The M3, M4, M5, and M6 series are ultra-miniature laser through-beam sensors engineered for high-precision detection in space-constrained installations. Operating on the classic through-beam principle with separate transmitter and receiver units, these sensors utilize a 650 nm red visible laser source. They achieve an impressive 20 meter sensing range while maintaining an exceptionally small spot size (Standard 1.5 mm, customizable down to 0.3 mm for some models), enabling precise long-range detection. Constructed with stainless steel housing and featuring an IP55 protection rating, they guarantee reliable performance in harsh industrial environments. Their ultra-compact threaded body design (M3/M4/M5/M6) makes them the ideal solution for automation applications where space is at a premium.
This series operates on the through-beam photoelectric sensing principle. The transmitter emits a modulated, collimated red laser beam. The photodetector inside the receiver is specifically tuned to detect this unique light signal. When an object passes between the transmitter and receiver, interrupting the laser beam, the receiver's output state changes, generating a switch control signal. This principle makes the sensor highly immune to the target's color, material, or surface reflectivity, ensuring extremely stable and reliable detection.
| Parameter | M3×20 Model | M4×20 Model | M4×18-TZ Model | M5×24 Model | M6×26 Model | M6×20-TZ Model |
|---|---|---|---|---|---|---|
| Thread Size | M3×0.5 | M4×0.7 | M4×0.7 | M5×0.8 | M6×1.0 | M6×1.0 |
| Sensing Distance | 20 m | 20 m | 20 m | 20 m | 20 m | 20 m |
| Standard Target | 100×100 mm White Paper | 100×100 mm White Paper | 100×100 mm White Paper | 100×100 mm White Paper | 100×100 mm White Paper | 100×100 mm White Paper |
| Light Source | 650 nm Red Laser | 650 nm Red Laser | 650 nm Red Laser | 650 nm Red Laser | 650 nm Red Laser | 650 nm Red Laser |
| Spot Size (at 2 m) | ~Φ5 mm | ~Φ5 mm (Customizable) | ~Φ1.5 mm (Customizable) | ~Φ1.5 mm (Customizable) | ~Φ1.5 mm | ~Φ1.5 mm (Customizable) |
| Housing Material | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel | Stainless Steel |
| Output Configuration | NPN/PNP NO/NC | NPN/PNP NO/NC | NPN/PNP NO/NC | NPN/PNP NO/NC | NPN/PNP NO/NC | NPN/PNP NO/NC |
| Operating Voltage | 10–30 V DC | 10–30 V DC | 10–30 V DC | 10–30 V DC | 10–30 V DC | 10–30 V DC |
| No-load Current | <10 mA | <10 mA | <10 mA | <10 mA | <10 mA | <10 mA |
| Max. Load Current | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA | 150 mA |
| Leakage Current | <0.01 mA | <0.01 mA | <0.01 mA | <0.01 mA | <0.01 mA | <0.01 mA |
| Voltage Drop | <1.5 V | <1.5 V | <1.5 V | <1.5 V | <1.5 V | <1.5 V |
| Switching Frequency | 100 Hz | 100 Hz | 100 Hz | 100 Hz | 100 Hz | 100 Hz |
| Response Time | 5 ms | 5 ms | 5 ms | 5 ms | 5 ms | 5 ms |
| Switching Hysteresis | <15% Sr | <15% Sr | <15% Sr | <15% Sr | <15% Sr | <15% Sr |
| Repeat Accuracy | <5% Sr | <5% Sr | <5% Sr | <5% Sr | <5% Sr | <5% Sr |
| Protection Rating | IP55 | IP55 | IP55 | IP55 | IP55 | IP55 |
| Operating Temperature | 0 °C ~ +55 °C | 0 °C ~ +55 °C | 0 °C ~ +55 °C | 0 °C ~ +55 °C | 0 °C ~ +55 °C | 0 °C ~ +55 °C |
| Short-Circuit Protection | Yes | Yes | Yes | Yes | Yes | Yes |
| Overcurrent Protection | 180 mA | 180 mA | 180 mA | 180 mA | 180 mA | 180 mA |
| Connection | Φ3.0 mm PVC Cable | Φ3.0 mm PVC Cable | Φ3.0 mm PVC Cable | Φ3.0 mm PVC Cable | Φ3.0 mm PVC Cable | Φ3.0 mm PVC Cable |
| Cable Specification | 3×0.15 mm² | 3×0.15 mm² | 3×0.15 mm² | 3×0.15 mm² | 3×0.15 mm² | 3×0.15 mm² |
| Front-end Connection | Tx: 2-core wire Rx: Fiber optic | Tx: 2-core wire Rx: Fiber optic | Tx: 2-core wire Rx: Fiber optic | Tx: 2-core wire Rx: Fiber optic | Tx: 2-core wire Rx: Fiber optic | Tx: 2-core wire Rx: Fiber optic |
| LED Indicator | Tx: Green Rx: Yellow | Tx: Green Rx: Yellow | Tx: Green Rx: Yellow | Tx: Green Rx: Yellow | Tx: Green Rx: Yellow | Tx: Green Rx: Yellow |
| Certification | CE, RoHS | CE, RoHS | CE, RoHS | CE, RoHS | CE, RoHS | CE, RoHS |