diff --git a/src/sensors/carbondioxide.rs b/src/sensors/carbondioxide.rs
new file mode 100644
index 0000000..4309db1
--- /dev/null
+++ b/src/sensors/carbondioxide.rs
@@ -0,0 +1,86 @@
+//! Module providing carbondioxide sensor functionality.
+
+use super::{FromSensorTemplate, SensorMetadataWithLocation, SensorTemplate, SensorTemplateError, Sensors};
+use serde::{Deserialize, Serialize};
+
+#[derive(Serialize, Deserialize, Default, Debug, Clone, PartialEq)]
+pub struct CarbondioxideSensor {
+    #[serde(flatten)]
+    pub metadata: SensorMetadataWithLocation,
+    pub unit: String,
+    pub value: u64,
+}
+
+#[derive(Debug, Clone)]
+pub struct CarbondioxideSensorTemplate {
+    pub metadata: SensorMetadataWithLocation,
+    pub unit: String,
+}
+
+impl FromSensorTemplate<CarbondioxideSensorTemplate> for CarbondioxideSensor {
+    fn try_from_template(
+        template: &CarbondioxideSensorTemplate,
+        value: &str,
+    ) -> Result<Self, SensorTemplateError> {
+        Ok(Self {
+            metadata: template.metadata.clone(),
+            unit: template.unit.clone(),
+            value: value.parse()?,
+        })
+    }
+}
+
+impl SensorTemplate for CarbondioxideSensorTemplate {
+    fn try_to_sensor(&self, value_str: &str, sensors: &mut Sensors) -> Result<(), SensorTemplateError> {
+        sensors
+            .carbondioxide
+            .push(CarbondioxideSensor::try_from_template(self, value_str)?);
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_template() {
+        let template = CarbondioxideSensorTemplate {
+            metadata: SensorMetadataWithLocation {
+                location: "Main Room".into(),
+                description: Some("Centre of main room on ground floor".into()),
+                ..Default::default()
+            },
+            unit: "ppm".into(),
+        };
+
+        let mut sensors = Sensors::default();
+        template.to_sensor("1234", &mut sensors);
+
+        assert_eq!(
+            "[{\"location\":\"Main Room\",\"description\":\"Centre of main room on ground floor\",\"unit\":\"ppm\",\"value\":1234}]",
+            serde_json::to_string(&sensors.carbondioxide).unwrap()
+        );
+    }
+
+    #[test]
+    fn test_template_bad_float() {
+        let template = CarbondioxideSensorTemplate {
+            metadata: SensorMetadataWithLocation {
+                location: "Main Room".into(),
+                description: Some("Centre of main room on ground floor".into()),
+                ..Default::default()
+            },
+            unit: "ppm".into(),
+        };
+
+        let mut sensors = Sensors::default();
+        let result = template.try_to_sensor("one thousand two hundred thirty four", &mut sensors);
+
+        assert!(result.is_err());
+        assert_eq!(
+            "sensor integer value cannot be parsed",
+            result.err().unwrap().to_string()
+        );
+    }
+}
diff --git a/src/sensors/mod.rs b/src/sensors/mod.rs
index 8637b13..9d05f88 100644
--- a/src/sensors/mod.rs
+++ b/src/sensors/mod.rs
@@ -13,6 +13,7 @@ mod radiation;
 mod temperature;
 mod total_member_count;
 mod wind;
+mod carbondioxide;
 
 pub use account_balance::{AccountBalanceSensor, AccountBalanceSensorTemplate};
 pub use barometer::{BarometerSensor, BarometerSensorTemplate};
@@ -33,6 +34,7 @@ pub use radiation::{RadiationSensor, RadiationSensorUnit, RadiationSensors};
 pub use temperature::{TemperatureSensor, TemperatureSensorTemplate};
 pub use total_member_count::{TotalMemberCountSensor, TotalMemberCountSensorTemplate};
 pub use wind::{WindSensor, WindSensorMeasurement, WindSensorProperties};
+pub use carbondioxide::{CarbondioxideSensor, CarbondioxideSensorTemplate};
 
 use log::warn;
 use serde::{Deserialize, Serialize};
@@ -125,6 +127,8 @@ pub struct Sensors {
     pub people_now_present: Vec<PeopleNowPresentSensor>,
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
     pub network_traffic: Vec<NetworkTrafficSensor>,
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub carbondioxide: Vec<CarbondioxideSensor>,
 }
 
 #[cfg(test)]