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).