Thin Plate Weirs

Our SIRIS thin plate weir range comes to fit standard sizes, including v-notch and rectangular weirs. We can also supply alternative size and specification weirs for applications where standard sizes cannot be used, such as large rectangular notch systems and compound weirs.

All SIRIS thin plate weirs are fabricated from marine-grade 316 stainless steel and machined by highly-accurate laser.

SIRIS thin plate weirs are guaranteed to meet MCERTS requirements and satisfy BS/ISO 1438.

Request info

Ideal for cleaner effluent

Thin plate weir devices are simple devices used for liquid flow measurement where high accuracy is required, and are ideal for testing cleaner effluent, such as industrial discharge and final effluent outfall applications.

Download

Long term and reliable flow measurement

Most of the standard size weir range come with a solid built-in approach fabrication which significantly reduces the likelihood of head gauging errors in the completed structure.

When designed and installed properly SIRIS flumes provide accurate long term and reliable flow measurement.

Accurate & reliable data

SIRIS weirs carry MCERTS accreditation so you can be confident that the data provided will provide accurate and reliable long-term flow measurement.

Our thin plate weir range is designed in accordance with BS/ISO 1438 and BS/ISO 4359 and will meet with relevant regulatory discharge and MCERTS requirements.

All SIRIS products are compatible with our web-based data recording software, which allows quick and easy access to your data at any time – from any location.

Design & installation

We pride ourselves in offering a bespoke service to all of our clients. Our design and installation process ensures we provide you with a cost-effective solution tailored to suit your site’s individual requirements.When you first contact SIRIS, our friendly team will be on hand to take your enquiry and assess your needs. We know that every site has different requirements, so we’ll work closely with you to understand your individual needs.

Enquiry When you first contact SIRIS, our friendly team will be on hand to take your enquiry and assess your needs. We know that every site has different requirements, so we’ll work closely with you to understand your individual needs.
Quote At this stage our wastewater management experts will provide a tailored quote for your system. For most sites we can do this using photographs, however for larger or more complicated sites we will arrange to visit you and assess it in person. If MCERTS is required we will ensure we develop a system that is fully compliant.
Build Our team will assemble your bespoke system at our dedicated facility. We’ll also pre-calibrate any equipment that can be commissioned off-site.
Delivery and installation We will arrange for your equipment to be delivered directly to site and liaise with your chosen contractor to advise on installation requirements. Depending on the project, we may also attend site to assist with the installation process.
Calibration Our specialist engineers will attend site to commission your equipment and check it’s working correctly. We’ll also go through your new system with you and answer any questions you have. Once we’ve completed the calibration we will be able to issue you with a CalCert which allows you to prove your site is fully compliant to auditors.
Aftercare Our team is always on hand to support with any queries or teething problems you may be experiencing. For most sites we also recommend a bi-annual servicing package to ensure your equipment continues to function correctly.

SIRIS celebrates 30 years of providing wastewater monitoring solutions We're delighted to celebrate 30 years of providing high quality wastewater monitoring solutions - and look to the future with our fresh new image and website. There has been a huge amount of growth and change since our founder Nick Richardson set up SIRIS as a sole trader 30 years ago. However our ethos and… Read article

Guide to: Consent to discharge trade effluent Do you think your business might need consent to discharge trade effluent? Navigating your responsibilities can be confusing. Our guide answers some frequently asked questions about consent to discharge and the steps your business needs to take. What is trade effluent? Trade effluent is any liquid waste your business discharges to the UK's water ways… Read article

Compatibility with site systems

Weir plates are generally simple to install and fit within your existing set-up.

All SIRIS products can be used with our data monitoring software, Palette, however they are also compatible with your existing SCADA system. Our expert team is committed to working in partnership with our customers to meet their individual requirements and ensure our products fit seamlessly into each site.

Nick Richardson says...

“SIRIS thin plate weirs come in a range of sizes, including v-notch and rectangular. We’ll work closely with you to provide the most cost-effective solution for your site and guarantee that it meets your requirements – as well as pass MCERTS inspections.”

Meet the team