ppb-Level Sensitivity Chemical Detection Instruments with Dual Micro-Drift Tube Architecture and IP67 Sealed Ion Mobility Spectrometry Detector

The MR-AIMS detects and identifies trace hazardous gases in ambient air. It uses Time-of-Flight Ion Mobility Spectrometry (TOF-IMS). The result is laboratory-grade discrimination in a unit one person can carry for a full shift.

Most gas sensors only show that a threshold was crossed. The MR-AIMS goes further. It resolves the mobility signature of a sample and matches it to an on-board library. The operator learns what the substance is, not just that something is present.

That difference drives every next decision. It sets the respirator, the exclusion zone, the decontamination route and the re-entry call.

The platform serves teams that cannot afford ambiguity: hazmat crews, customs officers, public-security units, refinery safety staff, fire investigators, environmental officers and public-health responders.

An internal pump draws air into the instrument. Molecules are ionised in a reaction region. A short ion pulse enters the drift tube. A weak electric field pulls it towards the detector.

Clean drift gas flows the other way. Large ions collide more often and arrive later. Small ions arrive sooner. The arrival pattern forms a mobility spectrum.

A reactant ion peak (RIP) is the internal reference. It normalises every other peak against shifts in temperature and pressure.

Mobility depends on mass, charge and collision cross-section. The spectrum therefore acts as a fingerprint. Resolving power is ≥28 on the RIP. Sharper peaks mean fewer overlaps between similar compounds.

Most handheld IMS units use one drift tube. They switch high-voltage polarity back and forth to scan positive and negative modes. Each switch costs time. A target in the un-scanned mode stays hidden until the cycle returns.

• Two micro drift tubes run at once, one per polarity.
• No switching dead time; both ion populations read in one cycle.
• Short drift path equilibrates and clears faster.
• Cross-checking channels cuts false alarms from humidity and solvents.
• Redundancy stabilises calibration over long shifts.
• The compact layout adds no size.

• ppb-level sensitivity warns well before concentrations turn dangerous.
• Alarm in roughly 15–30 s from sample intake.
• Library of 60+ toxic industrial chemicals and high-toxicity volatile compounds, expandable.
• Substances are named, not reported as an anonymous excursion.
• Audible and visual alarms together; eyes stay on the scene.
• IP67 sealed; rated −20 °C to +45 °C.
• About 1 kg with battery; up to 10 h per charge.

The table groups key targets by confirmed alarm time. Library contents can be tailored to your threat list or process.

Refineries, container yards and burning structures destroy bench analysers. The MR-AIMS housing is sealed against dust and temporary immersion. It can be wiped down after exposure. Its band covers freezing nights and hot interiors.

The low-temperature battery rating reflects real capacity loss in cold. At about 1 kg, the unit is worn or holstered. Both hands stay free. Warm-up of 12 minutes or less lets a crew power up en route.

1. Power on in clean air; finish warm-up and self-test (≤ 12 min).
2. Confirm a clean baseline before entering the area.
3. Present the inlet to the source; let the pump draw the sample.
4. Read the identification; confirm the alarm.
5. Log the substance, time and location.
6. Withdraw to clean air; purge before the next measurement.
7. End of shift: decontaminate, charge, update the log.

For quotations, demonstrations, library customisation and technical support, contact the manufacturer directly.