Gas Data GFM 226

Gas Data GFM 226 is engineered as a highly sensitive, portable CO₂ analyser for enclosed or hard-to-reach spaces. By tracking low-level CO₂ in ambient air, it detects subtle changes that can indicate human presence, poor ventilation or an emerging atmospheric risk. With the optional O₂ sensor fitted, it also monitors reduced oxygen levels, providing an additional safeguard when assessing whether an area is safe to enter or may be concealing occupants.

An infrared NDIR CO₂ sensor delivers fast response, fine resolution and repeatable readings across the instrument’s working range. This combination supports both quick spot checks and more systematic screening, helping operators make confident, evidence-based decisions in time-critical situations.

The GFM 226 is widely deployed by police, border security, immigration agencies, prison services, military units and other security organisations where direct visual inspection is limited or impossible. By sampling air from vehicles, containers, ship holds and similar enclosed volumes, it highlights abnormal CO₂ and O₂ patterns that may indicate hidden persons or stowaways.

Fire and rescue services and search & rescue teams also use the instrument to assess atmospheres in compartments, voids and sealed spaces before committing personnel. This supports safer entry decisions, helps to prioritise search areas and reduces the risk of exposing crews to unseen gas-related hazards.

Beyond specialist security work, Gas Data GFM 226 is a practical tool for routine pre-entry checks in tanks, chambers, vessels and other confined spaces. By confirming that CO₂ remains controlled and oxygen is not depleted, it supports more robust work permits and improves confidence that internal atmospheres are suitable for personnel.

In everyday workplaces such as offices, warehouses, retail environments, hospitality venues and manufacturing sites, the instrument can be used for indoor air quality and ventilation spot checks. Its ability to support assessment against recommended CO₂ thresholds for good ventilation makes it well suited to occupational hygiene programmes and ongoing responses to COVID-19-related ventilation guidance.

Compact, lightweight and shaped to fit comfortably in one hand, Gas Data GFM 226 travels easily on patrols, inspections and emergency call-outs. The robust, field-ready construction is complemented by a weather-resistant protective case, supplied in leather or neoprene, to help protect against knocks, dust and splashes in routine site use.

A high-contrast, backlit LCD display maintains clear visibility in vehicle holds, ship compartments and low-light operations. Combined with intuitive, ergonomic controls, this enables discrete use during sensitive security activities where minimising attention to equipment is important.

The instrument is designed for rapid deployment. Simple start-up and an intuitive interface mean new users can begin taking measurements with minimal training, which is particularly valuable for rental fleets and shared equipment pools. Once on the sampling screen, a built-in pump automatically draws air to the sensors, ensuring consistent, repeatable sampling without manual effort.

The standard kit includes a sample pipe of around one metre with a dust-trap filter to protect the sensor from particulates, providing a dependable configuration for most checks. For more challenging locations, a range of specialist probes and accessories is available. Straight needle probes, under-door probes and one-metre lance probes enable sampling in narrow gaps, beneath doors, through seals or into deep spaces where direct access is not possible or is unsafe. Additional accessories support exhaust or bag sampling and other remote sampling scenarios.

In combination, the portable form factor and flexible sampling options allow atmospheres to be assessed where the operator cannot safely reach or where access would be time-consuming, high-risk or operationally sensitive.

Gas Data GFM 226 uses a user-swappable, user-replaceable battery pack that typically provides 8–12 hours of continuous operation on a full charge, supporting full shifts or inspection campaigns. A typical recharge time of around four hours helps limit downtime between deployments, while the ability to keep spare battery packs on hand supports longer or remote operations.

A mains charger configured for the country of use is supplied as standard, keeping charging straightforward and avoiding the need for additional adapters in most situations.

Where documented evidence of conditions is required, the optional data logging function records CO₂ and, where fitted, O₂ measurements over time. Data is transferred to a PC via USB and managed using compatible software such as Instrument Connect or SiteMan, which can also handle sample-point labels to streamline reporting.

Logged data is easily exported in CSV format for integration into inspection reports, incident records and trend analyses. This makes the GFM 226 well suited to occupational and environmental screening programmes, including those aligned with workplace ventilation policies and COVID-19-related guidance.

Calibration date and service status are clearly shown on the instrument home screen and on the associated certificate. An annual service and recalibration is recommended to maintain measurement performance and support internal audit or compliance requirements.

User-definable threshold alarms for CO₂ and O₂ allow the GFM 226 to be configured around site-specific safety limits or operational criteria. Audible or visual alarms bring attention to unsafe or abnormal readings, whether that indicates a potentially hazardous atmosphere, inadequate ventilation or unexpected gas patterns that may signal hidden occupants during security screening.

The instrument is supplied as a ready-to-go site kit, including analyser, sample pipe, charger, basic accessories and an electronic operation manual on a USB drive or similar medium. This shortens setup time, reduces training requirements for new users and supports rapid mobilisation of teams. Spare parts and consumables are readily available through distributors or the manufacturer, helping keep fleets operational and simplifying long-term support.

With a field-proven design used worldwide across multiple industries and agencies, Gas Data GFM 226 provides a reliable, versatile solution for routine monitoring and special operations wherever fast, portable CO₂ and O₂ screening is required.