The present invention relates to a device for home monitoring of haematological parameters of patients. In particular, the device may be configured for home monitoring of patients undergoing chemotherapy. A white blood cell counter is presented in combination with a physically separated user device. The user interface and the white blood cell counter are configured to exchange data with each other. The present invention allows the white blood cell counter to be produced at lower costs, since no display is integrated into it directly. The patients may use the user interface device anywhere in their home or even on the go, allowing the maximum in freedom to fill in patient-reported outcomes or health assessment questionnaires. Also taking temperature readings is facilitated. In the home, a white blood cell test can be performed if required. The user interface guides the patient through the correct process and may therefore be brought to the cell counter.
