Description
testo 350 - Analysis Box for exhaust gas analysis systems
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Increased measurement range for unlimited measurements even when gas concentrations are higher
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Easy-to-change gas sensors and easy access to wearing parts
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Sealed housing with built-in impact protection for use in harsh conditions
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Automatic processing of measuring programmes over a longer period
The testo 350 is a rugged, easy-to-use exhaust gas analyzer designed to meet the highest demands when it comes to carrying out precise industrial emission measurements and providing proper data administration. The Analysis Box can be operated with up to 6 gas sensors, 5 of which are optional. This allows you to select freely from sensors for CO, NO, NO2, SO2, H2S, CxHy and CO2.
Product Description
Ideal for professional exhaust gas analysis and industrial emission measurements. The testo 350 exhaust gas analyzer is a rugged piece of kit designed to meet the demands of a variety of different measuring and analysis applications. It is also excellently suited for complex data compilation.
The testo 350 exhaust gas analyzer is made up of two separate units
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The testo 350 Control Unit (separate product) is used to control emission measurements. It has a clearly structured graphic display and is especially easy to use. There are four different applications in the menu to choose from: burner, gas turbine, motors and user-defined applications. The instructions on the display guide you through the measurement and make the steps leading up to the start of the measurement easier. This saves both time and hassle. The Control Unit can also be used to remote control the Analysis Box when it is not positioned at the exhaust gas pipe or measurement site. This is especially advisable when carrying out work on larger systems.
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The testo 350 Analysis Box contains the sensor system and the electronics that are needed to perform emission measurements. The Analysis Box comes standard equipped with an O2 gas sensor. You will, however, need to connect at least one more sensor (max. six) to operate the Box. Optional sensors include gas sensors for CO, CO2, NO, NO2, SO2, H2S and CxHy.
The increased measuring range allows you to carry out unlimited measurements even when gas concentrations are high. The increased measuring range (thinning) is automatically activated when gas concentrations are unexpectedly high. The measuring range of a selected sensor can be increased by a certain factor. An opening on the underside of the analyzer gives you access to all the relevant service and wearing parts, i.e. pumps and filters, which can easily be cleaned or replaced. The testo 350 also has numerous diagnosis functions with easy-to-understand readings and information. The exhaust gas analyzer constantly displays the current reading.
The Analysis Box can be controlled by the Control Unit. It can, however, also be operated directly via USB, Bluetooth® 2.0 or CANCase from a PC or notebook. After the Analysis Box has been programmed, it can carry out measurements independently and save the results. It can also transfer the data directly to the Control Unit.
Conducting industrial emission measurements with the testo 350
The testo 350 exhaust gas analyzer has been specially designed for carrying out industrial emission measurements in the field. In the tab “Applications” you will find out more about:
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Emission measurements on industrial motors
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Emission measurements on burners
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Emission measurements on gas turbines
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Emission measurements on thermo processes
Delivery Scope
testo 350 Analysis Box, O2, incl. differential pressure sensor, type K NiCr-Ni and type S temperature sensor port, Pt10Rh-Pt, Testo data bus port, rechargeable battery, built-in combustion air sensor (NTC), trigger port, data memory, USB interface, carrying strap set for the testo 350 analyzer box and control unit.
