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Products · MAX Series · Premium
The premium gateway in our range, built for India’s pollution-control mandate — simultaneous transmission to CPCB and State Pollution Control Board (SPCB) servers, LAN-to-4G failover, and an inbuilt logger that back-fills delayed data. Built on the WT460M, our flagship MAX Series gateway, and available in MAX Series only.
The Central Pollution Control Board (CPCB) is India’s apex statutory pollution-control body — constituted in 1974 under the Water Act and working under the Ministry of Environment, Forest and Climate Change. In February 2014, CPCB issued directions under the Water and Air Acts requiring the 17 categories of highly polluting industries — plus CETPs, STPs and common waste incinerators — to install Online Continuous Effluent/Emission Monitoring Systems (OCEMS) and stream their emission and effluent data to the regulators in real time, 24×7. If a parameter crosses its limit, the central software alerts the industry, the State Pollution Control Board (SPCB) and CPCB automatically. Every state has its own board — for Tamil Nadu units the SPCB is TNPCB — and the data must reach both the state board and CPCB.
This is not optional instrumentation. For units commissioned after February 2017, a working OCEMS connection is a condition of the Consent to Operate; for existing units, boards were directed to issue closure directions where OCEMS was missing — powers that extend to stopping a plant’s electricity and water supply.
The analyzers measure — but compliance is decided by whether the data actually reaches the regulators. CPCB’s guidelines and portal API set precise requirements for the transmission side:
A data gap means the regulator’s server did not receive a packet for a timestamp — a transmission failure, not a pollution event. Yet it lands on the industry: CPCB has issued closure and show-cause notices to over a thousand units for missing OCEMS data, including failures caused purely by lost connectivity. Extended gaps can escalate to stop-operation orders. Independent studies have found real-world data availability running well below the 85% requirement across states and sectors — and connectivity is a failure mode you can actually engineer away.
Your compliance is only as strong as the weakest link between your analyzers and the CPCB server. One connectivity path is a single point of failure; a gateway with failover and a logger removes it.
Analyzers stream into the gateway over RS-485 Modbus and 4-20 mA. The gateway delivers every timestamped reading to the regulators — one encrypted push to the new central portal, or a parallel push where your state board takes a direct feed — normally over the wired LAN / leased-line path. Watch what happens when that path fails: the 4G path takes over in seconds, and if both are ever down, the inbuilt logger holds every reading and back-fills it as delayed data. The 85% availability number stays protected through all of it.
Today: one encrypted push to the CPCB portal covers both regulators, and the same stream can also feed your own SCADA or cloud portal. The direct SPCB fork shown is in development for states that take their own feed. Either way, when the LAN chip goes red the same packets ride the 4G path — the regulators never see a gap. Total loss of both paths hands over to the logger (see the Store & Forward guide).
Along with the regulator push, the gateway can send the same data to your own SCADA / client server — your operations team sees exactly what the regulator sees.
A single 4-20 mA sensor connects directly to the inbuilt IO channel — no external card required. Need more channels? The WT36I analog input card adds 6 channels on the same bus.
The CPCB Gateway is a WT460M configured for the OCEMS role — same industrial hardware, provisioned for regulator push, failover and delayed-data logging. Wiman has already integrated the new CPCB portal’s API in a live deployment — encrypted signature authentication, device and station IDs, and the full registration flow (portal sign-up, station and analyzer details, device tokens) handled during commissioning.
The 17 mandated categories of highly polluting industries, plus common treatment and incineration facilities:
Every reading carries a parameter key and a unit key — exact strings, no variants. Wrong key, no data. Each row below is marked confirmed or unverified: check the badge before you copy. Search the list or filter by analyser type.
Unofficial integrator reference — not a CPCB publication, and Wiman is not affiliated with or appointed by CPCB. Rows marked confirmed appear verbatim in CPCB’s published RTDMS REST API v1.0 annexure (Tables 5.0 and 6.0). Rows marked unverifiedwere transcribed from CPCB portal screens and appear in no public CPCB document — confirm those on your device’s registration page before sending them. Unit shows the sendable unit key, not the printed unit; a dash means CPCB publishes no unit key for that measurand. The Typecolumn is our own grouping. Your device’s page on the CPCB portal is authoritative in all cases.
