Laser Photoelectric Sensors with Built-in Amplifier
Caution
Product Description
[Features]
• Smaller spot diameter supports small workpiece detection.
• Built-in amplifier laser sensor with NPN open collector output.
• Response time is 250μs or less for detection timing checks.
[Use]
• Suitable for small workpiece detection and high repeat-precision applications.
Laser photoelectric sensors with built-in amplifier
These laser photoelectric sensors have a smaller spot diameter than standard photoelectric sensors, which suits detection of small workpieces. Choose the sensing method first: through-beam (MZL-T), retro-reflective (MZL-R) or diffuse-reflective (MZL-D).
- Through-beam: long sensing distance, less affected by dust thanks to strong light level; detects opaque objects regardless of shape, color or material.
- Retro-reflective: less wiring than through-beam, and the reflector can be placed where space is limited.
Types and components
*1. Tightening torque 0.5 N·m or less. MZL-T (through-beam)
*1. Tightening torque 0.5 N·m or less. MZL-R (retroreflective (mirror))
| Part number | Accessories | Mounting bracket Single-item part number (sold separately) | ||
|---|---|---|---|---|
| 1 mounting bracket (material: SUS304) 2 pan head screws with washers (M3×10) | Reflector | |||
| Without alteration NB | With alteration NB | |||
| MZL-T (through-beam) | Not included | 2 sets included | Not included | BFSR |
| MZL-R (retroreflective (mirror)) | 1 set included | 1 pc. included | ||
| MZL-D | 1 set included | Not included | ||
- The lead cable is not a flexible (moving) cable.
The mounting bracket alone is available under part number BFSR.
- The reflector is not sold separately as a standard part.
Part numbers and dimensions
Ordering example
| Type |
|---|
| MZL-T |
| Type | Sensing method | Shape | Sensing distance | Output type | Emitter light source | Emitting element | Connection method |
|---|---|---|---|---|---|---|---|
| MZL-T | Through-beam | 30m | NPN output | Class 1 Laser | Laser diode (red) | Cord 2 m | |
| MZL-R | Retroreflective (mirror) | 200mm–10m | Class 2 Laser | ||||
| MZL-D | Diffuse reflective | 30mm–400mm | Class 2 Laser |
- For through-beam types, the emitter is marked "MZL-T-L" and the receiver "MZL-T-D".
Sensor adjustment (when a diffuse reflective sensor may detect the workpiece background)
| Type | Order | Output indicator | Adjustment method |
|---|---|---|---|
| Reflective | ① | On (orange) | Place the object at the detection position and gradually turn the sensitivity potentiometer up from MIN. The position where the output indicator lights is A. |
| ② | Off | Remove the object and gradually turn the sensitivity potentiometer down from MAX. The position where the output indicator turns off is B. | |
| ③ | On (orange) | Position C, midway between A and B, is the optimal sensitivity position. A and B may be reversed depending on the model and conditions. Place the workpiece in position and check operation. |
Specifications
| Type | Through-beam | Retroreflective (mirror) | Diffuse reflective | |
|---|---|---|---|---|
| Type | MZL-T | MZL-R | MZL-D | |
| Sensing distance | 30m | 0.2–10m *1 | 30mm–400mm *2 | |
| Light source | Red semiconductor laser, Class 1*3 Wavelength: 650 nm, max. output: 390 μW | Red semiconductor laser, Class 2*3 Wavelength: 650 nm, max. output: 3 mW | ||
| Spot diameter (at focal distance)*4 | Approx. dia. 2 mm Distance 2 m (at room temperature) | Approx. dia. 2.5 mm Distance 2 m (at room temperature) | Approx. dia. 2 mm Distance 400 mm (at room temperature) | |
| Response time | 250 μs or less | |||
| Differential distance | - | 20% | ||
| Sensitivity adjustment | Single-turn potentiometer | |||
| Indicator | Output indicator: orange LED; laser emission indicator: green LED (stability indicator on through-beam receivers) | |||
| Control output | NPN open collector, max. 100 mA / DC 30 V | |||
