Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261 Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261

Vaisala MGP262 Biogas Methane and Carbon Dioxide Multigas Probe

Vaisala MGP262 Methane and Carbon Dioxide Multigas Probe

The Vaisala MGP262 continuously measures methane slip and carbon dioxide in offgas from biomethane-upgrading processes. Its in-situ design provides direct, always-on measurement without a separate sampling system.

  • Optimised for low-level methane measurement in CO2-rich offgas
  • CH4 measurement range from 0–5 vol-%
  • CO2 measurement range from 0–100 vol-%
  • Heated optical measurement for demanding and humid process conditions
  • Three isolated 4–20 mA outputs and RS-485 Modbus RTU
  • Ex-certified construction for direct installation in hazardous process areas

Ask Seacom about the MGP262

Continuous Methane-Slip Measurement for Biomethane Upgrading

The Vaisala CARBOCAP® MGP262 is designed for direct measurement of methane and carbon dioxide in the offgas stream of a biogas-upgrading plant. It focuses on the low methane concentrations that indicate valuable biomethane is escaping with the carbon-dioxide-rich offgas.

Continuous in-line measurement gives operators immediate process feedback. The upgrading system can be adjusted using actual offgas composition instead of relying only on periodic samples, helping improve biomethane recovery, reduce avoidable methane emissions and document process performance.

For upgrading offgas, not raw biogas

The MGP262 has a 0–5 vol-% methane range and is optimised for CO2-rich offgas from biomethane upgrading. For raw biogas with substantially higher methane concentration, or when humidity measurement is required, select the Vaisala MGP261.

Process analyser, not a gas-leak alarm

The MGP262 is an in-line process instrument for gas-composition measurement. It is not an ambient combustible-gas detector or a personnel-safety alarm. Use a dedicated fixed gas-detection system for room or plant-area safety monitoring.

Measurement Performance

ParameterMeasurement rangeAccuracy at +25 °C and 1013 hPaRepeatability
Methane, CH4 0–5 vol-% 0–2 vol-%: ±0.1 vol-% CH4
2–5 vol-%: ±5% of reading		 Better than ±0.1 vol-% at 1 vol-% CH4
Carbon dioxide, CO2 0–100 vol-% 90–100 vol-%: ±1 vol-%
0–90 vol-%: ±2 vol-%		 ±0.4 vol-% at 95 vol-% CO2
Start-up and response 30-second start-up, approximately 2-minute warm-up and 90-second T90 with the standard PTFE filter
Flow-through response 90-second T90 at ≥0.5 L/min; recommended flow 0.5–1 L/min

The published accuracy applies under defined reference conditions, includes temperature and pressure compensation and excludes cross-gas interference. Correct compensation settings and a representative measurement point are important to overall system performance.

Why Measure Methane in the Offgas?

Operational concernWhat the MGP262 showsHow the data can be used
Biomethane loss Continuous CH4 concentration in the offgas stream Adjust the upgrading process to improve product-gas recovery
Greenhouse-gas emissions Actual methane slip instead of an assumed value Support emissions monitoring, reporting and reduction work
Process drift Changes in methane and carbon-dioxide concentration over time Identify deteriorating separation performance earlier
RTO operation Methane level upstream of regenerative thermal oxidation Provide process information for the selected offgas-treatment arrangement

Outputs and System Integration

Power supply 18–30 VDC; typical consumption 3 W, maximum 6 W
Analogue outputs Three isolated and scalable 4–20 mA channels; maximum load 500 Ω
Digital communication RS-485 with Modbus RTU
External compensation input Optional intrinsically safe 4–20 mA input for an external pressure or temperature sensor
Configuration and diagnostics Vaisala Insight PC software through the optional RS-485-to-USB configuration cable

Operating and Mechanical Details

Process temperature 0 to +60 °C
Ambient temperature −40 to +60 °C
Process pressure range −500 to +500 hPa
Process flow range 0–20 m/s
Process connection 1.5-inch male NPT
Mechanical pressure tolerance 20 bar(g); this is not the permitted measurement operating-pressure range
Ingress protection IP66
Probe materials AISI 316L stainless steel, PPS and sintered PTFE filter
Weight Approximately 3 kg

Vaisala MGP262 or MGP261?

ProbeBest suited toMeasured parametersKey distinction
MGP262 Biomethane-upgrading offgas and methane-slip monitoring CH4 0–5% and CO2 0–100% Low methane range for measuring losses in CO2-rich offgas
Vaisala MGP261 Raw biogas production and CHP feed-gas monitoring CH4 0–100%, CO2 0–100%, H2O 0–25% or dew point Full-range methane measurement with an additional humidity channel

Installation Options

ArrangementWhen it fitsPlanning point
Direct in-situ installation Continuous measurement directly in a suitable offgas pipeline Confirm the 1.5-inch NPT connection, pressure, temperature, orientation and maintenance clearance
Ball-valve installation Applications requiring probe isolation and removal through an approved valve arrangement Review valve dimensions, insertion clearance and hazardous-area work procedures
Flow-through adapter Bypass or sample-flow measurement where direct insertion is unsuitable Recommended flow is 0.5–1 L/min; keep the sample representative of the process

Typical Applications

  • Methane-slip monitoring in membrane upgrading systems
  • Pressure-swing adsorption and water-scrubbing process optimisation
  • Offgas measurement before regenerative thermal oxidation
  • Biomethane recovery and upgrading-efficiency monitoring
  • Continuous methane-emissions measurement in CO2-rich process gas
  • Performance testing and commissioning of biogas-upgrading equipment

Hazardous-Area Planning

The MGP262 is available with hazardous-area certifications that support a probe section in Zone 0 and an external section in Zone 1 under the specified installation conditions. Certification markings and permitted ambient conditions vary by region and product version. Check the applicable certificate, control drawing, cable-entry method, power arrangement and local hazardous-area requirements before ordering or installation.

Vaisala MGP262 Videos

Vaisala MGP262 Supplier and Technical Support in Malaysia

Seacom Process Instruments supplies and supports the Vaisala MGP262 Methane and Carbon Dioxide Multigas Probe in Malaysia. Our team can help review the methane range, offgas composition, measurement point, process connection, hazardous-area requirement, output configuration and control-system integration.

Send us your upgrading process, expected methane slip, carbon-dioxide concentration, operating pressure and temperature, pipeline details, Ex classification and required outputs. We will help you check whether the MGP262, MGP261 or another measurement arrangement is the better fit.

Ask Seacom about your biomethane offgas measurement

Download

  MGP262 Catalogue   (314.15k)

  MGP262 Order Form   (201.39k)


Specific References

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Ask Seacom about the MGP261

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Ask Seacom about the MGP261

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