| Parameter | Key | Unit | Type |
|---|---|---|---|
| Emission Flow | flow_emissionunverified | m3/hr | Flow |
| Flow / Flow Outlet | flowconfirmed | m3/hr | Flow |
| Flow Back Water | flow back waterunverified | m3/hr | Flow |
| Flow Inlet | flow_inletconfirmed | m3/hr | Flow |
| Flow Volume | flow_totalizerconfirmed | — | Flow |
| Flow_inlet_totalizer | flow_inlet_totalizerconfirmed | — | Flow |
| Gas Flow | gasunverified | m3/hr | Flow |
| Inlet FLow2 | inlet flow2confirmed | m3/hr | Flow |
| Inlet Flow2 Totalizer | inlet flow2 totalizerunverified | — | Flow |
| Totalizer | totalizerunverified | — | Flow |
| Velocity | velocityconfirmed | m/s | Flow |
| CL | clconfirmed | mg/Nm3 | Flue Gas |
| CL2 | cl2unverified | mg/Nm3 | Flue Gas |
| CO | coconfirmed | mg/Nm3 | Flue Gas |
| CO2 | co2confirmed | % | Flue Gas |
| CS2 | cs2unverified | mg/Nm3 | Flue Gas |
| H2S | h2sconfirmed | mg/Nm3, ppm | Flue Gas |
| HC | hcconfirmed | mg/Nm3 | Flue Gas |
| HCL | hclconfirmed | mg/Nm3 | Flue Gas |
| HCN | hcnconfirmed | mg/Nm3, ppm | Flue Gas |
| HF | hfconfirmed | mg/Nm3 | Flue Gas |
| Nitrogen Dioxide | no2confirmed | mg/Nm3 | Flue Gas |
| Nitrogen Oxide | noconfirmed | mg/Nm3 | Flue Gas |
| Nitrogen Oxides | noxconfirmed | mg/Nm3 | Flue Gas |
| O2 | o2confirmed | % | Flue Gas |
| O3 | o3unverified | mg/Nm3 | Flue Gas |
| Opacity | opacityconfirmed | % | Flue Gas |
| Phosgene(COCl2) | cocl2confirmed | mg/Nm3 | Flue Gas |
| PM | pmconfirmed | mg/Nm3 | Flue Gas |
| SO2 | so2confirmed | mg/Nm3 | Flue Gas |
| SO2 PPM | so2_ppmunverified | ppm | Flue Gas |
| SOX | soxconfirmed | mg/Nm3 | Flue Gas |
| THC | thcunverified | mg/Nm3 | Flue Gas |
| THC | total hydrocarbon content(thc)unverified | mg/Nm3 | Flue Gas |
| TVOC | tvocconfirmed | mg/Nm3 | Flue Gas |
| VCM | vcmconfirmed | ppm | Flue Gas |
| VOC | vocunverified | mg/Nm3 | Flue Gas |
| Acid Mist | acid_mistunverified | mg/Nm3 | Gas Detector |
| an | anunverified | ppm | Gas Detector |
| Benzene | benzeneconfirmed | mg/Nm3 | Gas Detector |
| H2O | h2oconfirmed | % | Gas Detector |
| HG | hgunverified | mg/Nm3, mg/l | Gas Detector |
| Arsenic | asconfirmed | mg/l | Heavy Metals |
| Arsenic Concertration | arsenicunverified | mg/l | Heavy Metals |
| Chromium Concentration | chromiumconfirmed | mg/l | Heavy Metals |
| CR6 | cr6unverified | mg/l | Heavy Metals |
| Mercury | mercuryconfirmed | mg/Nm3, mg/l | Heavy Metals |
| Nickle Concentration | niunverified | mg/l | Heavy Metals |
| Total Chromium | total_chromiumunverified | mg/l | Heavy Metals |
| Ammonia | ammoniaconfirmed | mg/l | Nitrogen |
| Ammoniacal Nitrogen Concentration | ammonical_nitrogenconfirmed | mg/l | Nitrogen |
| NH3-N | nh3-nunverified | mg/l | Nitrogen |
| NH4 | nh4unverified | mg/l | Nitrogen |
| NH4-N | nh4-nconfirmed | mg/l | Nitrogen |
| Nitrate as Nitrogen | no3-nconfirmed | mg/l | Nitrogen |
| NO3 | no3unverified | mg/l | Nitrogen |
| TN | tnunverified | mg/l | Nitrogen |
| Total Nitrogen | total_nitrogenunverified | mg/l | Nitrogen |
| Oil & Grease | oil_greaseconfirmed | mg/l | Organic |
| Oil-in-Water | oil in waterunverified | mg/l | Organic |
| Phenol Concentration | phenolconfirmed | mg/l | Organic |
| TC | tcconfirmed | mg/l | Organic |
| TOC | tocconfirmed | mg/l | Organic |
| Toc | toc_effluentunverified | mg/l | Organic |
| Pressure | pressureunverified | — | Pressure |
| Env Temp | temperatureconfirmed | celsius | Temperature |
| PRIMARY TEMPERATURE | primary_temperatureconfirmed | celsius | Temperature |
| Sec. Temp | secondary_temperatureconfirmed | celsius | Temperature |
| Temperature for Effluent | ef_temperatureconfirmed | celsius | Temperature |
| Temperature for Emission | em_temperatureconfirmed | celsius | Temperature |
| Ammonium | ammoniumconfirmed | mg/l | Water |
| AOx Concertration | aoxconfirmed | mg/l, mg/Nm3 | Water |
| BOD | bodconfirmed | mg/l | Water |
| Chlorine(Effluent) | chlorineunverified | mg/l | Water |
| COD | codconfirmed | mg/l | Water |
