Sales, engineering and field service for OPSIS systems — CEMS, ambient air, mercury, chlorine, ammonia and marine emissions.
OPSIS CEMS, ambient air quality stations, mercury and chlorine analysers, supplied with engineering, commissioning and acceptance support.
Installation supervision, commissioning, calibration, QAL3 checks, spare parts and annual service contracts for OPSIS systems in China.
Bid documents, certification packages, export supply and on-site commissioning in English for projects outside China.
Total gaseous mercury CEMS for waste incineration, cement and power plants.
Non-contact measurement for chlor-alkali and chemical plants.
Open-path benzene, toluene, ethylbenzene and xylene monitoring.
TDLAS measurement at SCR outlet for reagent dosing control.
Continuous stack measurement for carbon accounting and MRV.
Certified CEMS packages for projects outside China.
DOAS (Differential Optical Absorption Spectroscopy) measures gas concentrations across an open light path. The analyser and the electronics stay outside the duct or the measured air volume, so dust, high temperature, moisture and corrosive gases do not contact the measurement hardware.
| Item | In-situ DOAS | Extractive CEMS |
|---|---|---|
| Contact with sample | None — light only | Probe, heated line, pump, filter |
| Corrosion by Cl₂, HCl, HF | Not applicable | Requires heated, corrosion-resistant path |
| Multi-component | Several gases from one analyser | Several analysers or converters |
| Response | Seconds, no sample transport delay | Limited by sample line volume |
| Calibration | Typically one gas calibration per year | More frequent checks of sampling system |
OPSIS systems are type-approved to EN 15267 and carry TÜV QAL1 and MCERTS certification, together with CE conformity, China CCEP and class-society approvals for marine systems.
Who is the OPSIS distributor in China?
AJOPSIS is the brand of Guangzhou A.Johnson Environmental Technical Co., Ltd., the authorized distributor of OPSIS AB (Sweden) in China. The company handles sales, engineering, commissioning and service. Contact: +86-21-52361751, info@ajopsis.com.
What can one DOAS analyser measure?
UV-DOAS covers SO₂, NO, NO₂, O₃, NH₃, BTEX, formaldehyde and elemental mercury. FTIR-DOAS covers HCl, HF, CO, CO₂, CH₄, N₂O and TOC. One analyser can serve several measurement paths through optical multiplexing.
Is the equipment accepted outside China?
Yes. OPSIS systems hold TÜV QAL1 (EN 15267), MCERTS, EPA and class-society approvals, which are the certifications most often requested by overseas owners and EPC contractors.
Send the gases, ranges, duct or path dimensions and required certification — we will respond with a technical proposal.