Blood pressure monitoring device , comprising: a first sensor (110; 110 1 ) configured to obtain first measurement data (112; 112 1 ) by occlusively , oscillometrically measuring blood pressure values, a second sensor configured to obtain second measurement data by non-occlusively measuring blood volume changes, a third sensor (110 2 ) configured to obtain third measurement data (112 2 ) by occlusively , oscillometrically measuring blood pressure values, a controller configured to initialize and conduct a blood pressure monitoring interval , wherein the controller is configured - to achieve the first measurement data (112; 112 1 ) from the first sensor (110; 110 1 ) and to achieve the third measurement data (112 2 ) from the third sensor (110 2 ) and to determine reference data for the second sensor based on the first measurement data (112; 112 1 ) and the third measurement data (112 2 ) when initializing the blood pressure monitoring interval , - to achieve the second measurement data from the second sensor during the blood pressure monitoring interval , and - to determine blood pressure values during the blood pressure monitoring interval based on the second measurement data and the reference data , a first inflatable cuff (170; 170 1 ) comprising the first sensor (110; 110 1 ), and a second inflatable cuff (170 2 ) comprising the third sensor (110 2 ), wherein the second sensor is positioned laterally between the first inflatable cuff (170; 170 1 ) and the second inflatable cuff (170 2 ). a first sensor (110; 110 1 ) configured to obtain first measurement data (112; 112 1 ) by occlusively , oscillometrically measuring blood pressure values, a second sensor configured to obtain second measurement data by non-occlusively measuring blood volume changes, a third sensor (110 2 ) configured to obtain third measurement data (112 2 ) by occlusively , oscillometrically measuring blood pressure values, a controller configured to initialize and conduct a blood pressure monitoring interval , wherein the controller is configured - to achieve the first measurement data (112; 112 1 ) from the first sensor (110; 110 1 ) and to achieve the third measurement data (112 2 ) from the third sensor (110 2 ) and to determine reference data for the second sensor based on the first measurement data (112; 112 1 ) and the third measurement data (112 2 ) when initializing the blood pressure monitoring interval , - to achieve the second measurement data from the second sensor during the blood pressure monitoring interval , and - to determine blood pressure values during the blood pressure monitoring interval based on the second measurement data and the reference data , - to achieve the first measurement data (112; 112 1 ) from the first sensor (110; 110 1 ) and to achieve the third measurement data (112 2 ) from the third sensor (110 2 ) and to determine reference data for the second sensor based on the first measurement data (112; 112 1 ) and the third measurement data (112 2 ) when initializing the blood pressure monitoring interval , - to achieve the second measurement data from the second sensor during the blood pressure monitoring interval , and - to determine blood pressure values during the blood pressure monitoring interval based on the second measurement data and the reference data , a first inflatable cuff (170; 170 1 ) comprising the first sensor (110; 110 1 ), and a second inflatable cuff (170 2 ) comprising the third sensor (110 2 ), wherein the second sensor is positioned laterally between the first inflatable cuff (170; 170 1 ) and the second inflatable cuff (170 2 ). <EOS>