This system responds to a demand for the remote monitoring of tank levels, displaying the current situation on a telephone display or at an e-mail address. A transmitter with a GSM modem is connected to the OCIO level indicator and, via one or more expansions, can control up to 8 tanks. Each tank is fitted with a level indicator which is connected by cable to the OCIO GSM box or to individual expansions. The system configuration involves sending coded telephone messages. The OCIO GSM system provides:

- Instant tank level reading.

- Two alarms (minimum and maximum level) which send messages to one or more enabled telephone numbers or an e-mail address.

- Regular tank level readings sent at pre-set intervals to predefined telephone numbers or an e-mail address.