Forensics Mini 4 Gas Monitor — Compact O2, CO, H2S & LEL (NIST)

Forensics Mini 4 Gas Monitor — Compact O2, CO, H2S & LEL

The Forensics mini 4 gas monitor packs O2, CO, H2S and LEL into a compact, NIST-calibrated body — a portable gas detector for crews who want full four-gas coverage in the smallest, easiest-to-carry form, with a top 4.8-star rating.

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The Forensics Mini 4 Gas Monitor is a compact, NIST-calibrated, USB-rechargeable confined-space monitor for O2, CO, H2S and combustible LEL.

Key features

• Reads all four confined-space gases — O2, CO, H2S and LEL — in a compact body
• USA NIST-traceable calibration for documented accuracy
• USB-rechargeable for shift-long use
• Smaller and lighter than standard 4-gas meters for easy carry
• Audible, visual and vibration alarms
• Strong 4.8-star rating

Specifications

Where the Forensics Mini 4 Gas Monitor fits

• Confined-space entry monitoring
• Field and utility work
• Maintenance rounds
• Backup/spare 4-gas in a kit
• General multi-gas spot checks

What the Forensics Mini 4 Gas Monitor detects (and what it doesn’t)

It monitors O2, CO, H2S and combustible LEL — not VOCs, CO2 or specific toxics. For VOCs use the Forensics VOC Detector; for single toxics the Chlorine or Ammonia analyzers. It is diffusion; for remote pre-entry sampling use the Forensics 4 Gas + Pump. Compared with the 4 Gas Meter it is more compact. Bump-test before use.

Cross-shopping? This unit sits in our Portable Gas Detectors hub alongside Forensics VOC Detector, Amprobe CO2-100, Forensics Ammonia Detector, Forensics Chlorine Analyzer. For other gas-detection form factors see Personal & Wearable Gas Detectors, Fixed Gas Detection Systems, Area & Transportable Gas Monitors, or browse the full Gas Detectors range.

Portable 4-gas options compared

• Choose the Mini 4 Gas Monitor for the most compact NIST-calibrated four-gas at a low price.
• Want the lightest standard meter? See the Forensics 4 Gas Meter.
• Need a pump? Use the Forensics 4 Gas + Pump.

Frequently asked questions

What gases does the Forensics mini 4 gas monitor measure?

O2, CO, H2S and combustible LEL — the confined-space set. For VOCs use the Forensics VOC Detector.

How is it different from the standard 4 Gas Meter?

It is more compact and USB-rechargeable; the Forensics 4 Gas Meter is the lightest standard meter. Both are NIST-calibrated.

Is it NIST calibrated?

Yes — USA NIST-traceable calibration. Bump-test before use and recalibrate on schedule.

Is it rechargeable?

Yes — USB-rechargeable, sized for a full work shift.

Can I use it for confined-space entry?

Yes for monitoring the four hazards. For pre-entry sampling, use the Forensics 4 Gas + Pump.

Does it have a pump?

No — it is diffusion. For remote sampling choose the pump model.

What alarms does it have?

Audible, visual and vibration alarms trigger when any of the four gases exceeds its set point.

What does it not detect?

VOCs, CO2 and specific toxics. For VOCs use the VOC Detector; for chlorine the Chlorine Analyzer.

Why is it rated so highly?

It pairs compact size, NIST calibration and USB charging at a low price, earning a strong 4.8-star rating.

Is it in stock and how does it ship?

Use the Amazon buy button for current availability and delivery timing through our fulfillment partner.

How long do the sensors last?

Electrochemical and catalytic sensors typically last two to three years; budget for replacement sensors and calibration gas.

Is it a good backup unit?

Yes — its compact size and low price make it a popular spare/backup 4-gas to keep in a kit or truck.