Technical Data
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Temperature - NTC |
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Measuring range |
-20 to +50 °C |
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Accuracy |
±0.2 °C (-10 to +50 °C) |
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Resolution |
0.1 °C (-20 to +50 °C) |
Ambient temperature probe
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Temperature - TC Type K (NiCr-Ni) |
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Measuring range |
-200 to +1370 °C |
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Accuracy |
±0.4 °C (-100 to +200 °C)
±1 °C (-200 to -100.1 °C)
±1 °C (200.1 to +1370 °C) |
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Resolution |
0.1 °C (-200 to +1370 °C) |
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Temperature - TC Type S (Pt10Rh-Pt) |
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Measuring range |
0 to +1760 °C |
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Accuracy |
±1 °C (0 to +1760 °C) |
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Resolution |
0.1 °C (0 to +1760 °C) |
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Differential Pressure - Piezoresistive |
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Measuring range |
-40 to +40 hPa
-200 to +200 hPa |
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Accuracy |
±1.5 % of mv (-40 to -3 hPa)
±1.5 % of mv (+3 to +40 hPa)
±0.03 hPa (-2.99 to +2.99 hPa)
±1.5 % of mv (-200 to -50 hPa)
±1.5 % of mv (+50 to +200 hPa)
±0.5 hPa (-49.9 to +49.9 hPa) |
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Resolution |
0.01 hPa (-40 to +40 hPa)
0.1 hPa (-200 to +200 hPa) |
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Absolute Pressure |
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Measuring range |
600 to +1150 hPa |
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Accuracy |
±10 hPa |
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Resolution |
1 hPa |
opt. when equipped with IR sensor
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Flue gas O₂ |
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Measuring range |
0 to +25 Vol.% |
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Accuracy |
±0.8% of fsv (0 to +25 Vol.%) |
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Resolution |
0.01 Vol.% (0 to +25 Vol.%) |
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Reaction time t₉₀ |
20 s (t95) |
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Flue gas CO (with H₂-compensation) |
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Measuring range |
0 to +10000 ppm |
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Accuracy |
±5 % of mv (+200 to +2000 ppm)
±10 % of mv (+2001 to +10000 ppm)
±10 ppm (0 to +199 ppm) |
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Resolution |
1 ppm (0 to +10000 ppm) |
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Reaction time t₉₀ |
40 s |
H₂ only as an indicator
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Flue gas COlow |
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Measuring range |
0 to 500 ppm |
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Accuracy |
±5 % of mv (+40 to +500 ppm)
±2 ppm (0 to +39.9 ppm) |
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Resolution |
0.1 ppm (0 to +500 ppm) |
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Reaction time t₉₀ |
40 s |
H₂ only as an indicator
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Flue gas NO |
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Measuring range |
0 to +4000 ppm |
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Accuracy |
±5 % of mv (+100 to +1999 ppm)
±10 % of mv (+2000 to +4000 ppm)
±5 ppm (0 to +99 ppm) |
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Resolution |
1 ppm (0 to +4000 ppm) |
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Reaction time t₉₀ |
30 s |
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Flue gas Nolow |
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Measuring range |
0 to +300 ppm |
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Accuracy |
±5 % of mv (+40 to +300 ppm)
±2 ppm (0 to +39.9 ppm) |
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Resolution |
±0.1 ppm (0 to +300 ppm) |
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Reaction time t₉₀ |
30 s |
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Flue gas NO₂ |
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Measuring range |
0 to +500 ppm |
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Accuracy |
±5 % of mv (+100 to +500 ppm)
±5 ppm (0 to +9.99 ppm) |
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Resolution |
0.1 ppm (0 to +500 ppm) |
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Reaction time t₉₀ |
40 s |
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Flue gas SO₂ |
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Measuring range |
0 to +5000 ppm |
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Accuracy |
±5 % of mv (+100 to +2000 ppm)
±10 % of mv (+2001 to +5000 ppm)
±5 ppm (0 to +99 ppm) |
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Resolution |
1 ppm (0 to +5000 ppm) |
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Reaction time t₉₀ |
30 s |
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Flue gas degree of effectivity, Eta (calculated) |
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Measuring range |
0 to +120 % |
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Resolution |
0.1 % (0 to +120 %) |
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Flue gas loss (calculated) |
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Measuring range |
0 to +99.9 % |
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Resolution |
0.1 % (0 to +99.9 %) |
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Flue gas dewpoint (calculated) |
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Measuring range |
0 to +99.9 °Ctd |
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Resolution |
0.1 °Ctd (0 to +99.9 °Ctd) |
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Flue gas CO₂ calculation (calculated from O₂) |
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Measuring range |
0 to CO₂ max |
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Accuracy |
calculated from O₂ ±0.2 Vol.% |
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Resolution |
0.01 Vol.% |
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Flue gas H₂S |
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Measuring range |
0 to +300 ppm |
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Accuracy |
±5 % of mv (+40 to +300 ppm)
±2 ppm (0 to +39.9 ppm) |
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Resolution |
0.1 ppm (0 to +300 ppm) |
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Reaction time t₉₀ |
35 s |
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Flue gas CO₂ - NDIR |
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Measuring range |
0 to +50 Vol.% |
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Accuracy |
±0.3 Vol.% + 1 % of mv (0 to 25 Vol.%)
±0.5 Vol.% + 1.5 % of mv (25 to 50 Vol.%) |
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Resolution |
0.01 Vol.% (0 to 25 Vol.%)
0.1 Vol.% (> 25 Vol.%) |
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Reaction time t₉₀ |
10 s |
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Velocity / Volume flow |
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Measuring range |
0 to +40 m/s |
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Resolution |
0.1 m/s (0 to +40 m/s) |
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Methane (CH₄) |
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Measuring range |
100 to 40000 ppm |
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Accuracy |
< 400 ppm (100 to 4000 ppm)
< 10 % of mv (> 4000 ppm) |
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Resolution |
10 ppm |
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Min. O₂ requirement in flue gas |
2 % + (2 x mV methane) |
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Reaction time t₉₀ |
< 40 s |
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Response factor |
1 |
Lower explosion limit (LEL) must be adhered to.