| Color | colorconfirmed | — | Water |
| Conductivity | conductivityconfirmed | — | Water |
| Cyanide | cyanideconfirmed | mg/l | Water |
| Cyanide ion | cn-confirmed | mg/l | Water |
| Cynide Concentration | cynideunverified | mg/l | Water |
| Dissolved Oxygen | doconfirmed | mg/l | Water |
| Electrical Conductivity | ecunverified | — | Water |
| Fluoride Concentration | fluorideconfirmed | mg/l | Water |
| Fluoride Concentration | fluoride_effluentunverified | mg/l | Water |
| NH3 | nh3_effluentunverified | mg/l | Water |
| pH | phconfirmed | ph | Water |
| Phosphates Concentration | phosphatesconfirmed | mg/l | Water |
| Phosphorous | phosphorousunverified | mg/l | Water |
| Sulphide | sulphideunverified | mg/l | Water |
| TDS | tdsconfirmed | mg/l | Water |
| TSS | tssconfirmed | mg/l | Water |
h2s is mg/Nm3 on a stack, ppm on a gas detector.inlet flow2 really does contain a space. Anything marked unverified — confirm on your device page first.If CPCB asks us to change or remove this table, we will. Spotted something off? Tell us.
OCEMS (Online Continuous Effluent/Emission Monitoring Systems) is mandated by India's Central Pollution Control Board through its February 2014 directions: the 17 categories of highly polluting industries — plus CETPs, STPs and common waste incinerators — must stream emission and effluent data to CPCB and their State Pollution Control Board in real time, 24x7. For new units it is a Consent-to-Operate condition; non-compliance can attract closure directions.
Both regulators must see the data, but how depends on the architecture. On CPCB's new central portal (cems.cpcb.gov.in) the industry pushes once and the platform shares the data with the State Pollution Control Board. Where a state board operates its own server (each state has one — for Tamil Nadu it is TNPCB), the guidelines require a simultaneous direct push to both. The Wiman CPCB Gateway is integrated and deployed on the new central portal today; direct SPCB server transmission is in active development for states that require their own feed.
CPCB guidelines require at least 85% data availability and support delayed-data submission: readings buffered during an outage must be uploaded marked as delayed data, with their original timestamps. The CPCB Gateway does this automatically — its inbuilt logger stores every reading and back-fills the server history when connectivity returns.
A data gap is a compliance failure even when the plant is running clean — CPCB has issued show-cause and closure notices to units whose data stopped flowing due to connectivity loss. A dual-path gateway (wired LAN/leased line primary with automatic 4G failover) removes the single point of failure, and the inbuilt logger covers the case where both paths fail.
CEMS and effluent analyzers typically expose readings over RS-485 Modbus RTU or 4-20 mA outputs. The CPCB Gateway polls Modbus analyzers directly as an RS-485 master. A single 4-20 mA sensor connects directly to the gateway's inbuilt IO channel with no external card; for more channels the WT36I analog input card adds 6 channels on the same bus.
Yes — alongside the regulator push, the gateway can deliver the same timestamped readings to your own SCADA or cloud portal, so plant operations always sees exactly what the regulator sees.
No. OCEMS is the Online Continuous Emission/Effluent Monitoring System — live analyzer data streaming to the regulators, which is what this gateway does. OCMMS is the Online Consent Management and Monitoring System — the portal for Consent to Establish / Consent to Operate applications, renewals and fees. The gateway serves OCEMS; consent applications go through OCMMS separately.
The Wiman WT460M — the flagship MAX Series industrial gateway with Ethernet plus 4G LTE dual upstream, automatic failover, dual-server push, HTTPS/SSL transport, an inbuilt FIFO data logger and support for up to 3,000 field tags on a DIN-rail form factor.