articulate and Air Quality Monitoring in One Instrument
Oconomowoc, WI - Quest Technologies, a 3M company, is pleased to introduce the EVM-7, a rugged and easy to use environmental monitor which combines several instruments into one. With the capability to simultaneously measure and log particulates (mass concentration), volatile organic compounds (VOCs), toxic gas, carbon dioxide (CO2), relative humidity, temperature and air velocity (with optional accessory), the EVM-7 provides a cost-effective solution and reduces the need for multiple instruments.
Real-Time Direct Reading Particulate Monitor
The EVM-7's unique, patent-pending dial-in impactor allows for quick selection of particulate settings PM2.5, PM4, PM10 or TSP*, without disassembly. A built-in sampling pump assists in the collection of particulates while the light scattering photometer mass concentration engine provides real-time measurement. A standard 37 mm filter cassette is utilized for gravimetric sampling and laboratory analysis.
Comprehensive Measurement with PID and Smart Sensors
Using a high-performance Photoionization Detector (PID) the EVM-7 measures volatile organic compounds (VOCs). Combined with the ability to also simultaneously measure carbon dioxide (CO2) and one toxic gas, the EVM-7 can help identify air quality issues. Additionally, the EVM-7 uses smart sensor technology, which offers automatic sensor recognition at power-on, calibration levels, service dates, temperature compensation and other sensor specific data. Sampling sessions and studies stored in the internal memory can later be downloaded into QuestSuite®Professional II for analysis, charting and graphing.
About Quest Technologies
Quest Technologies, a 3M company is a world class manufacturer and leader in the field of occupational safety, industrial hygiene and environmental instrumentation. Quest products are used in more than 80 countries worldwide. Quest has a reputation for rugged, reliable instrumentation and software systems that monitor and evaluate occupational and environmental health and safety hazards including noise, vibration, heat stress, indoor air quality and toxic/combustible gases. Quest monitoring instruments serve a variety of occupations and industries with clients in mining, research, enforcement, military, education, insurance and manufacturing business sectors.
What is Sheath Air and how does it work?
Sheath air is clean filtered air that surrounds the aerosol stream to prevent particulates from circulating or depositing within the optic chamber. Sheath air prevents contamination caused by build-up and deposits, improves response time by containing the sample, and improves maintenance by keeping the optic chamber clean.
From where does Sheath Air come?
The Nephelometer creates the sheath air by passing air through a zero filter before beginning the sample.
What is a Nephelometer?
The Nephelometer is an analytical instrument used to measure the light-scattering coefficient of atmospheric and indoor aerosols. Depending on design, a Nephelometer inherently has different levels of sensitivity. The main uses of Nephelometers relate to air quality measurement for pollution monitoring, climate monitoring, and visibility.
Types of Dust
Airborne particles are commonly either biological contaminants, particulate contaminants, gaseous contaminants, or dust.
This chart shows the types and sizes of various particulate contaminants. This information is helpful toward understanding the character of particulate pollution inside a building or in the ambient air. It is also useful for understanding the cleanliness level in a controlled environment.
Biological contaminants include mold, fungus, bacteria, viruses, animal dander, dust mites, pollen, human skin cells, cockroach parts, or anything alive or living at one time. These are the biggest enemy of Indoor Air Quality specialist because they are contaminants that cause health problems. Levels of biological contamination depend on humidity and temperature that supports the livelihood of micro-organisms. The presence of pets, plants, rodents, and insects will raise the level of biological contamination.
The Human Airway/Respriatory System
Inhalable particulate – Particles with an aerodynamic size cut point of 100 microns that deposit in the nose, mouth, pharynx, and larynx.
Thoracic particulate – Particles with an aerodynamic size cut point of 10 microns and deposit in the trachea and bronchus.
Respirable particulate – Particles with an aerodynamic size cut point of 4 microns and deposit in the lower portion of the lung sacks or bronchioles.