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Nitric acid – HNO3

Find here the essential information on nitric acid (HNO3) or hydrogen nitrate: characteristics, effects on health, detection devices & systems – HNO3 gas detector – and proper respiratory protective equipment (nitric acid respirator gas mask or powered air respirator with E-P3 combined filter).

HNO3 gas detector and acid nitric respirator for better safety

Nitric acid properties

Nitric acid (HNO3) – also known as hydrogen nitrate – is mainly used in the food industry for nitrogen fertilizers production. It is also used to produce explosives and nitrous compounds. This substance can be used in pharmaceutics, in the steel industries and also for metals treatment (pickling, scraping).

CASTWA (8 hours)STEL (15 minutes)LELIPDensity / AirFilter / SCBA
7697-37-2– 1 ppm11.95 eV2.2E-P3

Nitric acid effects on health

At normal temperature and pressure conditions, nitric acid (HNO3) is a colorless liquid with a suffocating smell and can be detected at extremely low concentrations. It is toxic by inhalation (H331), corrosive for the respiratory tracts and can cause severe chemical burns and damage the eyes. The IARC* classified this gas in category 1 as it revealed links between chronic exposure and several forms of cancer.

*IARC: International Agency for Research on Cancer (depends on WHO World Health Organization)

HNO3 gas detector (Nitric acid)

Even if nitric acid gas can be detected through smell, only a HNO3 gas detector can accurately measure concentrations of this extremely toxic gas. Thus a ppm or ppb nitric acid detection device should be selected to monitor concentrations.

SIL 2 approved ATEX gas detector to detect the combustible gases (IR or catalytic), CO2 (IR), toxic gases (electrochemical), solvents or freons (semiconductor) and asphyxiating gases (oxygen deficiency).

  • Fixed gas detector OLCT100

Fixed gas detector – OLCT100

SIL 2 approved ATEX gas detector to detect the combustible gases (IR or catalytic), CO2 (IR), toxic gases (electrochemical), solvents or freons (semiconductor) and asphyxiating gases (oxygen deficiency).

Fixed gas detector OLCT100
  • Detection of hydrocarbons, solvents, toxic gases, freons, VOC, CO2
  • Housing made of aluminium with epoxy paint (optional 316L Stainless Steel version)
  • Outputs: OLC100: Wheatstone bridge – OLCT100: 4-20 mA linear
  • Power supply: 15.5 to 32 VDC
  • ATEX & SIL 2 approved for catalytic and infrared versions
Additional information

Thanks to the wide variety of sensor technologies that can be used with this monitor, the OLCT100 fixed gas detector can detect a large range of gases. The combustible gases can be detected with a catalytic or infrared sensor, toxic gases with an electrochemical sensor, freons with a semiconductor sensor and carbon dioxide with an infrared sensor.

Two outputs types are available for this fixed gas detector range. The first one is the 4-20 mA analog output. It can be used to detect combustible, toxic and asphyxiating gases but also solvents, freons or carbon dioxide. The second output version is a Wheatstone bridge for the detection of combustible gases (0-100% LEL only).

Many accessories are available for the OLCT100 gas detector to improve sensor response time or to get optimal implementation.

The OLC/OLCT100 range is available under 5 versions:

  • OLC100 : Wheatstone bridge output detector to detect the combustible gases (0-100% LEL only)
  • OLCT 100 XP: Explosion-proof version equipped with a catalytic, electrochemical or semiconductor sensor to detect the combustible or toxic gases or oxygen.
  • OLCT 100 IS: Extremely reliable version to detect toxic gases or oxygen.
  • OLCT 100 XP IR: Explosion-proof version equipped with an infrared sensor to detect the combustible gases or CO2
  • OLCT 100 XP HT: High temperature explosion-proof version to detect combustible gases up to 200 °C
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The colorimetric gas detection tube system is a simple and accurate solution composed by a manual sampling pump and a specific gas detection tube. They are designed for use together.

  • Gas detector tubes Colorimetric tube

Colorimetric tubes

The colorimetric gas detection tube system is a simple and accurate solution composed by a manual sampling pump and a specific gas detection tube. They are designed for use together.

