diff --git a/meshtastic/telemetry.proto b/meshtastic/telemetry.proto
index deece46..9a2f547 100644
--- a/meshtastic/telemetry.proto
+++ b/meshtastic/telemetry.proto
@@ -318,6 +318,21 @@ message AirQualityMetrics {
    * CO2 sensor relative humidity in %
    */
   optional float co2_humidity = 15;
+
+  /*
+   * Formaldehyde sensor formaldehyde concentration in ppb
+   */
+  optional float form_formaldehyde = 16;
+
+  /*
+   * Formaldehyde sensor relative humidity in %RH
+   */
+  optional float form_humidity = 17;
+
+  /*
+   * Formaldehyde sensor temperature in degrees Celsius
+   */
+  optional float form_temperature = 18;
 }
 
 /*
@@ -716,6 +731,16 @@ enum TelemetrySensorType {
    * ADS1X15 ADC
    */
   ADS1X15 = 40;
+
+  /*
+   * ADS1X15 ADC_ALT
+   */
+  ADS1X15_ALT = 41;
+
+  /*
+   * Sensirion SFA30 Formaldehyde sensor
+   */
+  SFA30 = 42;
 }
 
 /*