Gases Detection

Industrial Gas Detection and CO2 Measurement

Seacom Process Instruments supplies gas detection, gas measurement and alarm systems for commercial buildings, laboratories, refrigeration plants, industrial processes, biogas facilities and environmental monitoring applications.

The correct instrument depends on the target gas, concentration range, installation location, required alarm response and system interface. A process gas analyser and a personnel-safety gas detector perform different duties and must not be treated as interchangeable.

Gas Detection and Measurement Solutions

  • Fixed gas detection: Continuous monitoring of combustible, toxic, refrigerant and oxygen-related hazards with local or central alarms.
  • Carbon dioxide measurement: Room, duct, incubator, process and outdoor CO2 probes and transmitters.
  • Biogas measurement: In-situ methane, carbon dioxide and humidity measurement for raw biogas and biomethane-upgrading processes.
  • Refrigerant leak detection: Gas-specific monitoring for refrigeration machinery rooms, cold rooms and HVAC installations.
  • Air-quality monitoring: Multi-pollutant outdoor stations for gases, particulate matter and environmental parameters.
  • System integration: Analogue outputs, relays, RS-485 and Modbus options for alarm panels, PLCs, ventilation controls and building-management systems.

Selecting the Right Gas Detection Product

ApplicationRecommended productWhy it fits
Fixed combustible, toxic or refrigerant gas detection MSR Fixed Gas Detection and Alarm System Gas-specific detectors, scalable controllers, alarms and building-system integration for commercial and industrial sites.
Room CO2, humidity and temperature monitoring Vaisala GMW80 Series Wall-mounted measurement for demand-controlled ventilation and indoor environmental monitoring.
High-performance room CO2, humidity and temperature measurement Vaisala GMW90 Series Flexible room transmitters for applications requiring dependable measurements and multiple configuration options.
Ventilation-duct CO2 measurement Vaisala GMD110 Designed for direct duct installation in ventilation and building-automation applications.
ppm-level CO2 measurement in agriculture, HVAC and OEM systems Vaisala GMP252 Compact probe for ppm-level carbon-dioxide measurement in demanding applications.
Percentage-level CO2 measurement Vaisala GMP251 Suitable for higher carbon-dioxide concentrations in process, life-science and controlled-environment applications.
CO2 measurement in incubators Vaisala GMP231 Purpose-built for incubator conditions, including elevated temperature, humidity and CO2 concentration.
Outdoor and ecological CO2 measurement Vaisala GMP343 Field-oriented carbon-dioxide probe for ecological, soil and ambient measurement arrangements.
Raw biogas composition and humidity Vaisala MGP261 Measures methane, carbon dioxide and water vapour directly in wet raw biogas.
Methane slip in biomethane-upgrading offgas Vaisala MGP262 Optimised for low-level methane measurement in carbon-dioxide-rich offgas.
Outdoor multi-pollutant air-quality monitoring Kunak AIR Pro Configurable station for continuous monitoring of selected gases, particles and environmental conditions.

Information Required for Correct Selection

  • Target gas: State the exact gas or refrigerant designation; one sensor does not detect every gas.
  • Measurement purpose: Define whether the instrument is for personnel safety, leak detection, ventilation control, process measurement or environmental monitoring.
  • Range and units: Confirm the expected normal concentration, alarm levels and required units such as ppm, vol-% or %LEL.
  • Installation conditions: Provide temperature, humidity, pressure, airflow, washdown exposure and whether the area is hazardous.
  • Detector placement: Consider possible leak sources, gas density, room geometry, ventilation and occupied areas.
  • Alarm response: Define warning levels, sounders, beacons, ventilation, shutdowns, latching and reset requirements.
  • Outputs and integration: Specify relay, 4–20 mA, RS-485, Modbus, PLC or building-management-system requirements.
  • Maintenance: Plan access for calibration, bump testing, sensor replacement and periodic functional checks.

Typical Applications

  • Refrigeration and chiller machinery rooms
  • Laboratories, hospitals and gas-cylinder storage areas
  • Boiler rooms, parking facilities and industrial process plants
  • Food, beverage, fermentation and controlled-atmosphere facilities
  • Greenhouses, incubators and demand-controlled ventilation systems
  • Biogas production and biomethane-upgrading plants
  • Outdoor air-quality and environmental research stations

Gas Detection Supplier and Technical Support in Malaysia

Seacom Process Instruments can assist with product selection, measurement-point review, controller sizing, alarm architecture, system integration, installation and maintenance planning. Send us the target gas list, expected concentration, site layout, possible leak sources, operating conditions, alarm actions and required outputs for an application review.

