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Testo 300+ Flue Gas Analyser – Choice of Kit
Testo 300+ Flue Gas Analyser
The Testo 300+ Flue Gas Analyser is a comprehensive combustion analyser capable of measuring all the parameters required for domestic boiler checks and services. It is compatible with Testo’s 510i, 115i, and 915i Smart Probes, enabling additional tests, and wirelessly connects with Testo’s Smart App for documenting data, as well as creating and sending reports on-site. Available with an optional NO sensor, the Testo 300+ is perfect for domestic and commercial gas/HVAC engineers.
Flue Gas Measurements
Fitted with electrochemical sensors, as standard the Testo 300+ can measure:
- O2
- CO with H2 compensation
- COlow with H2 compensation
- Efficiency
- Flue gas loss
- CO2 (calculated from O2)
- Draught
- Pressure
- Temperature
When used with a flue gas probe or CO probe, the 300+ can also determine internal and external ambient CO. Additionally, the Testo 300+ may be fitted with an NO sensor, either at the point of purchase or retrospectively, thereby facilitating NO and NOlow measurement.
All readings are indicated on the flue gas analyser’s large touchscreen display. Every data value is visible without the need for scrolling. Furthermore, the Testop 300+ guides gas engineers through pre-saved menus for the most important tests. This intuitive menu combined with the FGA’s fast-response smart-touch display ensures it is easy to operate and ready to use at the touch of a button.
Testo Smart Probes
Wireless Bluetooth connectivity means the Testo 300+ can be used with Testo Smart Probes to measure up to four additional parameters in parallel with flue gas analysis. Results are automatically indicated on the Testo 300+’s display.
Testo 510i Differential Pressure Meter
Use the Testo 300+ with the 510i Smart Probe to determine differential pressure, gas flow, or static pressure.
Testo 115i Clamp Thermometer
When two Testo 115i Smart Probes are used in conjunction with the Testo 300+ Flue Gas Analyser, gas engineers can measure flow and return temperature.
Testo 915i Thermometer Smart Probe
Gas engineers can conveniently and quickly ascertain combustion air temperature with the Testo 915i Smart Probe and Testo 300+ FGA.
Testo Smart App
In addition to Testo Smart Probes, the 300+ is compatible with the Testo Smart App. Gas Engineers with the Testo Smart App installed on their smartphone or tablet can use their smart device as a second display, allowing them to leave the Testo 300+ in situ while they view data from a convenient distance. Additionally, reports may be created and sent via email using the Testo Smart App.
Robust, Ergonomic Design
The Testo 300+ is TϋV-tested to EN50379, part 1 and 3. It is housed in a robust plastic casing and has a scratch-resistant screen, ensuring it can withstand the vigors of daily use. A magnetic holder enables hands-free operation while efficient probe changes maximise productivity.
Testo 300+ Kits
The Testo 300+ is available individually or as part of four kits. The table below outlines the contents of each option.
| Kit | Handset Only | Standard | Advanced | Smart | Ultra-Smart |
| Testo 300+ Flue Gas Analyser | ✔ | ✔ | ✔ | ✔ | ✔ |
| USB Bluetooth Adapter | ✔ | ✔ | ✔ | ✔ | ✔ |
| Calibration Protocol | ✔ | ✔ | ✔ | ✔ | ✔ |
| Compact Flue Gas Probe (180mm Ø6mm) | - | ✔ | ✔ | ✔ | ✔ |
| Soft Case | - | ✔ | ✔ | ✔ | ✔ |
| 2x NTC Clamp Probes | - | - | ✔ | - | - |
| Pressure connection Kit with 2x Silicone Hoses | - | - | ✔ | - | - |
| 2x Testo 115i Clamp Thermometer | - | - | - | ✔ | ✔ |
| 1x Testo 510i Differential Pressure Meter | - | - | - | ✔ | ✔ |
| 1x Gas Leak Detector | - | - | - | - | ✔ |
The Testo 300+ Flue Gas Analyser is an ergonomic, easy-to-use, efficient combustion analyser with an eclectic variety of measurement capabilities.
Key Features
- A comprehensive combustion analyser suitable for domestic boiler checks and services
- Can be fitted with an NO sensor for checking commercial boilers
- O2
- CO with H2 compensation
- COlow with H2 compensation
- Efficiency
- Flue gas loss
- CO2 (calculated from O2)
- Draught
- Pressure
- Temperature
- Internal ambient CO using a flue gas probe
- External ambient CO using a CO probe
- NO and NOlow (when fitted with an NO sensor)
- NO sensor can be fitted retrospectively
- Large touchscreen display
- View all readings without scrolling
- Guides users through pre-saved menus for the most important tests
- Wireless Bluetooth connectivity
- Connect to Testo Smart Probes to measure up to four additional parameters in parallel with flue analysis
- Compatible with the Testo 510i, 115i, and 915i Smart Probes
- Compatible with the Testo Smart App
- Use a tablet or smartphone with the Testo Smart App installed as a second display
- Create and send reports on-site via the Testo Smart App
- TϋV-tested to EN50379, part 1 and 3
- Robust plastic casing
- Scratch-resistant screen
- Magnetic holder
- Efficient probe changes
- An ergonomic, easy-to-use, efficient combustion analyser
What’s Included?
