| PST-FH400B Specifications | |
| Name | Tuya Smart WiFi Ceiling PIR Sensor |
| Model | PST-FH400B |
| APP Name | Tuya Smart or Smart Life |
| Color | White |
| Material | ABS |
| Power | DC3V LR03*2 Battery |
| USB input | DC5V/2A (USB cannot be used with dry battery, only rechargeable battery) |
| WiFi Standards | IEEE 802.11 b/n/g 2.4G Hz |
| PIR sensitivity angle | 360 degree |
| PIR sensitivity distance | 6m |
| Low-battery Detection | Support |
| Tuya Smart product Linkage control | Support |
| Operation Temp. | –10°C to +50°C |
| Humidity | 5%--95% non-condensing |
| Installation | Ceiling-mounted or Wall |
| Box Dimension | 11.5*6*4.2cm |
| Unit Weight | 80g |
| Carton Packing | 200PCS per carton: 15.5kg, 34*33*46cm |
| PST-FH400B Package List | |
| WiFi PIR Sensor | x1 |
| LR03 battery | x2 |
| Double-sided tape | x1 |
| Installation screws | x2 |
| User Manual | x1 |
| PST-FH400B Product FAQ | |
| Q1: What is this product? A: This is a Tuya Smart WiFi Light+PIR Sensor. It combines a motion - detecting PIR (Passive Infrared) sensor with lighting functionality and can be controlled via WiFi. |
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| Q2: Which WiFi frequencies does it support? A: It supports 2.4G Hz b/g/n WiFi frequencies. |
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| Q3: How do I connect the sensor to my Wi - Fi network? A: Download the Tuya Smart app from the app store. Open the app, create an account if you don't have one. Then, follow the in - app instructions to add a new device. Select the Wi - Fi vibration sensor and enter your Wi - Fi password when prompted. |
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| Q4: What if my Wi - Fi signal is weak near the sensor's location? A: You may consider using a Wi - Fi extender or a mesh Wi - Fi system to boost the signal. Ensure that the sensor is within a reasonable range of your router for optimal connectivity. |
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| Q5: Where should I install this motion detector? A: It is designed to be installed on the ceiling for optimal motion detection coverage. |
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| Q6: How does the PIR motion detection work? A: PIR technology detects changes in infrared radiation emitted by moving objects. When an object with a different temperature than the background moves in its detection range, it triggers the detector. |
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| Q7: How is the sensor powered? A: The sensor is powered by 2PCS DC1.5V LR03 ultra alkaline AAA batteries and also can be DC5V USB. |
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| Q9: How long does the battery last? A: Battery life depends on usage frequency and sensitivity settings. Under normal usage and default settings, the battery can last approximately 6 months if trigger 10 times a day. |
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| Q10: What should I do if the sensor doesn't connect to my Wi-Fi network? 1. Check the Basics Power: Ensure the sensor is properly powered. Wi - Fi Signal: Make sure the sensor is within range of your Wi - Fi router. 2. Reset the Sensor 3. Re - add the Device in the App 4. Check Router Settings 5. Update Router and App Firmware |
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| Q11: How quickly does it respond to motion? A: It has a fast - response time and can detect motion and send signals within milliseconds. |
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| Q12: Does the sensor work with voice assistants? A: It supports Amazon Alexa and Google Assistant. |
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| Q13. Does it work in the dark? A: Yes, since it uses infrared technology, it can detect motion regardless of lighting conditions. |
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| Q14. Which app should I use to control this device? A: You can use the Tuya - supported app. You can download it from the App Store (for iOS) or Google Play (for Android). |
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| Q15. Can I control the device remotely? A: Yes, as long as the device is connected to WiFi and your phone has an internet connection, you can control it remotely through the app. |
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| Q16. Is it a standalone device or does it need additional equipment? A: It's a standalone device, but it requires a WiFi connection to access its smart features via the Tuya app. |
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| Q17. The sensor is constantly sending false alerts. How can I fix this? Lower the sensitivity level in the app. Also, check if there are any sources of constant vibrations near the sensor (e.g., appliances) and relocate it if needed. |
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| Q18. The app can't find the sensor. What's wrong? Ensure the sensor is powered on and in pairing mode. Also, check your phone's Bluetooth and Wi - Fi settings, and make sure they are turned on. |
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| Q19. Can someone else access my sensor's data? As long as you keep your app account credentials secure, and your Wi - Fi network is protected, it's very unlikely that others can access your sensor's data. |
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| Q20. What if the device stops detecting motion? A: Check the detection settings in the app, make sure there are no obstructions in the detection area, and verify that the device is powered on and connected to WiFi. |
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| Q21. How does the light function work? A: When the PIR sensor detects motion, it can automatically turn on the light. You can also control the light manually through the app. |
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| Q22: Can I adjust the brightness of the light? A: Yes, you can adjust the brightness level of the light through the Tuya app to suit different lighting requirements. |
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| Q23: How long does the light stay on after motion is detected? A: You can set the light - on duration in the app, usually ranging from a few seconds to several minutes. |
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| Q24: What functions can I perform in the app? A: In the app, you can adjust PIR sensor sensitivity, control light brightness and color temperature (if applicable), set light - on duration, view battery level, and check motion detection history. |
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| Q25: If the light doesn't turn on when motion is detected, what should I do? A: First, check the light settings in the app to make sure it's set to turn on with motion. Also, check the power connection (if applicable) and the sensor's functionality. |
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| Q26. Can make OEM? A: Yes, we can. PID OEM:500PCS Box & manual OEM: 1000PCS, if only 500PCS extra charge 0.20USD/PCS; Laser Logo: 100PCS |
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