# Optical sensor, TCST2103

> Optical sensor TCST2103, photoelectric, with IR emitter and phototransistor, for detecting the presence of objects in a slot. Can be used as an optical switch, counter or encoder. Slot width 3.1 mm, ambient light filter, wavelength 950 nm, response time 10 ms, If current 60 mA, collector current Ic 4 mA, no amplification.

- Page: https://sigmanortec.ro/en/optical-sensor-tcst2103
- Price: 4.56 RON
- Availability: In stock; 1-2 zile
- Reference: 9162 · EAN: 5944759324183
- Category: Mechatronics and IoT > Sensors and Modules > Light and Optical Sensors
- Package (shipping data): 0.001 kg
- Updated: 2026-09-23
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:26 (Europe/Bucharest)

## Description

Photoelectric sensor with IR emitter and phototransistor, ideal for detecting the presence of objects in the slot, suitable as an optical switch, counter or encoder. It has an aperture of 3.1 mm, ambient light filter, wavelength 950 nm and response time of 10 ms, with If 60 mA and collector current 4 mA.
Photoelectric sensor that uses an infrared emitting diode and a phototransistor to detect the presence of an object between them.
It can be used as a counter, optical switch or encoder.
Specifications:
Model: TCST 2103
Distance between diodes: 3.1mm
Collector current Ic: 4mA
Current If: 60mA
Ambient light filter: Yes
Emitter wavelength: 950nm
Response time: 10ms
No amplification
Technical sheet available in Associated Files.