| Output mode | Light ON / Dark ON switch selectable | |||
| Connection type | Cord type: cable length 2 m, dia. 3.8 mm | |||
| Rating | Supply voltage | DC 10 to 30 V, ripple (p-p) 10% included | ||
| Current consumption | Emitter: 15 mA or less | 20 mA or less | ||
| Receiver: 15 mA or less | ||||
| Noise resistance | IEC standard | CE compliant | ||
| Environmental resistance | Ambient temperature / humidity | -10 to +50°C (no freezing) / 35 to 85% RH (no condensation) | ||
| Ambient illuminance | Sunlight: 10,000 lx, incandescent lamp: 3,000 lx | |||
| Vibration resistance | 10 to 55 Hz, 1.5 mm double amplitude, X, Y, Z, 2 hours each | |||
| Shock resistance | Approx. 50 G (500 m/s²), X, Y, Z, 3 times each | |||
| Protection | IP67 | |||
| Material | Case: ABS (glass fiber reinforced), front cover: PMMA | |||
| Mass (incl. cord) | Emitter: 45 g, receiver: 55 g | Approx. 55 g | ||
*1 With the supplied reflector. *2 With 100×100 white paper. *3 Class II under US FDA standards.
Sensing methods and features
| Type | Features | |
|---|---|---|
| Detection method | shape | |
| Through-beam | The emitter and receiver are used as a set; the output switches ON/OFF when the beam between them is interrupted. Long sensing distance High light intensity, so less affected by dust. High detection position accuracy Detects any opaque object regardless of shape, color or material. | |
| Retroreflective (mirror) | The sensor and reflector are used as a set; the output switches ON/OFF when the beam between them is interrupted. Half the wiring work of through-beam types. One side is a reflector, so it can be mounted in narrow spaces. Easy optical axis alignment. Detects any opaque object regardless of shape, color or material. | |
| Diffuse reflective | Light from the emitter hits the object and returns to the receiver to switch ON/OFF. Emitter and receiver are integrated, so it needs little installation space. Only the sensor body is mounted, so it takes little space. No optical axis alignment needed. | |
Alterations
Alterations such as a supplied sensor mounting bracket (NB) are available. The bracket is SUS304 and comes with 2 pan-head machine screws with washers (M3×10); MZL-T is supplied with 2 brackets.
Technical reference
Precautions for use
- Mutual interference: sensors installed side by side may be affected by light from each other and become unstable. Prevent this as follows.
Keep enough distance to avoid interference, referring to the interference area characteristics.
For through-beam and retroreflective (mirror) types, mount them alternately.
- Ambient light and interference: high-frequency fluorescent lights or sunlight entering the front of the receiver directly may cause malfunction.
In this case, change the mounting angle or install a light shield to prevent ambient light interference.
- Other notes
When using a switching regulator as the power supply, always ground the frame ground terminal.
Avoid use during the transient state at power-on (about 100 ms).
Do not route wiring in parallel with or in the same conduit as high-voltage or power lines; induction can cause malfunction.
Warning
Do not look directly into the laser or point it at anyone's eyes.
This may harm the eyes or health.
Laser label: this product emits a visible laser beam and corresponds to CLASS 1/CLASS 2 of the JIS/IEC laser safety standard. Warning and explanation labels for CLASS 1/CLASS 2 are attached to the side of the sensor.
- This product has not been registered with the US FDA and cannot be exported to the US.
MZL-T (through-beam)
MZL-R (retroreflective (mirror))
MZL-D (diffuse reflective)
Laser sensor features
- Small spot
Ideal for applications that require detection of tiny objects or high repeatability.
- Achieves a top-class response time of 250 μs among laser sensors for high-speed lines.
- Mounting pitch 25.4 mm, the industry standard for photoelectric sensors with built-in amplifiers.