diff --git a/homeassistant/components/tuya/number.py b/homeassistant/components/tuya/number.py
index d2e381d9982..8d5b5dbfa19 100644
--- a/homeassistant/components/tuya/number.py
+++ b/homeassistant/components/tuya/number.py
@@ -292,6 +292,17 @@ NUMBERS: dict[str, tuple[NumberEntityDescription, ...]] = {
             device_class=NumberDeviceClass.TEMPERATURE,
         ),
     ),
+    # CO2 Detector
+    # https://developer.tuya.com/en/docs/iot/categoryco2bj?id=Kaiuz3wes7yuy
+    "co2bj": (
+        NumberEntityDescription(
+            key=DPCode.ALARM_TIME,
+            translation_key="alarm_duration",
+            native_unit_of_measurement=UnitOfTime.SECONDS,
+            device_class=NumberDeviceClass.DURATION,
+            entity_category=EntityCategory.CONFIG,
+        ),
+    ),
 }
 
 
diff --git a/homeassistant/components/tuya/select.py b/homeassistant/components/tuya/select.py
index abc5e4c496b..831d3cb3e0c 100644
--- a/homeassistant/components/tuya/select.py
+++ b/homeassistant/components/tuya/select.py
@@ -307,6 +307,15 @@ SELECTS: dict[str, tuple[SelectEntityDescription, ...]] = {
             entity_category=EntityCategory.CONFIG,
         ),
     ),
+    # CO2 Detector
+    # https://developer.tuya.com/en/docs/iot/categoryco2bj?id=Kaiuz3wes7yuy
+    "co2bj": (
+        SelectEntityDescription(
+            key=DPCode.ALARM_VOLUME,
+            translation_key="volume",
+            entity_category=EntityCategory.CONFIG,
+        ),
+    ),
 }
 
 # Socket (duplicate of `kg`)
diff --git a/homeassistant/components/tuya/sensor.py b/homeassistant/components/tuya/sensor.py
index 81c8e64be6d..f766c744998 100644
--- a/homeassistant/components/tuya/sensor.py
+++ b/homeassistant/components/tuya/sensor.py
@@ -214,6 +214,12 @@ SENSORS: dict[str, tuple[TuyaSensorEntityDescription, ...]] = {
             device_class=SensorDeviceClass.VOLATILE_ORGANIC_COMPOUNDS,
             state_class=SensorStateClass.MEASUREMENT,
         ),
+        TuyaSensorEntityDescription(
+            key=DPCode.PM25_VALUE,
+            translation_key="pm25",
+            device_class=SensorDeviceClass.PM25,
+            state_class=SensorStateClass.MEASUREMENT,
+        ),
         *BATTERY_SENSORS,
     ),
     # Two-way temperature and humidity switch
diff --git a/homeassistant/components/tuya/siren.py b/homeassistant/components/tuya/siren.py
index 334dced134d..6f7dfe4c96c 100644
--- a/homeassistant/components/tuya/siren.py
+++ b/homeassistant/components/tuya/siren.py
@@ -11,6 +11,7 @@ from homeassistant.components.siren import (
     SirenEntityDescription,
     SirenEntityFeature,
 )
+from homeassistant.const import EntityCategory
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
@@ -43,6 +44,14 @@ SIRENS: dict[str, tuple[SirenEntityDescription, ...]] = {
             key=DPCode.SIREN_SWITCH,
         ),
     ),
+    # CO2 Detector
+    # https://developer.tuya.com/en/docs/iot/categoryco2bj?id=Kaiuz3wes7yuy
+    "co2bj": (
+        SirenEntityDescription(
+            key=DPCode.ALARM_SWITCH,
+            entity_category=EntityCategory.CONFIG,
+        ),
+    ),
 }
 
 
diff --git a/homeassistant/components/tuya/strings.json b/homeassistant/components/tuya/strings.json
index 0f005821cbb..8ec61cc8aa5 100644
--- a/homeassistant/components/tuya/strings.json
+++ b/homeassistant/components/tuya/strings.json
@@ -119,6 +119,9 @@
       }
     },
     "number": {
+      "alarm_duration": {
+        "name": "Alarm duration"
+      },
       "temperature": {
         "name": "[%key:component::sensor::entity_component::temperature::name%]"
       },