diff --git a/meshtastic/mesh.proto b/meshtastic/mesh.proto
index 7ce744c..2e15118 100644
--- a/meshtastic/mesh.proto
+++ b/meshtastic/mesh.proto
@@ -693,6 +693,11 @@ enum HardwareModel {
    * Lilygo T-ETH-Elite
    */
   T_ETH_ELITE = 91;
+  
+  /*
+   * Heltec HRI-3621 industrial probe
+   */
+  HELTEC_SENSOR_HUB = 92;
 
   /*
    * ------------------------------------------------------------------------------------------------------------------------------------------