Gas detector tubes Colorimetric tube
  • Accurate: the sampling pump features a mechanical accuracy piston which creates a vacuum then enables direct reading on the colored tube (colorimetric tube)
  • Swift: one or two pump strokes are enough to draw sample and the value can be directly read on the tube
  • User-friendly: no knowledge, no specific process and no technical competence are required

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Especially designed to monitor exotic gases, the X-am® 5100 single gas detector accurately detects hydrogen fluoride (HF), nitric acid (HNO3), hydrogen bromide (HBr), hydrogen chloride (HCl), hydrazine (N2H4), phosphorus oxychloride (POCl3 or PCl3) and hydrogen peroxide (H2O2).

  • Drager portable exotic gas detector

Portable exotic gas detector X-am 5100

Especially designed to monitor exotic gases, the X-am® 5100 single gas detector accurately detects hydrogen fluoride (HF), nitric acid (HNO3), hydrogen bromide (HBr), hydrogen chloride (HCl), hydrazine (N2H4), phosphorus oxychloride (POCl3 or PCl3) and hydrogen peroxide (H2O2).

Drager portable exotic gas detector
  • Lightweight (220g), robust and insensitive to electromagnetic radiation
  • User-friendly 2-button interface
  • Visual, audible (90 dB) and vibrating alarms
  • Data logging
  • ATEX, CE, IECEx, CSA us (class I, Division I) approved
Additional information

Primarily designed for use in applications like petroleum products production, packaging aseptization, refrigerant systems protection against corrosion or even the production of rocket fuel, the X-am 5100 is a portable single-gas personal detector. This small handheld monitor can continuously and accurately measure an monitor concentrations of hydrogen fluoride (HF), nitric acid (HNO3), hydrogen bromide (HBr), hydrogen chloride (HCl), hydrazine (N2H4), phosphoryl trichloride (POCl3 ou PCl3) or hydrogen peroxide (H2O2).

Small, compact, lightweight and robust, the X-am 5100 portable single-gas detector features a visual alarm at 360°, a multi-tone audible alarm of 90 dB at 30 cm and a vibrating alarm to alert every user on abnormal and hazardous concentrations of the target gas. Its rugged housing is IP54 certified which enables the X-am 5100 to be used in demanding environments with a temperature range from -20 to 50°C and a relative humidity from 10 to 90%. This portable gas detector is also schock-resistant and immune to electromagnetic emissions.

The X-am 5100 is available in three versions. The first one is powered with a rechargeable NiMH battery which gives the detector an autonomy of around 150 hours. The second version is powered with a rechargeable high capacity NiMH battery which gives the detector an autonomy of around 180 hours. Lastly, the third version is powered with alkaline batteries which give the detector an autonomy of around 150 hours runtime.

Thanks to its intuitive menu and its two ergonomic buttons the X-am 5100 portable single-gas detector is easy to use and requires no special technical skills to operate. Moreover, it can easily be placed closed to the breathing tracts thanks to its crocodile clip in order to get measured concentrations as close as possible to those inhaled by the operator.

Its integrated datalogger can store more than 100 hours of data with interval of 1 value per minute. This data can then be retrieved or transferred to a computer with an infrared interface integrated on the device.

The X-am 5100 is delivered ready for use with a charger and a calibration certificate.

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The SPM Flex is an optical calibration-free gas optical analysis system. This single point tape-based toxic gas detector can accurately (ppb measurement) and swiftly monitor the presence of a hazardous gas.

  • Honeywell SPM Flex gas monitor with optical toxic gas analysis

Toxic gas optical analysis – SPM FLEX gas detector

The SPM Flex is an optical calibration-free gas optical analysis system. This single point tape-based toxic gas detector can accurately (ppb measurement) and swiftly monitor the presence of a hazardous gas.

