Testo 350 - Engine Kit for Combustion System Compliance Testing and Troubleshooting

Area Monitoring Datalogging
Emissions Manufacturer: Testo
Testo 350 - Engine Kit for Combustion System Compliance Testing and Troubleshooting
Testo 350 - Engine Kit for Combustion System Compliance Testing and Troubleshooting
Testo 350 - Engine Kit for Combustion System Compliance Testing and Troubleshooting

The Testo 350 Engine Kit by Testo is an advanced portable flue gas analyzer configured for stationary engine testing, EPA-compliant stack emissions testing, and comprehensive combustion diagnostics on natural gas engines, diesel engines, gas turbines, and industrial combustion systems. It measures up to six gases simultaneously — O₂ (0–25% vol.), CO (0–10,000 ppm), NO (0–4,000 ppm), NO₂ (0–5,000 ppm), SO₂ (0–5,000 ppm), and hydrocarbons (CₓHᵧ) — with EPA-certified accuracy for regulatory compliance documentation. Designed for environmental consultants and emissions testing firms, it features an integrated printer, on-board data storage, and a rechargeable battery for full field portability.

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$300.00
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$800.00
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Testo 350 - Engine Kit for Combustion System Compliance Testing and Troubleshooting
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Technician verified and tested instrumentation before every rental
Expert support available by phone and email
Fast delivery and flexible rental terms

Frequently Asked Questions

It's a portable multi-gas combustion and emissions analyzer for compliance testing and diagnostics on engines, boilers, turbines, and industrial combustion systems. It measures up to six gases simultaneously — O₂, CO, NO, NO₂, SO₂, and hydrocarbons — and is rated for EPA-compliant emissions testing and industrial stack testing.

Rent the Testo 340 for routine boiler/furnace tuning and basic emissions checks with up to four gases. Rent the Testo 350 when you need more gases simultaneously (including SO₂ and hydrocarbons), compliance-grade documentation, or a formal emissions test plan. If the job involves regulatory reporting, default to the 350.

O₂ 0–25% vol, CO 0–10,000 ppm (low range: 0–500 ppm), NO 0–4,000 ppm (low range: 0–300 ppm), NO₂ 0–5,000 ppm, SO₂ 0–5,000 ppm, and CxHy hydrocarbons 0–40,000 ppm as CH₄. Confirm sensor configuration at dispatch if your test plan requires specific gases or low-range resolution.

It's rated for EPA-certified accuracy for regulatory compliance testing. Compliance is still method-driven — you need the correct test procedure, calibration verification steps, QA documentation, and appropriate probe setup. Confirm required gases, units, and documentation format with your program before mobilizing.

Position the sampling probe in a representative, stable flue gas stream. Let readings fully stabilize before recording — hydrocarbon response can take up to 60 seconds. Keep probe placement consistent across test points, avoid condensation in the sampling path, and document operating conditions alongside every reading. Unstable readings are almost always a probe placement or sampling path issue.

Yes — it logs time-stamped readings throughout a test. Confirm your deliverable format (exported logs, printed tickets, or manual transcription) before the test so you're not re-running measurements to satisfy documentation requirements.

The kit includes the Testo 350 analyzer with up to six gas sensors (including hydrocarbon), flue gas sampling probe with thermocouple, integrated printer with paper, rechargeable battery, AC charger, protective carrying case, and instruction manual. Confirm sensor configuration for your specific gases before dispatch.

$300/day and $800/week. Pricing beyond two weeks is by quote. For compliance testing campaigns, the number of test points and stabilization time per asset typically drives total cost more than the day rate. Contact us for a project quote.

