Wireless Customer Transfer and Billing Made Simple. Trimble Unity software combined with Telog wireless, battery-powered, recording telemetry system provides a GIS-centric cloud and mobile platform for billing/custody transfer monitoring. Telog’s RTU can be provided with optional ultrasonic or pressure level sensors for monitoring weirs and/or flumes for high accuracy billing applications. Telog recorders can store data internally for many months, if required, and wirelessly transmit on a defined schedule or in response to alarms, providing a complete solution for monitoring and managing customer transfers and billing operations.