Honeywell SPM Flex gas monitor with optical toxic gas analysis
  • Chemcassette® technology – immune to interferences, more than 50 available gases.
  • Calibration-free, minimal maintenance .
  • Audiovisual alarm (2 thresholds).
  • User-friendly interface and gas concentration digital display.
  • UL 61010-1 / CSA-C22.2 / IEC 61010-1 certified

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Nitric acid respiratory protection (HNO3)

As nitric acid is irritating to the eyes, workers have to wear a full-face mask for short-term applications or a powered air purifying respirator - which is more comfortable - with E-P3 combined filter up to 30 times the OEL.

The X-plore 5500 is a full facepiece respirator mask especially designed to provide its users breathing and visual protection against gases and particles.

  • X-plore 5500 gas mask by Drager: dual filter respirator

Full facepiece respirator X-plore 5500

The X-plore 5500 is a full facepiece respirator mask especially designed to provide its users breathing and visual protection against gases and particles.

X-plore 5500 gas mask by Drager: dual filter respirator
  • Airtight and secured design
  • Comfortable and easy to use
  • 180° large field of view
  • Efficient ventilation system
  • Compatible with the X-plore filters range
Additional information

Especially designed to provide an optimal protection in presence of gas or particles, the X-plore 5500 full facepiece respirator is widely used in many industrial applications (particularly in the chemical and steel industries) but also shipyard industry…

Equipped with a visor made of polycarbonate or triplex glass, the X-plore 5500 mask provides its wearer a large field of vision without distortion. The polycarbonate panoramic visor features a frame made of plastics and is highly resistant to shocks while the glass visor – with stainless steel frame – is treated against scratches and chemical products.

The mask itself features a specific dual seal with triple sealing edges to offer optimal tightness and protection. The body of the dual filter gas mask is made of ultra-resistant EPDM elastomer that fits any morphology and face shape. This way, the mask remains comfortable to wear. Moreover, thanks to its unique standard size, this full facepiece respirator is easy to transport and to store.

As it is a respiratory protective full face mask, steam can appear on the visor. In order to resolve this matter, the le X-plore 5500 is equipped with a special integrated ventilation system. This system has been engineered to protect the visor against any risk of condensation in order to ensure clear view in any situation.

Thanks to its comfortable 5-point flanged harness, the X-plore 550 can be worn and removed easily and quickly. Moreover, its connecting straps have been especially designed to avoid pressure on the head or the face of the user.

The X-plore 5500 dual filter gas mask features two connectors located on both sides to connect two air filtering cartridges. Furthermore, as the filters are positioned laterally and backwards, the field of vision of the user remains perfectly unobstructed. This breathing protection equipment is fully compatible with the X-plore series bayonet filters. These filters are especially designed to provide optimal protection against harmful gases, vapors and particles. Thanks to their bayonet connection system, they can be easily and quickly installed in order to operate as soon as possible.

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The X-plore 6300 is a respiratory protective full face respirator. Cost effective, this is an ideal solution for industrial applications, providing users comfort and air purifying performance.

  • The X-plore 6300 full face respirator, a single filter gas mask by Dräger

Full face respirator X-plore 6300

The X-plore 6300 is a respiratory protective full face respirator. Cost effective, this is an ideal solution for industrial applications, providing users comfort and air purifying performance.

The X-plore 6300 full face respirator, a single filter gas mask by Dräger
  • Universal size
  • Large field of view
  • Hypoalergenic material
  • Integrated ventilation system
  • Compatible with X-plore Rd 40 filter series
Additional information

The X-plore 6300 single filter gas mask is a respiratory protective device that has been especially designed for use in industrial environments.

Made of ultra-resistant and hypoalergenic EPDM elastomer, this full face respirator features a dual airtight seal for maximal reliability, comfort and safety. Cost-effective, this mask fits perfectly in any morphology and any face shape witout annoying its wearer.

The large facepiece visor is made of PMMA plexiglass (polymethyl methacrylate) and features a plastic frame to offer a large 180° field of view without distorsion and an outstanding panoramic view. This visor is also especially treated to be scratch resistant. Moreover, the X-plore 6300 mask is equipped with an integrated ventilation system in order to avoid presence of steam and condensation inside the full facepiece.

