The BOS 21M-PA-ID10-S4 is a diffuse photoelectric sensor with PNP output, providing both normally open and normally closed switching via pins 4-2. It detects objects up to a rated operating distance of 2000mm and operates from a 10-30 VDC supply, with an M12x1 four-pin male connector for field wiring. Housed in powder-coated aluminium with a zinc die-cast body and a PMMA sensing surface, it carries an IP67 rating for use in demanding industrial environments, and mounts via M4 screw fixing.
Key specifications
| IP Rating | IP67 |
| Compliance/Certifications | CE UKCA cULus WEEE / IEC 60947-5-2 |
| Material: Housing / Grip | Powder-coated Aluminium / Zinc die-casting |
| Material: Sensing Surface / Contacts | PMMA |
| Connection Type | M12x1 / Male / 4-pin |
| Rated Operating Distance (mm) | 2000mm |
| Switching Output | PNP normally closed (NC) PNP normally open (NO) Pins 4-2 |
| Switching Frequency (Hz) | 500 Hz |
| Rated Insulation Voltage | 75 VDC |
| Operating Voltage | 10 - 30 VDC |
| Rated Voltage | 24 V |
| Mounting Type | Screw M4 |
| Rated Operating Current | 100 mA |