Testo 350 - Engine Kit for Combustion System Compliance Testing and Troubleshooting
Source Monitoring
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, stack emissions testing, and 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 (0–500 ppm), SO₂ (0–5,000 ppm), and hydrocarbons (CₓHᵧ) — and calculates CO₂ from the measured O₂. It supports testing to EPA methods including CTM-030, CTM-034 and Method 7E, and its on-board memory stores up to 250,000 readings. Designed for environmental consultants and emissions testing firms, it runs on field-replaceable rechargeable batteries or AC power for full field portability.
Choose Your Option
Rent for flexible short-term use or purchase to own
Rental Rates
Daily
$300.00
Weekly
$800.00
Monthly
Contact for pricing
Reference rates only. You get the best rate calculation - actual price based on your selected rental dates.
What is the Testo 350 Engine Kit used for?
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.
Testo 350 vs. Testo 340 — which should I rent?
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.
What measurement ranges does the Testo 350 cover?
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.
How does the Testo 350 support EPA-compliant emissions testing?
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.
How do I get stable, defensible readings during a compliance test?
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.
Does the Testo 350 support datalogging?
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.
What's included in the rental kit?
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.
What does it cost to rent the Testo 350 Engine Kit?
$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 October 08, 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 October 08, 2026
PEL TWA
50 ppm (55 mg/m³)
REL TWA
35 ppm (40 mg/m³)
TLV TWA
25 ppm (29 mg/m³)
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 October 08, 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 October 08, 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: | Source Monitoring |
Equipment Specifications
| Detection Method / Sensor Type: | O2: Electrochemical. CO: Electrochemical (H2 compensated). NO: Electrochemical. NO2: Electrochemical. SO2: Electrochemical. CxHy: Catalytic bead (pellistor) |
| Calculated Parameters: | Combustion efficiency (0–120%); Exhaust gas loss (0–99.9% qA); CO₂ (calculated from O₂, ±0.2% vol, 40s response); Flue gas dewpoint (32–212°F) |
| Gas Channels: | O₂: 0–25% vol; ±0.2% vol; resolution 0.01% vol; response 20s (t95), CO (H₂ compensated): 0–10,000 ppm; ±5 ppm (0–199 ppm), ±5% (200–2,000 ppm), ±10% (2,001–10,000 ppm); resolution 1 ppm; response 40s (t90), CO Low Range (optional sensor, H₂ compensated): 0–500 ppm; ±2 ppm (0–39.9 ppm), ±5% (40–500 ppm); resolution 0.1 ppm; response 40s (t90), NO: 0–4,000 ppm; ±5 ppm (0–99 ppm), ±5% (100–1,999.9 ppm), ±10% (2,000–4,000 ppm); resolution 1 ppm; response 30s (t90), NO Low Range (optional sensor): 0–300 ppm; ±2 ppm (0–39.9 ppm), ±5% (40–300 ppm); resolution 0.1 ppm; response 30s (t90), NO₂: 0–500 ppm; ±5 ppm (0–99.9 ppm), ±5% (100–500 ppm); resolution 0.1 ppm; response 40s (t90), SO₂: 0–5,000 ppm; ±5 ppm (0–99 ppm), ±5% (100–2,000 ppm), ±10% (2,001–5,000 ppm); resolution 1 ppm; response 30s (t90), CₓHᵧ (HC, factory-adjusted to methane): 100–40,000 ppm methane / 100–21,000 ppm propane / 100–18,000 ppm butane; resolution 10 ppm; response <40s |
| Sample Flow Rate: | Built-in flow-controlled pump, 1 L/min with flow rate monitoring; hose length up to 53 ft |
| Additional Measurements: | Differential pressure: ±16 in H₂O and ±80 in H₂O ranges (±1.5% of reading); Flow velocity: 0–131 ft/sec; Absolute pressure (optional IR sensor): -240 to 461 in H₂O; Temperature: Type K -200 to 1,370°C, Type S 0–1,760°C |
| Bluetooth: | ✓ Yes |
| Protection Class: | IP40 (analyzer); probe rated for harsh flue gas environments |
| Data Logging Interval: | easyEmission PC software supports 1 sec–1 hr logging intervals; onboard memory logs continuously to capacity. For measurements longer than 2 hours Testo recommends the optional Peltier gas preparation |
| Data Storage Capacity: | 250,000 measurement values (onboard memory) |
| Battery Run Time: | Analyzer box: approx. 2.5 hours at maximum load (configuration dependent); Control unit: approx. 5 hours (without wireless); field-replaceable batteries, no tools required; AC power supply (90–260V, 47–65Hz) and 11–40 V DC input available |
| Compliance Standards: | EPA Method 7E, EPA Method 10, EPA Method 3A, EPA Method 19, EPA OTM 38, EPA OTM 39, EPA CTM-030, EPA CTM-034, ASTM D6522, SCAQMD 1110.2, SCAQMD 1146 |
Kit Contents
Manufacturer Resources
Documents
User manuals, safety guides, and technical documentation from the manufacturer:
- Testo 350 Specs PDF
- Testo 350 Manual PDF
- Testo 350 Quick Start Guide PDF
- Testo 350 What's in the Box PDF
- Practical Guide: Industrial Flue Gas Analysis PDF
Videos
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