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Met One Instruments Industrial Hygiene Products

Tools to Monitor INDUSTRIAL air quality

Met One Instruments offers selected sensors and handheld devices useful in ensuring Industrial Hygiene systems operate smoothly and efficiently. Our meteorological instruments measure wind, temperature, barometric pressure, and relative humidity to help a system know when and how to operate. Other devices monitor particulates in the system to help ensure it is running cleanly and efficiently. Data from our monitors can help determine when maintenance is needed—whether that be duct cleaning, a filter change or other intervention. Met One Instruments sensors and monitors are affordable and reliable.

Heating, air conditioning and ventilation units as well as their ducts can be sources of mold, fungi, and other microbial pollutants, dust particles, secondary smoke and organic material. Testing and cleaning HVAC systems in general, and the ductwork in particular, are achieved through various methods. Typically, the “loosened” particulate matter is drawn throughout the HVAC systems, both prior to and after cleaning. Indoor air quality in an HVAC application can quickly be determined before and after the cleaning process with a particle counter. Additionally, a particle counter can be used to verify equipment performance in building management as well as inspect equipment and ducting. Met One’s handheld models the 804 or GT-324 are particularly ideal for HVAC applications.

Industrial Hygiene Products:

  • Benchtop Particle Counter BT-645

    Met One Instruments’ BT‐645 Benchtop Particle Counter has been designed to continuously measure and record particulate information for indoor work place and public space environments. Our BT-645 optical sensor, matched electronics and backlit display, are enclosed in a rugged metal...

  • The ES-642 Remote Dust Monitor

    Remote Dust Monitor ES-642

    Met One Instruments’ ES-642 Remote Dust Monitor is an industrial air-quality sensor designed to provide real time particle concentration measurements in both indoor and outdoor environments. Our ES-642 measures particulate concentration using a highly sensitive forward scatter laser nephelometer, which...

  • Bench-Top Particle Counter BT-620

    Our BT-620 Bench-Top Particle Counter provides a full feature set in a lightweight convenient size. This Counter monitors 6 particle sizes, includes a built-in printer, is battery or AC operated in a stainless-steel case. The 620 flow rate is 1.0...

  • BT-610 Bench-Top Particle Counter - Met One Instruments

    Bench-Top Particle Counter BT-610

    The BT-610 is a compact battery-operated particle counter with six selectable size channels and built-in printer all housed in a portable stainless-steel case. Flow rate is 0.1 cfm (2.83 lpm) and is maintained with volumetric flow control for improved accuracy.

  • GT-526S Handheld Particle Counter - Met One Instruments

    Handheld Particle Counter GT-526S

    Met One Instruments’ GT-526S is a full-featured, six-channel battery-operated, portable particle counter that provides the functionality of a bench unit with the convenience of a handheld. The six-channels can be configured to factory calibrated standard sizes or user defined custom...

  • Handheld Particle Counter GT-521S

    The GT-521S is a full-featured, battery-operated, portable particle counter that provides the functionality of a bench unit with the convenience of a handheld. This powerful device supports cumulative or differential counts, standard concentrations, total counts and count alarms. It can...

  • GT-324 Handheld Particle Counter

    Met One Instruments, Inc.’s Model GT-324 particle counter is a full-featured handheld particle counter that provides the functionality of a bench unit in a portable package. A fully integrated RH/Temp sensor immediately provides data to your displayed and logged data....

  • Model 804 Handheld Particle Counter - Met One Instruments

    Handheld Particle Counter Model 804

    Met One Instruments’ 804 handheld particle counter is a 4-channel portable particle counter that counts particles 0.3 microns to 10.0 microns – giving you portability and reliability at very competitive pricing. Though compact, this unit is completely self-contained with its...

  • Aerocet 531S Handheld Particle Counter

    Aerocet 531S Handheld Particle Mass Profiler & Counter

    The Aerocet 531S is a full–featured, completely portable, battery operated, handheld mass monitor or particle counter. This unit provides particle counts or mass PM measurements as stored data logged values, real-time networked data, or printed results.

  • Aerocet 831 Handheld Particle Counter - Met One Instruments

    Aerocet 831 Handheld Particle Counter

    The Aerocet 831 is a completely portable, full–featured, battery operated, handheld mass monitor. This device simultaneously provides five critical mass ranges (PM1, PM2.5, PM4, PM10 & TSP) in one minute from start up. Survey the environment with the easy to...

  • 083E Relative Humidity Sensor & 085 Relative Humidity : Temperature Sensor

    Relative Humidity Sensor 083F & Relative Humidity / Temperature Sensor 085A

    The 083F Relative Humidity Sensor is a highly sensitive and stable temperature measurement tool that provides outstanding accuracy. It is reliable in the full range of relative humidity conditions, from 0-100%, performing equally well in meteorological, industrial, laboratory and other...

  • 5980 Radiation Shield

    Radiation Shield 074

    Met One Radiation Shields reduce errors in temperature and relative humidity measurements that are caused by direct solar radiation. They are constructed of a series of white aluminum concentric plates, which allow air flow to pass through the shield, while...

  • 092 Barometer Pressure Sensor

    Barometer Pressure Sensor 092

    The 092 Barometric Pressure Sensor measures absolute atmospheric pressure and converts it into a linear, proportional voltage, using digital computer technology. The 092 features robust, low maintenance construction that will withstand a wide range of adverse weather conditions, and consistently...

  • Swift 6.0 Flow Meter

    The Swift 6.0 is a multi-function Flow Meter specifically designed for accurate low rate measurements. The device’s easy to read display shows Flow Rate, Flow Temperature and Ambient Pressure. Flow measurements are traceable to our NIST standard and Certification is...

  • Met One Instruments


    Met One Instruments’ OEM Sensors signal a continued commitment to protecting and preserving health and wellbeing in a world increasingly threatened by airborne particulate. These optical devices start from simple low cost analog samplers easily integrated into existing systems to...

  • Particle View RT Software

    Particle View RT software includes all of the functions required for recording real time data, viewing data (both real time and historical), and producing tabular and graphic reports needed for most users of clean rooms and controlled environments. It is...

  • Particle View Software

    Particle View software includes all of the functions required for the downloading, viewing of data, and production of both tabular and graphic reports. It is designed for use with the Met One Instruments, Inc. line of hand held and bench top...

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