Ion Mobility Spectrometry Chemical Detection Instruments with Rapid Response and Rechargeable Battery for Hazardous Substance Identifier

This guide is for responders, inspectors and technicians who carry the MR-AIMS on duty. It assumes no prior knowledge of ion mobility spectrometry.

Its aim is simple: get a trustworthy result fast, recognise when a result needs caution, and keep the instrument serviceable between services.

• Sample inlet — where air enters; keep it clear and clean.
• Display — shows identification, class, alarm state and status.
• Audible alarm and visual indicator — work while watching the scene.
• Controls — power and function keys for start-up and menus.
• Battery compartment — removable pack rated for a full shift.
• Status annunciators — warm-up, faults and low battery.

• Battery charged and seated; carry a spare for long incidents.
• Inlet and filter free of dust, liquid or contamination.
• Correct substance library loaded for the task.
• Date and time set, so logs are accurate.
• Alarm volume audible over scene noise.
• Harness or holster secure.

Switch on in clean air. Avoid exhausts, solvents and smoking areas. Warm-up takes twelve minutes or less. The drift tube, electronics and sampling path stabilise during this time.

Starting in contaminated air biases the baseline. A clean start-up point is worth the walk. Once warm-up ends, confirm a stable baseline before moving in.

If the unit reports a fault at start-up, do not deploy it. Record the condition and withdraw it for service.

• Approach from upwind; let the plume reach the inlet.
• Hold steady for several seconds; fast sweeping prevents equilibrium.
• Survey the perimeter first, then move closer.
• Keep liquid, droplets and heavy dust out of the inlet.
• Sample strong sources from further away; a saturated inlet is slow to purge.
• Watch for cross-sensitivity from humidity, solvents, fuels and exhaust.
• If a result surprises you, clear in clean air and re-sample.

The unit reports the best library match and the substance class. Treat it as decision support, not absolute truth. Ask whether the result fits the location.

A high-toxicity compound in a paint store deserves scepticism. Hydrogen sulphide at a wastewater inlet does not. Mixed atmospheres are the hardest case.

One substance can dominate and suppress another. Sample from several positions. Record every identification, not only the first alarm.

1. Treat the alarm as real; keep respiratory protection on.
2. Note the substance, time and your position.
3. Withdraw upwind and uphill to the assembly point.
4. Report the identification and location to the controller.
5. Re-sample from a safe distance to map the plume.
6. Decontaminate or bag the unit per procedure before leaving the hot zone.

Before switching off, run the unit in clean air until the reading clears. This purges the sampling path and reduces carry-over into the next job.

Wipe the exterior. Decontaminate if exposure is suspected. Charge the battery. Complete the log. Report anomalies while details are fresh.

A full charge gives at least ten hours at normal temperature. Cold reduces capacity. Plan for at least six hours in low temperatures.

Keep a spare pack warm inside clothing during winter work. Top up whenever you can. Do not wait for the low-battery warning.

Store between −40 °C and +55 °C. Keep the unit clean, dry and protected from impact, ideally in its case.

For long storage, remove or periodically recharge the battery. Cap or cover the inlet. The IP67 rating tolerates wet and dusty service, but dry the unit before storage.

• The MR-AIMS identifies hazards. It does not protect you. PPE remains mandatory.
• Never use it alone for confined-space entry. Add a multi-gas monitor, ventilation checks and a permit.
• Results show presence and identity, not concentration. Treat any confirmed highly toxic find as maximum risk.
• Never open the unit in the field; the sampling path may hold contamination.

• Spare battery pack and charger.
• Inlet filters and sampling consumables.
• Carrying case and harness.
• Verification material for functional checks.
• Updated manuals and library release notes.

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