diff --git a/homeassistant/components/tuya/binary_sensor.py b/homeassistant/components/tuya/binary_sensor.py
index 0a6f0aed053..a00e4e19e1a 100644
--- a/homeassistant/components/tuya/binary_sensor.py
+++ b/homeassistant/components/tuya/binary_sensor.py
@@ -1,14 +1,18 @@
 """Support for Tuya binary sensors."""
 from __future__ import annotations
 
+from dataclasses import dataclass
+
 from tuya_iot import TuyaDevice, TuyaDeviceManager
 
 from homeassistant.components.binary_sensor import (
     DEVICE_CLASS_DOOR,
+    DEVICE_CLASS_MOTION,
     BinarySensorEntity,
     BinarySensorEntityDescription,
 )
 from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import ENTITY_CATEGORY_DIAGNOSTIC
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -17,24 +21,46 @@ from . import HomeAssistantTuyaData
 from .base import TuyaEntity
 from .const import DOMAIN, TUYA_DISCOVERY_NEW, DPCode
 
+
+@dataclass
+class TuyaBinarySensorEntityDescription(BinarySensorEntityDescription):
+    """Describes a Tuya binary sensor."""
+
+    on_value: bool | float | int | str = True
+
+
 # All descriptions can be found here. Mostly the Boolean data types in the
 # default status set of each category (that don't have a set instruction)
 # end up being a binary sensor.
 # https://developer.tuya.com/en/docs/iot/standarddescription?id=K9i5ql6waswzq
-BINARY_SENSORS: dict[str, tuple[BinarySensorEntityDescription, ...]] = {
+BINARY_SENSORS: dict[str, tuple[TuyaBinarySensorEntityDescription, ...]] = {
     # Door Window Sensor
     # https://developer.tuya.com/en/docs/iot/s?id=K9gf48hm02l8m
     "mcs": (
-        BinarySensorEntityDescription(
+        TuyaBinarySensorEntityDescription(
             key=DPCode.DOORCONTACT_STATE,
             device_class=DEVICE_CLASS_DOOR,
         ),
-        BinarySensorEntityDescription(
+        TuyaBinarySensorEntityDescription(
             key=DPCode.TEMPER_ALARM,
             name="Tamper",
             entity_registry_enabled_default=False,
         ),
     ),
+    # PIR Detector
+    # https://developer.tuya.com/en/docs/iot/categorypir?id=Kaiuz3ss11b80
+    "pir": (
+        TuyaBinarySensorEntityDescription(
+            key=DPCode.PIR,
+            device_class=DEVICE_CLASS_MOTION,
+            on_value="pir",
+        ),
+        TuyaBinarySensorEntityDescription(
+            key=DPCode.TEMPER_ALARM,
+            name="Tamper",
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
+        ),
+    ),
 }
 
 
@@ -74,11 +100,13 @@ async def async_setup_entry(
 class TuyaBinarySensorEntity(TuyaEntity, BinarySensorEntity):
     """Tuya Binary Sensor Entity."""
 
+    entity_description: TuyaBinarySensorEntityDescription
+
     def __init__(
         self,
         device: TuyaDevice,
         device_manager: TuyaDeviceManager,
-        description: BinarySensorEntityDescription,
+        description: TuyaBinarySensorEntityDescription,
     ) -> None:
         """Init Tuya binary sensor."""
         super().__init__(device, device_manager)
@@ -88,4 +116,9 @@ class TuyaBinarySensorEntity(TuyaEntity, BinarySensorEntity):
     @property
     def is_on(self) -> bool:
         """Return true if sensor is on."""
-        return self.device.status.get(self.entity_description.key, False)
+        if self.entity_description.key not in self.device.status:
+            return False
+        return (
+            self.device.status[self.entity_description.key]
+            == self.entity_description.on_value
+        )
diff --git a/homeassistant/components/tuya/const.py b/homeassistant/components/tuya/const.py
index 0bc71a478b4..f25dacaab37 100644
--- a/homeassistant/components/tuya/const.py
+++ b/homeassistant/components/tuya/const.py
@@ -37,13 +37,13 @@ TUYA_SUPPORTED_PRODUCT_CATEGORIES = (
     "fs",  # Fan
     "fwl",  # Ambient light
     "jsq",  # Humidifier's light
-    "kfj",  # Coffee Maker
+    "kfj",  # Coffee maker
     "kg",  # Switch
     "kj",  # Air Purifier
-    "kfj",  # Coffee maker
     "kt",  # Air conditioner
     "mcs",  # Door Window Sensor
     "pc",  # Power Strip
+    "pir",  # PIR Detector
     "qn",  # Heater
     "wk",  # Thermostat
     "xdd",  # Ceiling Light
@@ -96,6 +96,7 @@ class DPCode(str, Enum):
     LOCK = "lock"  # Lock / Child lock
     MATERIAL = "material"  # Material
     MODE = "mode"  # Working mode / Mode
+    PIR = "pir"  # Motion sensor
     POWDER_SET = "powder_set"  # Powder
     PUMP_RESET = "pump_reset"  # Water pump reset
     SHAKE = "shake"  # Oscillating
diff --git a/homeassistant/components/tuya/sensor.py b/homeassistant/components/tuya/sensor.py
index 8d36a9b1207..0d6d179ab76 100644
--- a/homeassistant/components/tuya/sensor.py
+++ b/homeassistant/components/tuya/sensor.py
@@ -17,6 +17,7 @@ from homeassistant.const import (
     DEVICE_CLASS_CURRENT,
     DEVICE_CLASS_POWER,
     DEVICE_CLASS_VOLTAGE,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     PERCENTAGE,
 )
 from homeassistant.core import HomeAssistant, callback
@@ -74,6 +75,23 @@ SENSORS: dict[str, tuple[SensorEntityDescription, ...]] = {
             entity_registry_enabled_default=False,
         ),
     ),
+    # PIR Detector
+    # https://developer.tuya.com/en/docs/iot/categorypir?id=Kaiuz3ss11b80
+    "pir": (
+        SensorEntityDescription(
+            key=DPCode.BATTERY_PERCENTAGE,
+            name="Battery",
+            native_unit_of_measurement=PERCENTAGE,
+            device_class=DEVICE_CLASS_BATTERY,
+            state_class=STATE_CLASS_MEASUREMENT,
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
+        ),
+        SensorEntityDescription(
+            key=DPCode.BATTERY_STATE,
+            name="Battery State",
+            entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
+        ),
+    ),
 }
 
 # Socket (duplicate of `kg`)