The HC sensor is adjusted to methane ex-works. It can be adjusted to a different gas (propane or butane) by the user.
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Propane (C₃H₈) |
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Measuring range |
100 to 21000 ppm |
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Accuracy |
< 400 ppm (100 to 4000 ppm)
< 10 % of mv (> 4000 ppm) |
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Resolution |
10 ppm |
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Min. O₂ requirement in flue gas |
2 % + (5 x mV propane) |
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Reaction time t₉₀ |
< 40 s |
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Response factor |
1.5 |
Lower explosion limit (LEL) must be adhered to.
The HC sensor is adjusted to methane ex-works. It can be adjusted to a different gas (propane or butane) by the user.
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Butane (C₄H₁₀) |
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Measuring range |
100 to 18000 ppm |
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Accuracy |
< 400 ppm (100 to 4000 ppm)
< 10 % of mv (> 4000 ppm) |
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Resolution |
10 ppm |
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Min. O₂ requirement in flue gas |
2 % + (6.5 x mV butane) |
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Reaction time t₉₀ |
< 40 s |
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Response factor |
2 |
Lower explosion limit (LEL) must be adhered to.
The HC sensor is adjusted to methane ex-works. It can be adjusted to a different gas (propane or butane) by the user.
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General technical data |
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Dimensions |
330 x 128 x 438 mm |
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Operating temperature |
-5 to +45 °C |
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Housing |
ABS |
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Protection class |
IP40 |
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Warranty |
Measuring instrument 2 years (excepting wearing parts e.g. gas sensors, etc.); CO sensor: 12 months; CO₂-IR sensors:24 months; Sensor NO2: 12 months; Sensor O₂: 18 months; Sensor SO₂: 12 months; Sensor H₂S: 12 months; Sensor CxHy: 12 months; The warranty applies to average sensor load.; rechargeable battery: 12 months; Sensor NOlow: 12 months; NO sensor 12 months; COlow sensor 12 months |
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Battery type |
lithium batteries |
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Battery life |
5 h |
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Power supply |
AC mains unit 100V to 240V (50 to 60 Hz) |
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DC electric tension input |
11V to 40V |
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Trigger input |
Voltage 5 to 12 Volt (rising or trailing edge) pulse width > 1 sec load: 5 V/max, 5 mA, 12 V/max. 40 mA |
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Max. humidity load |
70 °C dewpoint temperature |
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Dewpoint calculation |
0 °Ctd; 99 °Ctd |
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Max. dust load |
20 g/m³ dust in flue gas |
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Max. neg. press./flue gas |
-300 mbar |
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Max. pos. press./flue gas |
50 mbar |
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Hose length |
16.2 m (corresponds to 5 probe hose extensions) |
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Pump flow |
1 l/min. with through-flow monitoring |
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Maximum |
250,000 readings |
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Storage temperature |
-20 to +50 °C |
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Weight |
4800 g |
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