Autonics BYS500-TDT Through-Beam Photoelectric Sensor (500 mm, NPN, DC, Synchronous Detection)
Compact through-beam photoelectric sensor with 500 mm sensing distance and synchronous detection to minimize false detection from ambient light.
Ideal for precision object detection in compact automation and inspection equipment.
The Autonics BYS500-TDT is a miniature through-beam photoelectric sensor designed for high-precision detection in compact installations. Using synchronous detection technology, it significantly reduces malfunction caused by external light sources. With a 500 mm sensing distance, fast ≤1 ms response, and robust DC transistor output, it is ideal for inspection equipment, PCB handling, and small automation machines
Through-beam sensing (Emitter + Receiver)
500 mm sensing distance
Synchronous detection for ambient light immunity
Ultra-compact body (12 × 30 × 16 mm)
Fast response time: ≤ 1 ms
NPN open-collector transistor output
Dark-ON operation
Built-in over-current & short-circuit protection
High vibration & shock resistance
Suitable for dense machine layouts
| Parameter | Specification |
|---|---|
| Model | BYS500-TDT1 (Emitter) / BYS500-TDT2 (Receiver) |
| Series | BY |
| Sensor Type | Photoelectric – Through-Beam |
| Sensing Distance | 500 mm |
| Sensing Target | Opaque materials |
| Min. Detectable Object | ≥ Ø 5 mm |
| Response Time | ≤ 1 ms |
| Light Source | Infrared LED |
| Peak Wavelength | 940 nm |
| Output Type | NPN open collector (Receiver) |
| Supply Voltage | 12–24 V DC ±10% |
| Load Current | ≤ 100 mA |
| Protection Rating | IP50 |
| Operating Temperature | −10 to +60 °C |
Compact automation machines
PCB handling & inspection systems
Small conveyors
Component presence detection
Labeling & packaging equipment
OEM precision machinery
BYS500-TDT1 Emitter × 1
BYS500-TDT2 Receiver × 1
Mounting brackets × 2
M3 bolts & nuts
Instruction manual
Q1. What is the difference between TDT1 and TDT2?
TDT1 is the emitter, and TDT2 is the receiver.
Q2. What does synchronous detection mean?
It synchronizes emitter & receiver signals to reduce interference from ambient light.
Q3. What is the sensing distance?
Up to 500 mm.
Q4. What output type does this sensor use?
NPN open-collector transistor output.
Q5. Is it suitable for compact machines?
Yes, its ultra-small size makes it ideal for tight spaces.
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