S605 Portable Breathing Air Quality Analyzer

Portable Breathing Air Analyzer for point of use quality monitoring checks to ensure the highest safety standards.

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All-in-one portable breathing air monitoring solution

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Accurate Data of O₂, CO, CO₂, H₂O, Oil Vapor and Pressure

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High-resolution 5" color touch screen

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Ultra-portable and compact design makes it unique

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Powerful PDF breathing air report generator

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USB or optional 4G/LTE interface for data transfer

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Modbus/TCP and Modbus/RTU interface

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Only one gas inlet for all parameters

The S605 Portable Breathing Air Analyzer offers a cutting-edge solution designed to ensure the highest standards of safety and quality in breathing air filling stations and breathing air systems. This state-of-the-art analyzer combines advanced technology with exceptional portability, making it the ideal choice for a wide range of industries and applications. The software-guided measurement makes it easy to use and minimizes the risk of error.

Monitoring of the Relevant Parameters

Equipped with advanced sensors, the S605 measures all essential parameters such as oxygen (O₂) levels, carbon dioxide (CO₂) levels, carbon monoxide (CO) concentration, dew point and oil vapor. The high precision of the sensors ensures accurate readings, empowering operators to maintain optimal air quality and prevent potential health risks.

Following All International Standards

The S605 Breathing Air Analyzer follows all relevant standards, such as EN 12021. The product pre-sets the threshold for different international standards. The user only needs to select and confirm the underlying standard.

Ultraportable and flexible

One of the key features of the S605 is its compact and lightweight design, allowing for easy transport and operation in various settings. Whether you’re in the field, on a job site, or conducting inspections, this portable analyzer provides instant access to crucial information about the air you breathe.

Remote Connection

By integrating a USB port for 4G dongle connection, the S605 can be easily connected to the S4A Software and monitored remotely. This eliminates the need for a Wi-Fi connection. The USB 4G dongle is an optional feature and can be ordered together with the S605 or upgraded later. To use the new feature, a SIM card is required. Get additional information from our instruction video.

Data Logger with Reporting Function

The integrated data logger allows users to log all measurement data for later export and analysis. This data can be used to create powerful PDF reports directly at the point of use. Besides showing the measurement results, sampling point information, customer and service provider information, the report also evaluates the measurement results according to the selected standard and provides an assessment of the breathing air quality.
This integrated PDF generator makes it ideal for audits and spot checks in breathing air applications.

With its unique compactness, plug and play capability and software-guided measurements, the S605 is the most advanced mobile instrument on the market for getting your breathing air processes under control. Please contact us here for more information.

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Operators of breathing air systems are required to fill respiratory air in line with international standards such as EN 12021 or CFSR 1910.134(d). Regular checks with the Breathing Air Quality Analyzer S605 are an indispensable part for a safe operation in Fire Departments, Diving, Offshore, Paint Spraying, Welding, Hazardous chemical

S600 Breathing Air Testing

Following All International Standards

The S605 Breathing Air Analyzer follows all relevant standards, such as EN 12021. The product pre-sets the threshold for different international standards. The user only needs to select and confirm the underlying standard.

StandardEN 12021 (Europe)GB/T 31975-2015 (China)CFR (USA)CSA (Canada)
O220-22 %19.5 - 23.5 %19.5 - 23.5%20 – 22 %
CO2500 ppm≤ 1000 mL/m³1,000 ppm500 ml/m3
CO5 ppm≤ 10 mL/m³10 ppm5 ml/m3
H2OPDP: < -11 °C
1) H2O: <35 mg/m3
2) H2O: <25 mg/m3
ADP: ≤ -45.6 °C-----
VOC (Oil Vapor)0.5 mg/m3≤ 5.0 mg/m³
(Oil mist and particle)
5 mg/m31 mg/m3


Oxygen O2
Accuracy± 1 % of reading ± 0.05 %
Measuring range0 ... 25 %
Resolution0.1 %
SensorOptical oxygen senor
Carbon Dioxide CO2
Accuracy± 1 % of reading ± 25 ppm
Measuring range0 ... 1000 ppm
Resolution1 ppm
SensorNDIR sensor
Carbon Monoxide CO
Accuracy± 5 % of reading ± 1 ppm
Measuring range0 ... 20 ppm
Resolution0.1 ppm
SensorElectrochemical sensor
Humidity H2O
Accuracy± 2 °C Td
Measuring range- 100 ... + 20 °C Td /
0 ... 17458.6 mg/m³
Resolution0,1 mg/m3
SensorQCM + Polymer
Oil Vapor
Accuracy5 % of reading ± 0.003 mg/m³
Measuring range0.001 ... 5.000 mg/m³
(Based on 1000 hPa(a), 20 °C,
0 % relative humidity)
Resolution0,001 mg/m³
SensorPhoto ionization detector
Oil Mist and Particlel
Accuracy15 % of reading ± 0.1 mg/m³
Measuring range0.0 ... 5.0 mg/m³
(Based on 1000 hPa(a), 20 °C,
0 % relative humidity)
Resolution0,1 mg/m³
SensorOil mist and particle sensor
Accuracy0.5 % FS
Measuring range0 ... 16 bar(g)
Resolution0.01 bar
SensorPiezo resistive pressure sensor


ProtocolModbus/RTU (RS485)
Modbus/TCP (Ethernet)
Update rate1 / sec.
Power supply
Voltage supply18-32 VDC, 20 W
Current consumption1.4 A
USBUSB Micro with OTG support
4G/LTE USBUSB Port for 4G/LTE Modem


OthersDevice comes pre-configured
Configuration can be done via
on-screen touch
Integrated5” color touch screen
Data Logger
StorageUp to 3 million recorded data sets
(10 channels each)
ReportIntegrated report generator for PDF export
Process connection6 mm quick connector
HousingPC, Al alloy
Electrical connectionM12, USB-C, RJ45
Protection classIP54
Water Inlet6 mm connector
Dimensions470 x 365 x 181 mm
Weight11 kg
Operating conditions
Measuring MediumCompressed breathing air
Sample Flow Rate6 LPM@4 MPa(g), depends on input pressure
Sample rate1 sample/sec
Medium temperature0 ... +45 °C
Medium humidityMedium humidity < 40 % rH,
no condensation
Inlet Pressure0.4 ... 1.5 MPa(g), External pressure reducer allow up to 35 MPa process pressure
Ambient temperature0 ... +50 °C
Ambient humidity0 ... 90 % rH
Storage temperature-10 ... +50 °C
Transport temperature-10 ... +50 °C


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S605 / S606 Breathing Air Analyzer for Spot Checks and 24/7 Breathing Air Monitoring from SUTO iTEC on Vimeo.

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