All Photos(1)



MAS-100 NT® Ex with Filter

portable sampler for air monitoring in explosion hazard areas

Microbial air monitoring systems


aluminum hardware


ISO 14698, ATEX


calibrated to deliver


MAS-100 NT® Ex


air monitoring
food and beverages

Related Categories


The MAS-100 NT® Ex with filter is specially designed for use in explosion proof areas. The MAS-100 NT® Ex has received ATEX Conformityand can be used in zone 2 and gas groups 11A,11B, and 11C in temperature classes T1 to T4. The MAS-100 NT® Ex with filter microbial air monitoring systems are high performance, portable, battery operated instrument which are based on the principle of the Andersen air sampler. These compact yet sophisticated devices are the preferred choice for those demanding the highest quality in microbial air monitoring. A preselected amount of air is aspirated through a 300-hole perforated lid and impacted onto the surface of growth media in standard 90-100 mm Petri dishes or 55-60 mm contact plates. Microorganisms are collected on the culture media and, after an appropriate incubation period, the colonies are counted. The system measures the airflow and regulates it to a constant value of 100 standard litres/min A Standard Liter per Minute (SLPM) is adjusted to a specific environmental temperature and pressure, this ensure the amount of air sampled is always the same indipendant of environmental conditions.. These systems have the highest airflow accuracy of ± 2.5 %, compared to others that can be as high as ±10 %. The integrated flow sensor allows the user to freely interchange the perforated lids without affecting the accuracy or the calibration of the unit. The MAS-100 NT® Ex is powered by a Lithium ion rechargeable battery with an intelligent charging program that assures long battery life without routine discharging. If instruments are used in different cleanroom classes, there is a minor risk that particles may be carried over inside an instrument. In this case, a MAS-100 NT® Ex with Filter equipped with with a HEPA H13 particle filter at the exhaust prevents any potential transfer of particles from higher to lower contaminated areas. The filtration efficiency of 99.95% has been verified under worst case conditions. Furthermore the filter has no significant influence on the airflow calibration and therefore microbial sampling efficiency. In addition, stressing the filter for a simulated year of heavy usage in an uncontrolled environment does not reduce the filtration efficiency and won′t clog the filter. It is recommended to replace the filter on a yearly basis by a new HEPA H13 Filter, 74 mm for MAS-100 NT®/MAS-100 NT® Ex with filter.


The MAS-100 NT® Ex w. filter microbial air sampler is used for environmental monitoring of ambient air in explosion hazard areas. Microbial air sampling devices are extensively used in Pharmaceutical and Personal care industries as well as Food, Beverage and Environmental applications.


1 unit


1 unit in hard carrying case, battery, 300-hole perforated lid, dust cover, mains charger, USB cable, 3 mm allen key, and USB stick with all documentation


MAS-100 NT is a registered trademark of MBV AG

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Quality

Enter Lot Number to search for Certificate of Quality (COQ).

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service