diff --git a/README.md b/README.md
index 4fd55bf..476ff6c 100644
--- a/README.md
+++ b/README.md
@@ -64,19 +64,19 @@ check_hwgroup --community public --snmp-version 2c --port 1161 --host poseidon2-
 ```bash
 check_hwgroup --community public --snmp-version 2c --port 1161 --host poseidon2-3266.internal --warning 1 --critical 1 --contact 1
 
-[OK] - Poseidon2 3266 SNMP Supervisor v3.8.4 - Contact name: Binary 1, AlarmState: normal, AlarmSetup: active if on|'Binary 1'=0;1;1
+[OK] - Poseidon2 3266 SNMP Supervisor v3.8.4 - Contact name: Binary 1, SensorState: 0, AlarmSetup: active if on|'Binary 1'=0;1;1
 ```
 
 ```bash
 check_hwgroup --community public --snmp-version 1 --port 161 --host damocles-mini.internal --warning 1 --critical 1 --contact 1
 
-[OK] - Damocles MINI SNMP Supervisor v1.0.11 - Contact name: Input 1, AlarmState: normal, AlarmSetup: inactive|'Input 1'=0;1;1
+[OK] - Damocles MINI SNMP Supervisor v1.0.11 - Contact name: Input 1, SensorState: 0, AlarmSetup: inactive|'Input 1'=0;1;1
 ```
 
 How the plugin maps the returned contact states:
 
-- `0`: normal
-- `1`: activated
+- `0`: 0
+- `1`: 1
 - `everything else`: unknown
 
 How the plugin maps the returned contact setup:
diff --git a/internal/hwgroup/hwgroup.go b/internal/hwgroup/hwgroup.go
index 7bd647b..6f864d4 100644
--- a/internal/hwgroup/hwgroup.go
+++ b/internal/hwgroup/hwgroup.go
@@ -57,10 +57,10 @@ type SensorResult struct {
 // ContactOutputFields is added to the SensorResult when Contact or Output is requested,
 // so that we can add the extra information
 type ContactOutputFields struct {
-	Value      float64 // col 2: current state (0/1)
-	Name       string  // col 3: user-defined label
-	AlarmSetup int     // col 4: alarm config index (contact) / type index (output)
-	AlarmState int     // col 5: alarm state index (contact) / mode index (output)
+	Value       float64 // col 2: current state (0/1)
+	Name        string  // col 3: user-defined label
+	AlarmSetup  int     // col 4: alarm config index (contact) / type index (output)
+	SensorState int     // col 5: sensor state index (contact) / mode index (output)
 }
 
 // ContactString returns a string representation of the state
@@ -70,11 +70,11 @@ func (cf *ContactOutputFields) ContactString() string {
 
 	// From vendor docs:
 	// Current sensor state 0 = normal, 1 = Alarm activated but not send
-	switch cf.AlarmState {
+	switch cf.SensorState {
 	case 0:
-		state = "normal"
+		state = "0"
 	case 1:
-		state = "activated"
+		state = "1"
 	default:
 		state = unknownState
 	}
@@ -95,7 +95,7 @@ func (cf *ContactOutputFields) ContactString() string {
 		setup = unknownState
 	}
 
-	return fmt.Sprintf("Contact name: %s, AlarmState: %s, AlarmSetup: %s", cf.Name, state, setup)
+	return fmt.Sprintf("Contact name: %s, SensorState: %s, AlarmSetup: %s", cf.Name, state, setup)
 }
 
 // OutputString returns a string representation of the state
@@ -107,7 +107,7 @@ func (cf *ContactOutputFields) OutputString() string {
 	// 0: X/Y = On / Off (Relay output)
 	// 1: X/Y = "On (+10V)" / "Off (-10V)" (RTS output)
 	// 2: X/Y = "On (+10V)" / "Off (0V)" (DTR output)
-	switch cf.AlarmState {
+	switch cf.SensorState {
 	case 0:
 		state = "On / Off (Relay output)"
 	case 1:
@@ -446,7 +446,7 @@ func (c *Client) getContactOutputFields(table string, devNum int, id uint) (Cont
 	fields.Value = currentState
 	fields.Name = userLabel
 	fields.AlarmSetup = alarmConfig
-	fields.AlarmState = alarmState
+	fields.SensorState = alarmState
 
 	return fields, nil
 }
diff --git a/internal/hwgroup/hwgroup_test.go b/internal/hwgroup/hwgroup_test.go
index 530b225..68006d8 100644
--- a/internal/hwgroup/hwgroup_test.go
+++ b/internal/hwgroup/hwgroup_test.go
@@ -65,9 +65,9 @@ func TestIsSupportedDevice(t *testing.T) {
 }
 
 func TestContactOutputFields_ContactString(t *testing.T) {
-	cf := ContactOutputFields{Name: "Unit", AlarmState: 0, AlarmSetup: 0}
+	cf := ContactOutputFields{Name: "Unit", SensorState: 0, AlarmSetup: 0}
 
-	expected := "Contact name: Unit, AlarmState: normal, AlarmSetup: active if on"
+	expected := "Contact name: Unit, SensorState: 0, AlarmSetup: active if on"
 
 	if actual := cf.ContactString(); actual != expected {
 		t.Errorf("actual: %v, expected: %v", actual, expected)
@@ -75,7 +75,7 @@ func TestContactOutputFields_ContactString(t *testing.T) {
 }
 
 func TestContactOutputFields_OutputString(t *testing.T) {
-	cf := ContactOutputFields{Name: "Unit", AlarmState: 2, AlarmSetup: 3}
+	cf := ContactOutputFields{Name: "Unit", SensorState: 2, AlarmSetup: 3}
 
 	expected := "Output name: Unit, Type: On (+10V) / Off (0V) (DTR output), Mode: On if value higher than Trigger"