Sensor Change Overdue On piCObaby, piCO and Micro+

Why is my piCObaby, piCO or Micro+ showing a circle with 'SEN01' and a red date?

The device's sensor change is overdue, contact your distributor to arrange a service.

If the problem persists or has not been resolved by the information provided above, please contact Bedfont or your local distributor for more advice.

micro-sensor-overdue pico-warning piCObaby-sensor-expired