Gases Detection

Active filters

Kunak Air Quality Sensor

Kunak Air Quality Sensor

The Kunak AIR Pro is a high-performance, sensor-based air quality monitoring station engineered for precise, real-time, multi-pollutant environmental assessment. Awarded Most Accurate Multi-Pollutant Sensor in the AIRLAB Microsensors Challenge, it delivers near-reference data quality for cities, heavy industries, researchers and smart-city infrastructure.

Vaisala Temperature and Humidity Logger VDL200

Vaisala VDL200 PoE Data Logger for viewLinc CMS

The Vaisala VDL200 is a secure Power-over-Ethernet data logger for monitoring temperature, relative humidity, carbon dioxide and analog or Boolean inputs in controlled and GxP-regulated environments.

Designed for the Vaisala viewLinc Continuous Monitoring System, the VDL200 combines interchangeable smart probes, onboard memory and battery backup to provide reliable, gap-free environmental monitoring.

Vaisala Transmitter Indigo300

Vaisala Indigo300 Industrial Transmitter

The Vaisala Indigo300 is a rugged industrial transmitter for one Vaisala Indigo-compatible smart probe, providing local measurement display and up to three configurable analog outputs.

Its corrosion-resistant IP66 metal enclosure, flexible probe mounting and interchangeable probe design make Indigo300 suitable for humidity, temperature, dew point, CO2, moisture in oil and other demanding industrial measurements.

Duct Mounted CO2 Transmitter GMD10

Vaisala GMD110 High-Accuracy Duct CO₂ Transmitter

The Vaisala GMD110 measures carbon dioxide directly inside ventilation ducts for precise HVAC control and demand-controlled ventilation.

  • CO₂ measurement range from 0 to 10,000 ppm
  • Accuracy of ±40 ppm from 0 to 3000 ppm
  • 4–20 mA, 0–5 V, 0–10 V or Modbus RTU output options
  • Analogue scaling of 0–2000, 0–5000 or 0–10,000 ppm
  • Fast response with less than two minutes to full specification
  • Heated CARBOCAP® sensor head helps prevent condensation
  • IP65 enclosure for demanding duct installations
  • Traceable calibration certificate included
Long Range Wireless Data Logger (CMS, FDA Approved) RFL100

Vaisala RFL100 Wireless Data Logger and AP10 Access Point

The Vaisala RFL100 uses secure, long-range VaiNet wireless technology to monitor temperature, relative humidity and carbon dioxide with the AP10 Access Point and viewLinc Continuous Monitoring System.

  • At least 50 m typical indoor wireless range
  • Up to 32 RFL100 data loggers per AP10
  • 30 days of local measurement memory
  • Approximately 18 months of battery operation for temperature and humidity monitoring
Vaisala CO₂ Probe GMP343

Vaisala GMP343 CO₂ Probe for Outdoor and Ecological Measurement

The Vaisala GMP343 is a rugged, high-accuracy carbon-dioxide probe for outdoor monitoring, ecological research, soil respiration, plant-growth chambers and demanding OEM applications.

  • Selectable CO₂ ranges from 0–1000 ppm to 0–2%
  • Diffusion-aspirated or flow-through sampling models
  • Accuracy up to ±(3 ppm + 1% of reading)
  • Temperature, pressure, humidity and oxygen compensation
  • RS-232, RS-485, 4–20 mA, 0–2.5 V or 0–5 V outputs
  • Raw and numerically filtered measurement data
  • IP67 probe housing with the cable connected
  • Compatible with MI70 for portable display and logging
CO₂, Humidity and Temperature Transmitter GMW80 series

Vaisala GMW80 Series CO₂, Humidity and Temperature Transmitters

The Vaisala GMW80 Series provides dependable, cost-efficient room measurement for demand-controlled ventilation and indoor air-quality applications.

