When jumpsuits take severe damage, their suit sensors break.

code/__DEFINES/misc.dm

@@ -201,6 +201,21 @@ GLOBAL_LIST_EMPTY(bloody_footprints_cache)
 #define BLOOD_STATE_XENO			"xeno"
 #define BLOOD_STATE_OIL				"oil"
 #define BLOOD_STATE_NOT_BLOODY		"no blood whatsoever"
+
+//suit sensors: sensor_mode defines
+
+#define SENSOR_OFF 0
+#define SENSOR_LIVING 1
+#define SENSOR_VITALS 2
+#define SENSOR_COORDS 3
+
+//suit sensors: has_sensor defines
+
+#define BROKEN_SENSORS -1
+#define NO_SENSORS 0
+#define HAS_SENSORS 1
+#define LOCKED_SENSORS 2
+
 //Turf wet states
 #define TURF_DRY		0
 #define TURF_WET_WATER	1