Custody Transfer Monitoring
Custody transfer is where product - and money - changes hands, at LACT units and metered interconnects. The volumes recorded there settle payments, so collecting that data reliably from every point, and catching measurement faults fast, is not optional. Cloud SCADA brings custody data from dozens of remote points into one place.
Custody transfer monitoring software collects volume, flow rate, and measurement data from LACT units and flow computers across an operation, alarms on measurement faults or a stopped meter, and retains auditable records - so allocation and settlement data is complete and defensible, from a cloud dashboard.
Collecting Measurement Data Remotely
A LACT unit and its flow computer calculate net volume corrected to standards and expose the results over Modbus or DNP3. The operational challenge is collecting that data reliably from many remote points for daily allocation. Merobix reads Modbus and DNP3 flow computers over cellular, so today's volumes from every custody point land in one dashboard, and the built-in historian retains the measurement record.
Catching Measurement Problems Fast
A meter that has stopped, a flow computer in alarm, or a BS&W spike are measurement problems that cost money the longer they go unnoticed. Alarming on flow-computer fault flags and abnormal rates surfaces them in seconds rather than at month-end reconciliation, when a discrepancy is far harder and costlier to resolve. See connecting flow computers for the integration detail.
What You Get With Merobix
- Alarms that reach a person. SMS and email typically within a minute of a value crossing a threshold, with on-call escalation - included on every plan.
- Cellular edge, no server room. A gateway reads your devices and connects outbound to the cloud - no fixed IP, no VPN, no on-premise SCADA server.
- A built-in historian. Every reading is retained for trends, production reporting, and compliance records, queryable from any browser.
- One team for the whole stack. The same Texas team runs your SCADA and, if needed, programs your PLCs and builds your control panels.
Frequently Asked Questions
What does custody transfer monitoring collect?
Net and gross volumes, flow rates, and measurement data from LACT units and flow computers, plus fault flags. It alarms on measurement faults or a stopped meter and retains auditable records for allocation and settlement.
Can I collect LACT and flow computer data over cellular?
Yes. Flow computers expose data over Modbus and sometimes DNP3, which Merobix reads over a cellular gateway - so volumes from every custody point reach one dashboard without an on-premise measurement host.
How does monitoring help with allocation?
By collecting complete daily volumes from every custody point into one place and retaining them in a historian, monitoring makes allocation and settlement data complete and defensible, and surfaces measurement faults before month-end reconciliation.
Is the measurement record auditable?
Yes. Merobix's built-in historian retains volumes, rates, and alarms over time, supporting auditable measurement records for custody and allocation.
Sources and verification
This page references the protocol specifications published by the organizations below. Editions, product capabilities, and documentation change over time - confirm current requirements and specifications directly with the source.
- Modbus Application Protocol Specification - Modbus Organization
- Overview of DNP3 (IEEE Std 1815) - DNP Users Group
Merobix is not affiliated with, endorsed by, or sponsored by these organizations; their names are used only to identify the standards and products discussed.
Automation services
Need help turning this into a working system?
Merobix integrates SCADA, programs Allen-Bradley and Siemens PLCs, and designs and fabricates industrial control panels.
Meeting requests are reviewed before confirmation.