Smart Sensor NO2 Gas Detector — Handheld Nitrogen Dioxide Monitor (0-20 ppm)

Smart Sensor NO2 Gas Detector — Handheld Nitrogen Dioxide Monitor

The Smart Sensor NO2 gas detector measures nitrogen dioxide from 0-20 ppm on a rechargeable handheld — a portable gas detector for diesel exhaust, welding fume and firing ranges, covering a toxic gas the four-gas set doesn’t.

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The Smart Sensor NO2 Gas Detector is a handheld, rechargeable nitrogen dioxide monitor (0-20 ppm) with an LCD and audible, visual and vibration alarms for diesel-exhaust and welding environments.

Key features

• Measures nitrogen dioxide (NO2) from 0-20 ppm — a toxic gas outside the 4-gas set
• Rechargeable Li-battery with LCD readout
• Audible, visual and vibration alarms
• Compact 200 g handheld
• For diesel-exhaust, welding-fume and firing-range NO2
• Covers a hazard a standard four-gas monitor doesn't detect

Specifications

Where the Smart Sensor NO2 Detector fits

• Diesel-exhaust areas (garages, depots)
• Welding and metal fabrication
• Indoor firing ranges
• Combustion and boiler areas
• Confined-space NO2 risk

What the Smart Sensor NO2 Detector detects (and what it doesn’t)

It detects nitrogen dioxide (NO2) only — not O2, combustibles, CO or H2S. For the four atmospheric gases use a Forensics 4 Gas Meter; for other single toxics see the Chlorine or SO2 analyzers. NO2 is heavier than air and comes mainly from combustion (diesel exhaust, welding). Verify response against NO2 calibration gas periodically.

Cross-shopping? This unit sits in our Portable Gas Detectors hub alongside Forensics HCN Detector, Forensics Hydrogen Analyzer, Forensics Chlorine Analyzer, Forensics SO2 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.

Where the Smart Sensor NO2 detector fits

NO2 detection covers diesel-exhaust and welding hazards a four-gas monitor misses. For other single toxics, the Forensics Chlorine and SO2 analyzers cover Cl2 and SO2; for the four atmospheric gases use a 4 Gas Meter.

• Choose the Smart Sensor NO2 Detector for diesel-exhaust, welding and firing-range nitrogen dioxide.
• For chlorine or SO2, see the Chlorine and SO2 analyzers.
• For the four atmospheric gases, use a 4 Gas Meter.

Frequently asked questions

What does the Smart Sensor NO2 detector measure?

Nitrogen dioxide (NO2) from 0-20 ppm. It does not measure O2, LEL, CO or H2S — use a 4 gas meter for those.

Where is NO2 detection needed?

Diesel-exhaust areas (garages, depots, mining), welding and metal fabrication, indoor firing ranges, and combustion/boiler areas.

What is the OSHA limit for nitrogen dioxide?

OSHA sets a ceiling around 5 ppm and ACGIH lists a low TWA; NO2 is toxic at low levels, so a low range and low alarms matter. Confirm current values for your program.

Is NO2 heavier than air?

Yes — nitrogen dioxide is heavier than air and comes mainly from combustion sources like diesel engines and welding.

Is it rechargeable?

Yes — it uses a rechargeable Li-battery with an LCD readout.

What alarms does it have?

Audible, visual and vibration alarms trigger when NO2 exceeds the set point.

Does it come NIST calibrated?

It is factory-set; for a NIST-certified specialty analyzer, the Forensics models (e.g. Chlorine) include certificates. Verify NO2 response against calibration gas periodically.

Can it detect other gases?

No — NO2 only. For chlorine use the Chlorine Analyzer; for SO2 the SO2 Analyzer.

Is it good for diesel exhaust monitoring?

Yes — NO2 is a key marker of diesel exhaust, so this detector suits garages, depots and enclosed diesel-equipment areas.

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 do I keep it accurate?

Verify response against NO2 calibration gas periodically and replace the sensor per the manufacturer's guidance.

Can I use it for confined-space entry?

NO2 is one hazard; entry also needs O2, combustible and toxic testing with a portable 4-gas instrument.