Sensor Change Due In 30 Days For GastroCH4ECK

Why does my GastroCH4ECK say SEN01 and a date?

Your device is due for its sensor change and service in less than 30 days. Make arrangements to service the device. See the user manual for more information regarding the service of device. 

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