Attributes

Brand	-
Category	Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals
Origin	-
Operating Voltage	3.3V - 5V DC
Output Signal	Digital High/Low
Pin Configuration	3-Pin Header
PCB Dimensions	32mm x 14mm
Mounting Hole Size	3mm Diameter
Sensor Mechanism	Spring-based Switch
Indicator Light	Red LED Trigger
Compatibility	Arduino, ESP8266, ESP32
Item Weight	2.5 grams
Package Contents	1 x KY-031 Module

5 reviews

Anonymous

Mar 22, 2026

Rating: 4/5

Good value

Cheap and effective. LED helps with debugging signals.

Anonymous

Mar 15, 2026

Rating: 5/5

Reliable

No false triggers noticed during testing. Happy with purchase.

Anonymous

Feb 23, 2026

Rating: 5/5

Perfect for beginners

Very easy to integrate into my security project.

Anonymous

Feb 19, 2026

Rating: 4/5

Works well

Sensitive enough for most applications. Good build quality.

Anonymous

Feb 05, 2026

Rating: 5/5

Great sensor

Used it for a vibration alarm. Works exactly as described.

5 FAQ

Q: Can I connect this directly to a GPIO?

A: Yes, ensure your GPIO voltage matches the module operating voltage.

Q: Does this support analog output?

A: No, this module provides a digital high/low signal only.

Q: What is the current consumption?

A: Typical standby current is very low, around a few microamps.

Q: Is there a datasheet available?

A: This is a standard KY series module, diagrams are widely available online.

Q: How do I mount this?

A: You can use the two mounting holes with M3 screws or solder headers.

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