Description
The SICK WTR1-P421S02 is a multitask photoelectric sensor with integrated pneumatic valve control, designed for accumulation and release control in conveyor systems. It combines photoelectric background suppression sensing with on-board pneumatic actuation to manage single accumulation and block or slug release functions. This device operates on a 21.6–27.6 V DC supply and is intended for industrial material handling applications.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
SICK |
| Category |
Industrial Automation |
| Part Number |
WTR1-P421S02 |
| Subcategory |
Multitask Photoelectric Sensors |
| Device Type |
Photoelectric sensor with integrated pneumatic valve |
| Functional Principle |
Photoelectric proximity sensor, background suppression |
| Application |
Conveyor ZoneControl and accumulation |
| Sensing Range |
300–900 mm |
| Light Type |
Infrared |
| Light Source |
LED |
| Supply Voltage |
21.6–27.6 V DC |
| Power Consumption |
Approx. 25 mA |
| Switching Output |
PNP |
| Switching Mode |
Dark switching |
| Output Current Max. |
≤ 100 mA |
| Switching Frequency |
250 Hz |
| Connection Type |
M12 male connector, 4-pin |
| Daisy Chain Cable |
M12 female connector, 1.2 m |
| Integrated Valve Type |
3/2-way solenoid valve |
| Valve Medium |
Compressed air or neutral gases |
| Operating Pressure Range |
4–7 bar |
| Housing Material |
Plastic, ABS |
| Enclosure Rating |
IP54 |
| Operating Temperature |
-15 °C to +50 °C |
| Weight |
175 g |
Information About WTR1-P421S02
The WTR1-P421S02 is part of SICK’s WTR series, developed for ZoneControl and conveyor automation systems where precise product flow management is required. It integrates a photoelectric proximity sensor with background suppression and a 3/2-way solenoid valve for air-to-brake operation. The device supports sensing ranges from 300 mm to 900 mm using infrared LED technology and includes potentiometer-based adjustment for fine tuning. Its compact housing, daisy-chain connectivity, and pneumatic interface make it suitable for modular conveyor layouts in demanding industrial environments.
Key Features:
- Multitask Photoelectric Sensor: Combines optical sensing and pneumatic control in one device.
- Integrated Pneumatic Valve: On-board air-to-brake solenoid valve for conveyor accumulation control.
- Background Suppression Sensing: Reliable object detection independent of background surfaces.
- Single Accumulation Logic: Supports single accumulation with single and block (slug) release modes.
- Infrared LED Light Source: Ensures stable detection over extended sensing distances.
- Adjustable Sensing Range: 300–900 mm with potentiometer-based sensitivity adjustment.
- PNP Switching Output: Compatible with standard industrial PLC and control systems.
- Daisy Chain Capability: Includes 1.2 m M12 cable for simplified system wiring.
- ZoneControl Application Ready: Optimized for conveyor and material handling automation.
The WTR1-P421S02 delivers the reliability and precision required for integrated sensing and pneumatic control in industrial conveyor accumulation systems.
