 / M12 / M18 / M30 threaded type, PNP output, normally open type models are compatible with IO-Link.
◆ IO-Link compatible sensors can also be used as ordinary sensors (PNP output type).
◆ When IO-Link compatible sensors are connected to the IO-Link master, they can transmit not only ON/OFF signal but also sensor level information and operation mode switching information in both ways. So, the sensors can be utilized for the visualization of manufacturing operations or for the incorporation of IoT technology.
* CC-Link IE Field and CC-Link are trademarks of Mitsubishi Electric Corporation, and are controlled by the CC-Link Partner Association.
DeviceNet and EtherNet/IP are registered trademarks of ODVA (Open DeviceNet Vender Association, Inc.).
EtherCAT is a registered trademark of Beckhoff Automation GmbH.
Modbus is a registered trademark of Schneider Automation, Inc.
Order guide
Model No.
DC 3-wire type (Small-diameter, shielded type)
| Type | Appearance (mm in) |
Sensing range (Note) | Model No. | Output | Output operation | |
|---|---|---|---|---|---|---|
| Max. operation distance |
Stable sensing range |
|||||
| Non-threaded type |
 |
0.8mm 0.031 in |
0 to 0.56mm 0 to 0.022 in |
GX-303S-A-N | NPN open-collector transistor |
Normally open |
| GX-303S-B-N | Normally closed | |||||
| GX-303S-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-303S-B-P | Normally closed | |||||
 |
1.2mm 0.047 in |
0 to 0.84mm 0 to 0.033 in |
GX-304S-A-N | NPN open-collector transistor |
Normally open | |
| GX-304S-B-N | Normally closed | |||||
| GX-304S-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-304S-B-P | Normally closed | |||||
 |
1mm 0.039 in |
0 to 0.7mm 0 to 0.028 in |
GX-305S-A-N | NPN open-collector transistor |
Normally open | |
| GX-305S-B-N | Normally closed | |||||
| GX-305S-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-305S-B-P | Normally closed | |||||
| Threaded type |
 |
1.2mm 0.047 in |
0 to 0.84mm 0 to 0.033 in |
GX-305M-A-N | NPN open-collector transistor |
Normally open |
| GX-305M-B-N | Normally closed | |||||
| GX-305M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-305M-B-P | Normally closed | |||||
Note: The maximum operation distance stands for the maximum distance for which the sensor can detect the standard sensing object.
The stable sensing range stands for the sensing range for which the sensor can stably detect the standard sensing object even if there is an ambient temperature drift and/or supply voltage fluctuation.
DC 3-wire type (Shielded type)
Threaded type
| Type | Appearance (mm in) |
Sensing range (Note 1) | Model No. (Note 2) |
Output | Output operation | |
|---|---|---|---|---|---|---|
| Max. operation distance |
Stable sensing range |
|||||
| Standard sensing range type |
 |
1.5mm 0.059 in |
0 to 1.2mm 0 to 0.047 in |
GX-308M-A-N | NPN open-collector transistor |
Normally open |
| GX-308M-B-N | Normally closed | |||||
| GX-308M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-308M-B-P | Normally closed | |||||
 |
2mm 0.079 in |
0 to 1.6mm 0 to 0.063 in |
GX-312M-A-N | NPN open-collector transistor |
Normally open | |
| GX-312M-B-N | Normally closed | |||||
| GX-312M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-312M-B-P | Normally closed | |||||
 |
5mm 0.197 in |
0 to 4mm 0 to 0.157 in |
GX-318M-A-N | NPN open-collector transistor |
Normally open | |
| GX-318M-B-N | Normally closed | |||||
| GX-318M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-318M-B-P | Normally closed | |||||
 |
10mm 0.394 in |
0 to 8mm 0 to 0.315 in |
GX-330M-A-N | NPN open-collector transistor |
Normally open | |
| GX-330M-B-N | Normally closed | |||||
| GX-330M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-330M-B-P | Normally closed | |||||
| Long sensing range type |
 |
2mm 0.079 in |
0 to 1.6mm 0 to 0.063 in |
GX-308MK-A-N | NPN open-collector transistor |
Normally open |
| GX-308MK-B-N | Normally closed | |||||
| GX-308MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-308MK-B-P | Normally closed | |||||
 |
4mm 0.157 in |
0 to 3.2mm 0 to 0.126 in |
GX-312MK-A-N | NPN open-collector transistor |
Normally open | |
| GX-312MK-B-N | Normally closed | |||||
| GX-312MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-312MK-B-P | Normally closed | |||||
 |
8mm 0.315 in |
0 to 6.4mm 0 to 0.252 in |
GX-318MK-A-N | NPN open-collector transistor |
Normally open | |
| GX-318MK-B-N | Normally closed | |||||
| GX-318MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-318MK-B-P | Normally closed | |||||
 |
15mm 0.591 in |
0 to 12mm 0 to 0.472 in |
GX-330MK-A-N | NPN open-collector transistor |
Normally open | |
| GX-330MK-B-N | Normally closed | |||||
| GX-330MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-330MK-B-P | Normally closed | |||||
Notes:
1) The maximum operation distance stands for the maximum distance for which the sensor can detect the standard sensing object.
The stable sensing range stands for the sensing range for which the sensor can stably detect the standard sensing object even if there is an ambient temperature drift and/or supply voltage fluctuation.
2) The PNP output, normally open type models [GX-3□M(K)-A-P(-□)] are compatible with IO-Link.
