If youβre not fully sure about PSN40-20DN, taking a closer look at Autonics Photoelectric Sensor, Contrinex Proximity Sensor and Autonics Prd12 4Dp often helps compare reliability, cost, and availability.
Autonics PSN40-20DN 20 mm Proximity Sensor
PSN40-20DN is an Autonics 20 mm Proximity Sensor with 20mm sensing distance and NPN normally open output configuration design. Manufactured by Autonics, this sensor is part of Autonics Proximity Sensors within the PS Series, supporting DC 3-wire 12β24VDC, frame size 40mm, IP67 protection, front sensing type, and 100Hz response frequency.

| Brand | Autonics |
| Product Type | Proximity Sensor |
| Model Number | PSN40-20DN |
Autonics PSN40-20DN 20 mm Proximity Sensor β Technical Specifications
| Specification | Value |
|---|---|
| Sensing distance | 20mm |
| Hysteresis(distance) | Max. 10% of sensing distance |
| Standard sensing target | 60Γ60Γ1mm(iron) |
| Current specification | Current consumption: Max. 10mA |
| Control output | NPN Normally Open |
| Wire type and power | DC 3-wire type 12-24VDC |
| Sensing side size | Frame size 40mm |
| Sensing type | Standard type(front sensing type) |
| Environment_Ambient temperature | -25 to 70β, storage: -30 to 80β |
| Environment_Ambient humidity | 35 to 95% RH, storage: 35 to 95% RH |
| Protection structure | IP67 |
| Material | Heat-resistant ABS |
| Response frequency | 100Hz |
| Weight | β 135g (β225g) |
The PSN40-20DN Autonics 20 mm Proximity Sensor is used for reliable object detection in industrial automation systems. This model operates with a 20mm sensing distance, NPN normally open output, and DC 3-wire 12β24VDC power supply. As part of the PS Series, PSN40-20DN supports consistent sensing performance in standard automation environments.
In industrial applications, the PSN40-20DN Autonics 20 mm Proximity Sensor is applied in conveyors, packaging machinery, automated assembly lines, and material handling systems. Its front sensing design enables dependable detection of targets, while the stable NPN output allows accurate signal input to PLCs. The defined response frequency supports reliable operation in routine automation processes.
The PSN40-20DN provides dependable proximity detection with clear electrical behavior and environmental resistance. With IP67 protection, defined frame size, and stable DC wiring, it meets common industrial operating conditions. This Autonics 20 mm Proximity Sensor from the PS Series remains suitable for engineers seeking consistent detection and long-term reliability in industrial automation applications.