  • CO₂ measurement ranges up to 2000 or 5000 ppm, depending on model
  • Temperature measurement from 0 to +50 °C on selected models
  • Optional relative-humidity measurement from 0 to 95 %RH
  • Voltage, current, relay, Pt1000 and Modbus RTU options
  • Display or colour CO₂ indicator available on selected models
  • Stable Vaisala CARBOCAP® technology for continuously occupied buildings
  • Quick installation with correct CO₂ readings immediately after start-up
Vaisala Handheld CO₂ Meter GM70

Vaisala GM70 Handheld CO₂ Meter – Discontinued

The Vaisala GM70 was a portable carbon-dioxide meter for diffusion measurements, pump sampling, data logging and field checking fixed CO₂ instruments.

  • Discontinued product; not recommended for new purchases
  • GMP221 probes for percentage-level CO₂ up to 20%
  • GMP222 probes for ppm-level CO₂ up to 10,000 ppm
  • GMH70 diffusion handle or GM70PUMP sampling system
  • MI70 indicator with numerical, graphical and logging functions
  • Used for field checking compatible fixed Vaisala CO₂ instruments
  • Use Vaisala Indigo80 for new portable measurement systems
Duct Mounted CO2 Transmitter GM20

Vaisala GMD20 Duct-Mounted CO₂ Transmitter – Discontinued

The Vaisala GMD20 Series was designed for carbon-dioxide measurement inside ventilation ducts and demand-controlled ventilation systems.

  • Discontinued legacy product; not recommended for new projects
  • Nominal CO₂ measurement range from 0 to 2000 ppm
  • GMD20 without display and GMD20D with local display
  • 0–20 mA, 4–20 mA and 0–10 V analogue outputs
  • Optional relay or LonWorks® interface on applicable configurations
  • IP65 electronics enclosure for duct installations
  • Use Vaisala GMD110 for new installations
Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261

Vaisala MGP262 Biogas 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

Biogas Methane, Carbon Dioxide and Humidity Multigas Probe MGP261

Vaisala MGP261 Biogas Methane, Carbon Dioxide and Humidity Probe

The Vaisala MGP261 measures methane, carbon dioxide and humidity directly in raw biogas. Its in-situ design avoids a separate sampling system and helps operators monitor gas quality while protecting downstream equipment.

  • Measures CH4, CO2 and water vapour in one probe
  • 0–100 vol-% measurement range for methane and carbon dioxide
  • Humidity output as 0–25 vol-% H2O or −10 to +60 °C dew point
  • Heated optics help prevent condensation in wet biogas
  • 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 MGP261

CO2, Temperature and Humidity Transmitter Series GMW90

Vaisala GMW90 Series CO₂, Temperature and Humidity Transmitters

The Vaisala GMW90 Series provides stable wall-mounted carbon-dioxide and temperature measurement, with optional humidity, for demanding HVAC and building-automation applications.

  • Carbon-dioxide measurement from 0 to 5000 ppm
  • CO₂ accuracy up to ±(30 ppm + 2% of reading)
  • Temperature measurement from −5 to +55 °C
  • Optional HUMICAP® relative-humidity measurement from 0 to 95 %RH
  • Voltage, current or Modbus RTU output models
  • Display and CO₂ status-indicator options
  • Field-exchangeable calibrated measurement modules
  • Traceable three-point CO₂ calibration certificate included
Incubator CO₂ Probe GMP231

Vaisala GMP231 CO₂ Probe for Incubators

The Vaisala GMP231 is an OEM carbon-dioxide probe designed for accurate measurement and permanent wall installation in life-science incubators.

  • CO₂ measurement range from 0 to 20%
  • Measurement performance optimized around 5% CO₂
  • Sensor head withstands heat sterilisation at +180 °C
  • At least 120 specified +180 °C sterilisation cycles
  • Internal temperature and pressure measurement for compensation
  • Heated sensor head helps prevent condensation
  • I²C, Vaisala RS-485 protocol and scalable 0–20 mA options
  • Four-point traceable CO₂ calibration certificate included
CO₂ Probe GMP252

Vaisala GMP252 PPM-Level CO₂ Probe

The Vaisala GMP252 is an intelligent standalone probe for stable ppm-level carbon-dioxide measurement in demanding HVAC, refrigeration, agriculture and industrial applications.