The PNP output, normally closed type models and all NPN output type models do not support IO-Link.
DC 3-wire type (Non-shielded type)
Threaded type
| Type | Appearance (mm in) |
Sensing range (Note 1) | Model No. (Note 2) |
Output | Output operation | |
|---|---|---|---|---|---|---|
| Max. operation distance |
Stable sensing range |
|||||
| Standard sensing range type |
 |
1.5mm 0.059 in |
0 to 1.2mm 0 to 0.047 in |
GX-308M-A-N | NPN open-collector transistor |
Normally open |
| GX-308M-B-N | Normally closed | |||||
| GX-308M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-308M-B-P | Normally closed | |||||
 |
2mm 0.079 in |
0 to 1.6mm 0 to 0.063 in |
GX-312M-A-N | NPN open-collector transistor |
Normally open | |
| GX-312M-B-N | Normally closed | |||||
| GX-312M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-312M-B-P | Normally closed | |||||
 |
5mm 0.197 in |
0 to 4mm 0 to 0.157 in |
GX-318M-A-N | NPN open-collector transistor |
Normally open | |
| GX-318M-B-N | Normally closed | |||||
| GX-318M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-318M-B-P | Normally closed | |||||
 |
10mm 0.394 in |
0 to 8mm 0 to 0.315 in |
GX-330M-A-N | NPN open-collector transistor |
Normally open | |
| GX-330M-B-N | Normally closed | |||||
| GX-330M-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-330M-B-P | Normally closed | |||||
| Long sensing range type |
 |
2mm 0.079 in |
0 to 1.6mm 0 to 0.063 in |
GX-308MK-A-N | NPN open-collector transistor |
Normally open |
| GX-308MK-B-N | Normally closed | |||||
| GX-308MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-308MK-B-P | Normally closed | |||||
 |
4mm 0.157 in |
0 to 3.2mm 0 to 0.126 in |
GX-312MK-A-N | NPN open-collector transistor |
Normally open | |
| GX-312MK-B-N | Normally closed | |||||
| GX-312MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-312MK-B-P | Normally closed | |||||
 |
8mm 0.315 in |
0 to 6.4mm 0 to 0.252 in |
GX-318MK-A-N | NPN open-collector transistor |
Normally open | |
| GX-318MK-B-N | Normally closed | |||||
| GX-318MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-318MK-B-P | Normally closed | |||||
 |
15mm 0.591 in |
0 to 12mm 0 to 0.472 in |
GX-330MK-A-N | NPN open-collector transistor |
Normally open | |
| GX-330MK-B-N | Normally closed | |||||
| GX-330MK-A-P | PNP open-collector transistor |
Normally open | ||||
| GX-330MK-B-P | Normally closed | |||||
Notes:
1) The maximum operation distance stands for the maximum distance for which the sensor can detect the standard sensing object.
The stable sensing range stands for the sensing range for which the sensor can stably detect the standard sensing object even if there is an ambient temperature drift and/or supply voltage fluctuation.
2) The PNP output, normally open type models [GX-3□M(K)-A-P(-□)] are compatible with IO-Link.
The PNP output, normally closed type models and all NPN output type models do not support IO-Link.
5 m 16.404 ft cable length type
Threaded type
5 m 16.404 ft cable length type (standard: 2 m 6.562 ft) is also available. When ordering this type, suffix “-C5” to the model No.
(e.g.) 5 m 16.404 ft cable length type of GX-303S-A-N is “GX-303S-A-N-C5”.
Bending-resistant cable type (2 m 6.562 ft / 5 m 16.404 ft cable length)
The shielded, non-threaded type sensors (ø4 mm ø0.157 in / ø5.4 mm ø0.213 in) and threaded type sensors (M5 / M8) are available with a bending-resistant cable (cable length: 2 m 6.562 ft or 5 m 16.404 ft). (Note that the ø5.4 mm ø0.213 in size, normally closed type sensors are not available with a 5-m-long bending-resistant cable.)
When ordering bending-resistant 2 m 6.562 ft cable type, suffix “-R” to the model No. When ordering bending-resistant 5 m 16.404 ft cable type, suffix “-R5” to the model No.
(e.g.) Bending-resistant 2 m 6.562 ft cable type of GX-304S-A-N is “GX-304S-A-N-R”.
(e.g.) Bending-resistant 5 m 16.404 ft cable type of GX-304S-A-N is “GX-304S-A-N-R5”.
Pigtailed type
The threaded type sensors (M8 / M12 / M18 / M30) are available in the pigtailed type. (Connector: M12)
When ordering this type, suffix “-J” to the model No.
(e.g.) Pigtailed type of GX-308M-A-N is “GX-308M-A-N-J”.
Please purchase mating cables separately when using pigtailed type models.
•Mating cable
| Model No. | Description | |
|---|---|---|
| CN-24S-C2 | Length: 2 m 6.562 ft | AWG20 4-core cable with M12 Smartclick connector on one end Cable outside diameter: ø6 mm ø0.236 in |
| CN-24S-C5 | Length: 5 m 16.404 ft | |
Note : is a trademark of OMRON Corporation
Connector type
The threaded type sensors (M12 / M18 / M30) are available in the connector type. When ordering this type, suffix “-Z” to the model No.
(e.g.) Connector type of GX-312M-A-N is “GX-312M-A-N-Z”.
List of connection systems
Please see the list below for the model no. of each model..