SKU: SENS-3190
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Tuya PST-FH400A Smart WiFi Door & Light Sensor 2-in-1 - Wall Mount, Alexa/Google Assistant

₹819.00 (Inclusive of all taxes)
Out of Stock

The Tuya PST-FH400A is a dual-function smart sensor integrating door/window contact monitoring and ambient light detection, designed for seamless integration with the Tuya Smart ecosystem, Alexa, and Google Assistant for automated home security and lighting control.

Features

  • Dual-function sensor combining magnetic door/window contact and ambient light level detection.
  • Direct WiFi (2.4 GHz) connectivity with Tuya Smart app for remote monitoring and instant push notifications.
  • Enables intelligent automation scenes, such as triggering lights upon door opening or based on daylight.
  • Voice control compatibility with Amazon Alexa and Google Assistant for hands-free operation.
  • Compact, wall-mountable ABS housing with low-battery detection for reliable, long-term use.

Out of stock

Description

The PST-FH400A operates as a combined reed switch and photodetector module. The magnetic contact sensor detects door or window position (open/closed), while the integrated light sensor measures ambient lux levels. This data is processed on-board and transmitted via 2.4 GHz WiFi to the Tuya cloud, enabling real-time status updates and alerting.

Designed for smart home integration, the sensor facilitates complex automation rules without a separate hub. Its low-power design runs on two AAA batteries and includes power management for battery life alerts. The ABS plastic housing is rated for indoor residential environments.

Key Features

  • Integrated dual sensing: Magnetic reed switch for door/window status and ambient light sensor.
  • Direct 2.4 GHz IEEE 802.11 b/g/n WiFi connectivity eliminates the need for a separate gateway.
  • Fully compatible with the Tuya Smart ecosystem for app control, scheduling, and scene automation.
  • Supports voice command integration with Amazon Alexa and Google Assistant.
  • Generates instant mobile push notifications for door/window events.
  • Features built-in low-battery detection and alerting.
  • Compact and discreet design with included double-sided tape for easy wall mounting.
  • Optimized for indoor home automation, security monitoring, and energy-saving lighting control.

Applications

  • Smart home security systems for monitoring door and window entry points.
  • Automated indoor lighting control based on occupancy and natural light levels.
  • Energy management scenes to turn off lights or appliances when a room is unoccupied.
  • Integration into voice-controlled smart home routines for enhanced convenience.
  • Remote property monitoring, providing instant alerts for unauthorized access.

Technical Specifications

Model NumberPST-FH400A
BrandTuya
Primary FunctionsDoor/Window Contact Sensor, Ambient Light Sensor
ConnectivityWiFi (IEEE 802.11 b/g/n 2.4 GHz)
CompatibilityTuya Smart App, Amazon Alexa, Google Assistant
Housing MaterialABS Plastic
Power Supply2 x AAA 1.5V Batteries (Included)
Operating Temperature-10°C to +50°C
Operating Humidity5% to 95% RH (non-condensing)
InstallationWall-mounted (Double-sided tape included)
Dimensions (L x W)70 mm x 25 mm
Weight (Sensor Only)18 g

Frequently Asked Questions

Does the PST-FH400A sensor require a separate hub or gateway?

No, it does not require a separate hub. The sensor connects directly to your home's 2.4 GHz WiFi network and communicates with the Tuya cloud. You only need the Tuya Smart app on your smartphone for setup, control, and creating automation scenes.

What kind of automation can I create with this dual sensor?

You can create rules based on either sensor input. For example, turn on smart lights when the door opens and it's dark (low light level), or send an alert if a window is opened after sunset. The Tuya app allows for complex 'if-this-then-that' scenarios linking this sensor to other Tuya-compatible smart devices.

How is the sensor powered and what is the expected battery life?

The sensor is powered by two included AAA batteries. Battery life depends on usage, network conditions, and notification frequency, but typically lasts several months to a year. The sensor features low-battery detection and will send an alert to the Tuya app when batteries need replacement.

Can I use this sensor outdoors?

No, the PST-FH400A is designed for indoor use only. Its operating temperature range is -10°C to +50°C and it is not rated for water or dust resistance (IP rating). It should be installed in dry, protected indoor locations.

Package Includes

  • 1 x PST-FH400A WiFi Door & Light Sensor
  • 2 x AAA 1.5V Batteries
  • 1 x Double-sided Mounting Tape
  • 1 x User Manual

Additional Information

Weight 0.018 kg
Dimensions 7 × 2.5 cm