Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Model Number	D203S
Sensor Type	Pyroelectric Infrared (PIR)
Detection Angle	140 degrees
Operating Voltage	DC 4.5V - 20V
Lens Color	Black
Output Signal	High/Low Level Switching
Delay Time	Adjustable via potentiometer
Sensitivity	Adjustable
Package Weight	15 grams
Application	Automatic lighting, security alarms, toy control

6 reviews

Anonymous

Mar 21, 2026

Rating: 5/5

Reliable and affordable

Bought five of these for different rooms. All of them are functioning perfectly. The induction switch is very responsive to movement.

Anonymous

Mar 18, 2026

Rating: 4/5

Solid performance

Works well for a simple motion detector setup. The angle is wide enough to cover a standard doorway. Just ensure you provide stable voltage.

Anonymous

Mar 13, 2026

Rating: 5/5

Exceeded expectations

Very happy with this purchase. The black lens blends in nicely with my custom enclosure. Fast shipping and the product arrived in perfect condition.

Anonymous

Mar 12, 2026

Rating: 4/5

Good sensitivity, needs calibration

Great sensor overall. I had to spend a few minutes adjusting the potentiometers to get the delay time right for my hallway light, but once set, it works flawlessly.

Anonymous

Mar 11, 2026

Rating: 5/5

Perfect for my Arduino project

This D203S module worked exactly as expected. The detection range is impressive and the black lens looks sleek. Easy to wire up with standard jumper cables.

Anonymous

Mar 05, 2026

Rating: 5/5

Great for learning electronics

Used this for a university prototype. The documentation online combined with this hardware made the integration smooth. Highly recommend for beginners.

5 FAQ

Q: What is the maximum distance this module can detect?

A: Under ideal conditions, the detection range is approximately 5 to 7 meters, depending on the ambient temperature and the size of the moving object.

Q: How do I adjust the sensitivity?

A: There is a small potentiometer labeled 'S' on the board. Turn it clockwise to increase sensitivity and counter-clockwise to decrease it. Use a small screwdriver for adjustment.

Q: Can this sensor detect motion through glass?

A: No, standard PIR sensors like the D203S cannot detect infrared radiation through glass effectively. It requires a direct line of sight or an open window.

Q: Is this compatible with Raspberry Pi GPIO pins?

A: Yes, it is compatible. However, ensure you connect the VCC to a 5V pin and use a logic level converter if necessary for the signal pin, though many users report direct 3.3V compatibility works for basic tests.

Q: Does this come with mounting screws?

A: The module typically comes with pre-drilled holes for mounting, but screws are not included in the package. Standard M2 or M3 screws fit well.

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