CN-EP2 | Connector
Applicable Products | Light Curtains / Safety Components
![Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] SQ4](/ac/e/fasys/sensor/safety/thumbnail/sq4-a21-n.png)
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| Product Number | SQ4-A21-N |
| Part Number | SQ4-A21-N |
| Product name | Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] |
| Details | Sensor [For standard liquid] |
| Series | Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] SQ4 |
![Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] SQ4](/ac/e/fasys/sensor/safety/thumbnail/sq4-a21-p.png)
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| Product Number | SQ4-A21-P |
| Part Number | SQ4-A21-P |
| Product name | Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] |
| Details | Sensor [For standard liquid] |
| Series | Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] SQ4 |
![Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] SQ4](/ac/e/fasys/sensor/safety/thumbnail/sq4-c11.png)
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| Product Number | SQ4-C11 |
| Part Number | SQ4-C11 |
| Product name | Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] |
| Details | Controller |
| Series | Safety Liquid Leak Sensor [Control Category 4 PLe SIL3] SQ4 |