  • CO₂ measurement range from 0 to 10,000 ppm
  • Measurement up to 30,000 ppm with reduced accuracy
  • Accuracy of ±40 ppm from 0 to 3000 ppm
  • Compensation for temperature, pressure, humidity and oxygen
  • Heated sensor head helps prevent condensation
  • 0–20 mA, 4–20 mA, 0–5 V, 0–10 V and RS-485 output options
  • Standalone Modbus RTU operation or connection to an Indigo transmitter
  • Compatible with Vaisala Indigo80 and Insight PC software
CO₂ Probe GMP251

Vaisala GMP251 Percentage-Level CO₂ Probe

The Vaisala GMP251 is an intelligent probe for stable percentage-level carbon-dioxide measurement in incubators, controlled-atmosphere storage and demanding industrial applications.

  • CO₂ measurement range from 0 to 20% CO₂
  • Accuracy of ±0.1% CO₂ at 5% CO₂
  • Compensation for temperature, pressure, humidity and oxygen
  • Heated sensor head helps prevent condensation
  • 0–20 mA, 4–20 mA, 0–5 V, 0–10 V and RS-485 output options
  • Standalone Modbus RTU operation or connection to an Indigo transmitter
  • Compatible with Vaisala Indigo80 and Insight PC software
  • IP65 probe body with traceable calibration certificate
Indigo200 Series Transmitters for Vaisala smart probes for Vaisala Smart Probes

Vaisala Indigo200 Series Transmitters

The Vaisala Indigo200 Series is the standard transmitter platform for one interchangeable Indigo-compatible smart probe, providing local display and practical automation-system connectivity.

  • Indigo201 with three analog outputs and two relays
  • Indigo202 with Modbus RTU and two relays
  • Colour display with numerical and graphical views
  • IP65 enclosure for industrial measurement applications
Vaisala Indigo510 Indigo520 Malaysia

Vaisala Indigo510 and Indigo520 Flagship Transmitters

The Vaisala Indigo500 Series provides flagship industrial measurement integration: choose Indigo510 for a simplified single-probe system or Indigo520 for full dual-probe capability.

  • Indigo510: one probe and two isolated analog outputs
  • Indigo520: two probes, four isolated outputs and two relays
  • Ethernet web interface and Modbus TCP communication
  • Rugged IP66 and NEMA 4 metal enclosure
Inficon Whisper Ultrasonic Leak Detector

Inficon Whisper Ultrasonic Leak Detector

The INFICON Whisper ultrasonic leak detector helps locate leaks by detecting ultrasonic sound. Its portable design supports troubleshooting and routine maintenance.

  • Locate leaks in compressed air and vacuum systems
  • Listen through headphones to help pinpoint the source
  • Adjust sensitivity to suit the inspection
  • Accessory options for machinery and enclosure checks
MSR MA-4 Freon and Refrigerant Gas Transmitter

MSR MA-4 Freon and Refrigerant Gas Transmitter

The MSR µ-Gard MA-4 is a fixed analogue transmitter for continuous monitoring of specified Freon and refrigerant gases in ambient air.

  • Refrigerant-specific leak-detection configuration
  • Suitable for chiller rooms, refrigeration plants and mechanical rooms
  • 4–20 mA or 0–10 V analogue output, depending on configuration
  • Compatible with suitable MSR gas controllers and automation inputs
  • Factory calibration for the selected refrigerant and measuring range
  • Detector location selected according to refrigerant density and leak source
  • Ask Seacom to confirm the correct refrigerant sensor
MSR ADT-23 Combustible Gas Transmitter

MSR ADT-23 Combustible Gas Transmitter

The MSR PolyGard ADT-23 is a fixed transmitter for continuous monitoring of combustible gases and vapours in ambient air.

  • Digital processing with temperature compensation
  • Gas- and range-specific sensor configuration
  • Selectable (0) 4–20 mA or (0) 2–10 V DC analogue output
  • RS-485 interface for compatible communication protocols
  • Optional two relays with adjustable switching thresholds
  • Calibration routine with controlled access
MSR Fixed Gas Detection and Alarm System

MSR Fixed Gas Detection and Alarm System

MSR gas detection systems continuously monitor combustible, toxic and refrigerant gases, generate local or central alarms and interface with ventilation, shutdown and building-management systems.

  • Gas-specific fixed detectors for commercial and industrial applications
  • Compact controllers for small systems and networked controllers for larger sites
  • Analogue, relay, RS-485 and Modbus integration options
  • Local displays, warning indicators, sounders and beacons
  • Solutions for general areas and certified hazardous areas
  • Applications include refrigeration plants, laboratories, garages and process facilities
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