- Your Choice of Testo 300+ Flue Gas Analyser Kit
| Kit | Handset Only | Standard | Advanced | Smart | Ultra-Smart |
| Testo 300+ Flue Gas Analyser | ✔ | ✔ | ✔ | ✔ | ✔ |
| USB Bluetooth Adapter | ✔ | ✔ | ✔ | ✔ | ✔ |
| Calibration Protocol | ✔ | ✔ | ✔ | ✔ | ✔ |
| Compact Flue Gas Probe (180mm Ø6mm) | - | ✔ | ✔ | ✔ | ✔ |
| Soft Case | - | ✔ | ✔ | ✔ | ✔ |
| 2x NTC Clamp Probes | - | - | ✔ | ✔ | ✔ |
| Pressure connection Kit with 2x Silicone Hoses | - | - | ✔ | ✔ | ✔ |
| 2x Testo 115i Clamp Thermometer | - | - | - | ✔ | ✔ |
| 1x Testo 510i Differential Pressure Meter | - | - | - | ✔ | ✔ |
| 1x Gas Leak Detector | - | - | - | - | ✔ |
Testo 300+ Flue Gas Analyser Technical Specifications
| Measurement parameter | Measuring range |
Accuracy (±1 digit) | Solution |
| O2 measurement | 0 to 21 vol.% | ±0.2 vol.% | 0.1 vol.% |
| CO measurement (with H2 compensation) |
0 to 8,000 ppm | ±10 ppm or ± 10% of m.v. (0 to 200 ppm) ±20 ppm or ± 5% of m.v. (201 to 2,000 ppm) ±10% of m.v. (2,001 to 8,000 ppm) |
1 ppm |
| CO measurement (with H2 compensation and dilution) |
0 to 30,000 ppm | ±100 ppm or ± 10% of m.v. | 1 ppm |
| COlow measurement (with H2 compensation) |
0 to 500 ppm | ±2 ppm (0 to 40 ppm) ±5% of m.v. (remaining measuring range) |
0.1 ppm |
| NO measurement | 0 to 3,000 ppm | ±5 ppm (0 to 100 ppm) ±5% of m.v. (101 to 2,000 ppm) ±10% of m.v. (2,001 to 3,000 ppm) |
1 ppm |
| NOlow measurement | 0 to 300 ppm | ±2 ppm (0 to 39.9 ppm) ±5% of m.v. (40 to 300 ppm) |
0.1 ppm |
| Efficiency testing (Eta) | 0 to 120% | 0.1% | |
| Flue gas loss | 0 to 99.9% | 0.1% | |
| CO2 determination (digital calculation from O2) |
Display range 0 to CO2 max. |
±0.2 vol.% | 0.1 vol.% |
| Draught measurement | -9.99 to +40 hPa | ±0.005 hPa (0 to 0.1 hPa) ±0.02 hPa (0.1 to +3.00 hPa) ±1.5% of m.v. (+3.01 to +40 hPa) |
0.001 hPa (0 to 0.1 hPa) 0.01 hPa (remaining meas. range) |
| 4 Pa measurement (for instruments with dilution) |
-50 to +50 Pa | ±0.3 Pa (< 10 Pa) ±3% of m.v. (remaining measuring range) |
0.1 Pa |
| Pressure measurement | -100 to +200 hPa | ±0.5 hPa (0 to +50.0 hPa) ±1 % of m.v. (+50.1 to +100.0 hPa) ±1.5% of m.v. (+100.1 to +200 hPa) |
0.01 hPa |
| Temperature (instrument) | -40 to +1200 °C | ±0.5 °C (0.0 to +100.0 °C) ±0.5% of m.v. (remaining measuring range) |
0.1°C (-40 to +999.9°C) 1 °C (remaining measuring range) |
| Ambient CO measurement (internal/flue gas probe) |
0 to 2,000 ppm | ±10 ppm (0 to 100 ppm) ±10% of m.v. (101 to 2,000 ppm) |
1 ppm |
| Ambient CO measurement (external with CO probe) |
0 to 500 ppm | ±3 ppm (0 to 29 ppm) ±10% of m.v. (30 to 500 ppm) |
1 ppm |
| General Technical Data | |||
| Certification | The testo 300 is TÜV-tested according to 1st German Federal Immission Control Ordinance (BImSchV) EN 50379, Parts 1-3 | ||
| Storage temperature | -20 to +50 °C | ||
| Operating temperature | -5 to +45 °C | ||
| Charging temperature | 0 to +45 °C | ||
| Humidity application range | 15 to 90 %RH, non-condensing | ||
| Power supply | Rechargeable battery, USB mains unit | ||
| Rechargeable battery life | 10 h | ||
| Protection class | IP 40 | ||
| System requirements | Requires iOS 11.0 or newer, Android 6.0 or newer, mobile device with Bluetooth 4.0 | ||
| Wireless range | Up to 100m with no obstructions | ||
| Testo BT Connector | Interface for connecting testo Smart Probes to the measuring instrument | ||
| Memory | 1 million measuring values | ||
| Display | 5.0" touch display, HD 1280*720 pixels, IPS (160 k) | ||
| Weight | Approx. 800 g | ||
| Dimensions | L: 244 mm (including probe connection) H: 59 mm W: 98 mm | ||
| testo 300+ warranty | Instrument/probe/gas sensors O2, CO sensor 60 months Thermocouple and rechargeable battery 12 months |
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Additional Information
| SKU | Testo-300+ |
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