Annual BWTS Sensor Calibration: Instrument-Level Tender Line Items

Build the instrument schedule

List tag, manufacturer, model, serial number, location and measured variable. Distinguish the BWMS maker from the sensor or analyser maker. Include the current calibration status and due-date basis. Similar system names do not establish that the same instrument package or procedure is fitted.

Define the required work

Specify whether each line requires calibration, verification, functional testing or replacement-related checks. Reference the applicable procedure and acceptance criteria rather than inventing a universal tolerance. Identify instruments needing operation, isolation, removal or workshop work so the provider can plan labour and reference equipment accurately.

Specify evidence and commercial units

Request instrument-specific results, relevant reference identification, adjustments and limitations. Price by defined tasks and explain any shared mobilisation. Sea Clean provides annual calibration and calibration certificates for all EC BWTS makes and variants; the schedule makes the quotation precise without restricting service to named directory entries.

Illustrative procurement scenario

A fleet tender initially lists one BWTS per vessel. The revised instrument schedule separates analyser, flow, conductivity and other installed duties, each with identification and access information. Providers can then quote the actual tasks and references. The resulting prices are more comparable than offers built from different assumptions about how many devices a generic system includes.

Sea Clean service and quotation requirements

Sea Clean services all EC BWTS manufacturers and variants, including annual instrument calibration, calibration certificates, diagnostics and spare-parts support. Sea Clean is an authorised Headway agent; other manufacturers are serviced independently.

Include the following with the email request: Instrument register, methods, ranges, due dates and vessel attendance window. Multiple vessels in the same area or along an efficient route can be assessed for shared mobilisation. Prices, component availability and attendance arrangements are stated in the quotation.

Service scope and vessel attendance: BWTS service, calibration and testing coordination

Frequently asked questions

Is the number of sensors enough for a calibration quote?

No. Their functions, models, methods, ranges and access conditions determine the work. A count is useful only alongside an instrument schedule.

Sources

• US EPA — 2013 VGP and VIDA interim requirements — Jurisdiction-specific applicability and transition status; not a universal annual-testing rule.
• US EPA — 2013 Vessel General Permit — Read the applicable permit provisions together with current EPA/USCG transition guidance.
• Inspekt — Calibration of BWTS sensors — Sensor categories and onboard/workshop service context, not a substitute for installed-equipment procedures.

Related articles

• BWTS Calibration Certificates: Reconciliation with the Instrument Register
• BWTS Sensor Calibration: Specifying Range, Units and Acceptance Criteria
• BWTS Calibration Work Orders: Local Measurement and Control-Loop Verification
• BWTS Calibration Procurement: Reference Standards and Traceability Evidence
• BWTS Sensor Calibration: Onboard and Workshop Logistics
• BWTS Calibration Planning: Rotating Installed and Spare Sensors

Request a technical quotation

Instrument register, methods, ranges, due dates and vessel attendance window.

Email RFQ to post@seaclean.no

Opens an email draft with this article reference. Add vessel, equipment and port details before sending. No website form or submission inbox.