Exposure Hazards This Equipment Detects

Nitrogen Dioxide (NO₂)

CAS: 10102-44-0
Learn More
Updated on March 17, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
0.2 ppm (0.38 mg/m³)

Carbon Monoxide (CO)

CAS: 630-08-0
Learn More
Updated on March 17, 2026
PEL TWA
50 ppm (55 mg/m³)
REL TWA
35 ppm (40 mg/m³)
TLV TWA
N/A

Oxygen (O₂)

CAS: 7782-44-7
Learn More
Updated on March 09, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A

Sulfur Dioxide (SO₂)

CAS: 7446-09-5
Learn More
Updated on March 09, 2026
PEL TWA
5 ppm (13 mg/m³)
REL TWA
2 ppm (5 mg/m³)
TLV TWA
N/A

Nitric Oxide (NO)

CAS: 10102-43-9
Learn More
Updated on March 09, 2026
PEL TWA
25 ppm (30 mg/m³)
REL TWA
25 ppm (30 mg/m³)
TLV TWA
25 ppm [1992]

Hydrocarbons (CₓHᵧ)

CAS: N/A
Learn More
Updated on March 09, 2026
PEL TWA
N/A
REL TWA
N/A
TLV TWA
N/A

Features & Capabilities

Calibration Certificate Available: ✓ Yes
Datalogging: ✓ Yes
Monitoring Scope: Area Monitoring

Equipment Specifications

Gas SensorRangeResolutionAccuracyResponse TimeO₂0–25% vol0.01%±0.2%<20 secondsCO0–10,000 ppm1 ppm±10 ppm or ±10%<40 secondsCO (Low Range)*0–500 ppm0.1 ppm±5 ppm or ±5%<40 secondsNO0–4,000 ppm1 ppm±5 ppm or ±5%<30 secondsNO (Low Range)*0–300 ppm0.1 ppm±2 ppm or ±5%<30 secondsNO₂0–5,000 ppm0.1 ppm±5 ppm or ±5%<40 secondsSO₂0–5,000 ppm1 ppm±5 ppm or ±10%<40 secondsCₓHᵧ (HC)0–40,000 ppm (as CH₄)10 ppm±100 ppm or ±5%<60 seconds

Additional measurements:

  • Flue gas temperature:-40 to +1,200°C
  • Ambient temperature:-20 to +50°C
  • Draft pressure:-200 to +200 hPa
  • Differential pressure:-200 to +300 hPa
  • Flow velocity:Calculated from differential pressure

Calculated parameters:

  • Combustion efficiency (η)
  • Excess air (λ)
  • CO₂ concentration (calculated)
  • Flue gas loss (qA)
  • Dew point temperature
  • NOₓ (total nitrogen oxides = NO + NO₂)

Memory and data logging:

  • Storage capacity:100 test locations with 10 measurement tests per location (1,000 total measurements)
  • Data logging intervals:Configurable from 1 second to 60 seconds per measurement
  • Storage modes:Manual trigger or continuous automatic logging
  • Data fields stored:All measured gases, temperatures, calculated values, date/time stamp, location ID, operator notes

Power and battery performance:

  • Battery type:High-capacity rechargeable lithium-ion battery pack
  • Runtime at +20°C:8 hours continuous operation with all sensors active
  • Runtime variables:Battery life reduced at cold temperatures, with heavy printer usage, or with Bluetooth active
  • Charging time:4 hours for full charge from empty
  • Hot-swap capability:Replace battery without losing stored data
  • Low battery warning:On-screen indicator with 30-minute advance warning
  • AC operation:100-240V, 50/60 Hz universal adapter allows unlimited runtime when connected to mains power

Environmental:

  • Operating temperature: -5 to +45°C (analyzer), -40 to +1,200°C (probe)
  • Storage temperature: -20 to +50°C
  • Humidity: 5 to 95% RH, non-condensing
  • Protection class: IP40 (analyzer), probe designed for harsh flue gas environments

Kit Contents

Testo 350 analyzer with up to 6 gas sensors (including hydrocarbon sensor), flue gas sampling probe with thermocouple, integrated printer with paper, rechargeable battery, AC charger, protective carrying case, instruction manual (flash drive).

Manufacturer Resources

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