diff --git a/csaxs_bec/device_configs/machine.yml b/csaxs_bec/device_configs/machine.yml
index 6610aecb..abc3458f 100644
--- a/csaxs_bec/device_configs/machine.yml
+++ b/csaxs_bec/device_configs/machine.yml
@@ -51,3 +51,22 @@ operator:
   softwareTrigger: false
   deviceTags:
     - machine
+
+injection_status:
+  # Top-up gating: '0' / 'Filling Storage Ring' means the storage ring is
+  # being refilled. readoutPriority is 'monitored' (not 'baseline') so this
+  # is captured continuously throughout the scan, not just read once at
+  # scan start - a top-up can start or stop mid-scan.
+  description: SLS injection/top-up status
+  deviceClass: ophyd_devices.EpicsSignalRO
+  deviceConfig:
+    read_pv: AGETI-CVME-MASTER-TMA:SR-Inj-Status-I
+    auto_monitor: true
+    string: true
+  onFailure: buffer
+  enabled: true
+  readoutPriority: monitored
+  readOnly: true
+  softwareTrigger: false
+  deviceTags:
+    - machine