Wi-Fi presence sensor PNI HS402

Product detailed description

The PNI HS402 Wi-Fi presence sensor is commonly used in residential and commercial buildings to monitor occupancy and movement. It is suitable for integration into smart home systems, security setups, and automated lighting control. Installers typically use this device in areas such as living rooms, hallways, offices, and outdoor spaces where motion and presence detection are required. The sensor is designed for use in environments where reliable and accurate detection is essential, particularly in settings with high foot traffic or where energy efficiency is a priority.

With its mm-wave radar technology, the sensor provides consistent performance in varying lighting and environmental conditions. It is ideal for use in both indoor and semi-outdoor applications, where traditional PIR sensors may not offer sufficient reliability. The device is often installed in conjunction with smart switches, lighting systems, or security platforms to enable automated responses based on occupancy. Its compact design and USB-C power input make it suitable for installations where space and power flexibility are important factors.

Technical parameters

The PNI HS402 has a detection range of up to 10 m and a 120° detection angle, making it suitable for wide coverage areas. The sensor can detect both movement and static presence, which is useful in scenarios where continuous occupancy monitoring is required. The 0–2500 lux light measurement range allows for integration with lighting control systems that adjust brightness based on ambient conditions. The 5V DC/1A power requirement ensures compatibility with standard USB-C power sources, simplifying installation in various environments.

Installation and connection

Installation of the PNI HS402 involves securing the sensor to a suitable surface using the included double-sided adhesive tape. The device should be mounted at a height and angle that ensures optimal coverage of the intended area. The USB-C power input allows for flexible power solutions, including direct connection to a power bank or wall adapter. When connecting the device to a Wi-Fi network, ensure that the 2.4 GHz frequency is supported and that the signal strength is adequate for reliable communication.

Common installation mistakes include incorrect mounting angles that limit the sensor’s field of view, or placing the device near reflective surfaces that may interfere with radar detection. It is also important to ensure that the power supply is stable and that the device is not exposed to extreme environmental conditions that could affect performance. After installation, verify that the sensor is correctly paired with the Tuya app and that all detection functions are operating as expected.

Compatibility and accessories

The PNI HS402 is compatible with the Tuya app, allowing for remote monitoring and control via smartphone or tablet. It can be integrated into smart home systems that support Tuya-compatible devices, enabling automated responses such as turning on lights or activating alarms based on occupancy. The sensor is designed to work with standard USB-C power supplies and does not require additional hardware for basic operation. The included adhesive tape and USB-C cable simplify installation, while the 230V to 5V/1A power adapter ensures a stable power source for long-term use.

Technical background for designers

The PNI HS402 uses mm-wave radar technology to detect movement and static presence. This technology operates at a frequency of 5.8 GHz and provides high accuracy in detecting objects within the 10 m range. The sensor’s ability to measure ambient light levels allows for integration with lighting control systems that adjust brightness based on environmental conditions. The device is constructed with a durable and compact design, making it suitable for both indoor and semi-outdoor applications. The use of a 120° detection angle ensures that the sensor can cover a wide area, reducing the need for multiple devices in larger spaces.

The sensor’s performance is influenced by factors such as the distance to the target, the angle of detection, and the presence of obstacles that may block or reflect radar signals. To ensure optimal performance, it is important to consider the layout of the space and the placement of the sensor in relation to potential sources of interference. The device’s low power consumption and USB-C power input make it suitable for use in energy-efficient systems where power flexibility is a key consideration.

Service and operation

The PNI HS402 requires minimal maintenance due to its solid-state design and lack of moving parts. Regular checks should be performed to ensure that the device is securely mounted and that the power supply is stable. If the sensor is installed in an area with high foot traffic or frequent changes in occupancy, it may be necessary to recalibrate the detection settings to ensure accurate performance. The Tuya app can be used to monitor the sensor’s status and adjust sensitivity settings as needed.

During operation, the sensor should be monitored for any signs of reduced performance, such as delayed response times or false detections. If any issues are detected, the device should be inspected for physical damage or interference from nearby objects. In most cases, resetting the device or adjusting the sensitivity settings can resolve common operational issues without the need for replacement.

Frequently asked questions

Can the PNI HS402 be used with smart home systems other than Tuya?
It is specifically designed for use with the Tuya app and may not be compatible with other smart home platforms without additional integration tools.

Does the sensor detect both movement and static presence?
Yes, the PNI HS402 can detect both movement and static presence, making it suitable for applications that require continuous occupancy monitoring.

Can the sensor be powered using a power bank?
Yes, the USB-C power input allows for flexible power solutions, including the use of a power bank for temporary or mobile installations.

Is the sensor suitable for outdoor use?
It is designed for use in semi-outdoor environments but should be protected from direct exposure to rain or extreme weather conditions to ensure long-term performance.