Thanks to its universal size and its 5-point specific harness, this respirator is very easy to don and to remove. The special design of its donning straps avoids any pressure on the head or the face of the user. This way, the X-plore 6300 can be worn during long periods of time without annoying the user. taille. Furthermore, thanks to this standard size and its low weight – approximately 500 grams – the X-plore 6300 single cartridge respirator is easier to carry and to store.

Lastly, this respiratory protective full face respirator is fully compatible with X-plore Rd 40 series filters. These filters feature universal 40 mm connector threads in compliance with the EN 148-1 European standard. These filters are especially designed to purify air from any contaminant that could be harmful for the user. This filter range provides reliable and efficient protection in any situation against toxic substances – gas or particles. Thus, the X-plore 6300 single filter gas mask can be equipped with a particle filter, a gas filter or a combined filter to respond to any demanding application.

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The Duraflow powered air respirator is a versatile solution for hazardous workspaces. It provides a quality respiratory protection for a fair price.

  • The powered air purifying respirator Duraflow PAPR

Powered air purifying respirator Duraflow

The Duraflow powered air respirator is a versatile solution for hazardous workspaces. It provides a quality respiratory protection for a fair price.

The powered air purifying respirator Duraflow PAPR
  • Compatibility with RD DIN 40 universal filter cartridges
  • Rechargeable battery – 2 available version: 8 or 16 hours runtime
  • Automatic airflow regulation (160l/min)
  • Visual alarms, notifications and display
  • CEN1294 & CE0086 certified, IP55/IP67
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The X-plore 8000 is a powered air purifying respirator especially designed to provide a reliable and convenient respiratory protection solution. Fully modular, this system can operate for at least 4 hours with only one charge for safe applications.

  • The X-plore 8000 PAPR respirator system by Dräger enhanced positive pressure respirator

PAPR respirator system X-plore 8000

The X-plore 8000 is a powered air purifying respirator especially designed to provide a reliable and convenient respiratory protection solution. Fully modular, this system can operate for at least 4 hours with only one charge for safe applications.

The X-plore 8000 PAPR respirator system by Dräger enhanced positive pressure respirator
  • Rugged design for daily use
  • Modular and versatile
  • Comfortable and secured with rubber protectors
  • Easy to disassemble for easy servicing
  • Compatible with a large range of accessories
Additional information

The X-plore 800 PAPR respirator system has been especially designed to enable its user to operate safely in toxic environments. Thanks to its robust designIP65 certified against dust and water jets – this positive pressure air purifying respiratory protective device is particularly well-suited for use in potentially explosive atmospheres (ATEX).

The X-plore 8000 PAPR respirator system is composed by a rugged casing that can includes a whole range of specific PAPR filters in order to meet requirements of almost any industrial application. A breathing hose available in three different versions and a face piece (PAPR mask or hood) complete this system. The device can be worn with a special belt and can be equipped with a standard battery, which provides at least 4 hours run time, or a high capacity battery for an extended run time of at least 8 hours. The belt ensures optimal comfort of use and perfect weight balance. This positive pressure respirator has been especially engineered to fit perfectly the user without disturbance.

Available in standard version as well as ATEX certified fireproof version, the X-plore 8000 respirator features protected air inlets which ensure that no dust, water or even sparks come into contact with filters.

Thanks to its enhanced technology, the PAPR respirator system automatically detects the connected face piece in order to adjust the injected airflow. Integrated temperature and pressure sensors in the housing also enable the automatic adjustment of the airflow. A wide range of face pieces – PAPR hoods & masks - is available to meet even the most demanding requirements from any application. This way, the housing of the X-plore 8000 can be connected to half-hoods, full hoods, protective visors, helmets, half-masks, panoramic masks or even helmets specifically dedicated to welding activities.

The X-plore 8000 PAPR respirator also features a smart alarm system which purpose is to alert user in case of problems. This way, if the air flow is not sufficient or in case of low battery status, visual (operational display), acoustic (80 dBA at 1 meter) and vibrating alarms activate to alert user of the failure. Moreover, an integrated optical sensor avoids any use without a filter for an optimal safety of use.

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