Choosing a CEMS vendor often starts with specifications and price. Both matter, but they are rarely where problems come from. Problems usually appear months later: data drops out, readings drift, or a report has to be prepared when nobody really understands the system.
For units required to monitor emissions with CEMS, MoEF Regulation (Permen LHK) No. 13 of 2021 on the Continuous Industrial Emission Monitoring Information System (SISPEK) adds another layer: monitoring must be integrated into SISPEK, and the data must meet set requirements. In other words, the vendor you choose shapes whether that obligation can be met calmly.
1. Who supports the integration into SISPEK?
Article 2 states that businesses or activities required to monitor emissions using CEMS must integrate their emission monitoring into SISPEK. The stages are:
- registration;
- administrative data entry;
- technical data entry;
- verification; and
- a connectivity test.
These stages need technical data about the installed system, from the analyzer to data communication. Ask early on: who prepares the technical data, and who will be present for the connectivity test?
2. What happens when the CEMS is replaced or the approval expires?
Article 7 states that the integration approval is valid for three years and can be extended. An extension must be requested no later than 60 calendar days before the approval expires, and re-integration is required when the approval has expired or the CEMS is replaced.
The practical question: will your vendor still be there, and still understand your system, three years from now? A system that has to be replaced early because of poor maintenance also means repeating the integration process.
3. How is the data kept valid?
Article 9 sets the requirements for data sent from the Data Interfacing System (DIS) to SISPEK. Among them, data is sent in real time once every hour, the data interval is at most a five-minute average, and the data sent must be valid data that has passed quality control and quality assurance.
Valid data does not come from the analyzer alone. It depends on a sample line free of condensation, scheduled calibration, and someone who checks when something looks wrong. Ask how the vendor keeps all three in place.
4. Who handles calibration, audits, and fault reporting?
Article 9 refers to CEMS calibration and audits using the CGA, RCA, and RATA methods, and Article 10 sets out reporting through the SIMPEL application. Reports on calibration and audits, abnormal conditions, or failures are due within 2 × 24 hours. Reports when DIS data is not sent to SISPEK are due within 3 × 24 hours.
These deadlines are short. Make sure it is clear who schedules calibration and audits, who prepares the data, and who can be reached when the system fails outside working hours.
5. What is covered after the purchase order?
A quotation that looks inexpensive often covers only equipment delivery. Compare the scope after the PO:
- installation and commissioning;
- training for operators and engineers;
- maintenance and troubleshooting;
- spare parts and consumables;
- data support and reporting.
Ask for all of it in writing. If upfront investment is a constraint, a rental scheme that combines equipment, maintenance, operation, and data support can be a more measured option.
In short
The right CEMS vendor is not only the one that sells a good analyzer, but the one that stays when the numbers are questioned. The five questions above can serve as a simple checklist before you compare quotations.
The regulatory summary in this article is for information. For the obligations that apply to your unit, refer to the official text of Permen LHK No. 13 of 2021 and your unit’s environmental approval.