Q1: What is a 24GHz mmWave human presence sensor?

A1: It is a radar-based sensor that uses millimeter-wave signals to detect human presence, including very slight movements like breathing, even when a person is sitting still.

Q2: How is it different from PIR motion sensors?

A2: Unlike PIR sensors that only detect motion, mmWave sensors can detect both moving and stationary humans, providing more accurate and continuous presence detection.

Q3: Does it require a hub or gateway?

A3: No, this device connects directly to WiFi (2.4GHz) and works with Tuya Smart or Smart Life app.

Q4: Can it detect someone who is not moving?

A4: Yes, mmWave technology can detect micro-movements such as breathing, making it ideal for scenarios like sleeping or working at a desk.

Q5: What is the detection range?

A5: Typically, 24GHz mmWave sensors can detect presence within 3–10 meters depending on installation and environment.

Q6: Does it work through walls or glass?

A6: Yes, mmWave signals can penetrate non-metal materials such as glass, plastic, and drywall, ensuring reliable detection.

Q7: Is it safe for human use?

A7: Yes, the sensor uses low-power electromagnetic waves and is completely safe, with no camera or privacy concerns.

Q8: Can it be used for smart home automation?

A8: Yes, it can trigger lights, air conditioning, alarms, and other smart devices based on human presence.

Q9: Does it support voice assistants?

A9: Yes, when connected via Tuya ecosystem, it supports Alexa and Google Assistant integration.

Q10: How is it powered?

A10: It uses a 5V USB power supply, making installation simple and flexible.

Q11: Where can this sensor be installed?

A11: It supports surface mounting and can be installed on ceilings, walls, or desktops for optimal coverage.

Q12: Will it be affected by lighting or temperature?

A12: No, mmWave sensors work reliably in darkness, strong light, smoke, or temperature changes.