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EVM-7 Indoor Air Quality Monitor

Manufacturer: 3M
Part Number: EVM-7
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3M EVM-7 offers the unique capability to simultaneously measure particulates (mass concentration), volatile organic compounds (VOCs), toxic gas, carbon dioxide (CO2), carbon monoxide (CO), relative humidity, temperature and air velocity (with optional accessory).

Key Features

Simultaneously Measure Particulate and Gas Concentrations
  • Reduces the need for multiple instruments
  • Lowers the cost of ownership.
90° Light Scattering Photometer
  • Mass concentration engine offers real-time measurement of particulates.
Built in Sampling Pump for Gravimetric Analysis
  • Allows user to insert a 25 or 37 mm filter cassette to capture particulates for laboratory testing.
Dial-in Rotary Impactor
  • Twist and click selection of particulate settings: PM2.5, PM4, PM10 or TSP*

 *Within the instrument’s measurement range

Display Languages

  • English, French, German, Italian, Portuguese and Spanish

User Interface

  • 10 pushbuttons and 4 softkeys, menu driven

Display Type

  • Transreflective 128 X 64 LCD with backlighting

Software Compatibility

  • DMS

Standards

  • CE Mark and RoHS compliant

Particulate Impactors Size Fractions

  • PM2.5, PM4, PM10 or TSP (within the instrument’s measurement range)

Flow Rate

  • 1.67 L/min

Displayed Data

  • Measurements: Level, Minimum, Maximum, Average, Short-Term Exposure Level (STEL), Time Weighted Average (TWA)
  • Real-time measurement: Once per second display update rate
  • Time History Data Logging Intervals
    • Seconds: 1, 5, 15, 30
    • Minutes: 1, 5, 10, 15, 30, 60
  • Trend Graphing Intervals for all Parameters
    • Minutes: 1.5, 3, 15
    • Hours: 1.5, 3, 8, 12, 24
  • Status Indicators: Battery, Run, Stop, Overload and UnderRange
  • Averaging Time: 1 to 30 seconds

Size

  • 19 cm X 19 cm X 7 cm (7.5” X 7.5” X 2.75”)

Weight

  • 1.3 kg (2.9 lb)

Housing

  • Static dissipative ABS Polycarbonate housing

Tripod Mount

  • Standard photographic mount on bottom, 1/4" - 20 screw heads

Temperature Range

  • 0° C to 50° C (32° F to 122° F)

Pressure Range

  • 65 kPa to 108 kPa

Relative Humidity Range

  • 10% to 90% non-condensing

Storeage Conditions

  • Temperature: -20° C to 60° C (-4° F to 140° F)
  • Humidity: 0% to 95% RH, non-condensing

Intelligent Sensors:

  • Auto-detectable when inserted at power-off mode

Battery Pack

  • Rechargeable lithium-ion

Battery Life

  • Minimum of 8 hours under continuous operation

External DC Power Input

  • 10 to 16 Volt power inlet (nominal 12V DC) 1.5A

Power Adapter

  • Universal AC adapter 100 to 240 Volt AC, 50-60 Hz
 

Sensors:  Method / Base Units / Display Resolution / Display Range / Accuracy Repeatability

Particulates
  • 90° Light Scattering/Integrating Photometer:
    • mg / m3 0.001 0.000 - 199.9 / +/-15% (rel ARD*)
    • ug / m3 1 0 - 20,000 / +/-15% (rel ARD*)
  • Particulates Size Range:  μm / N/A / 0.1 - 10 / **
VOC: 10.6eV Photoionization Detector
  • Low Sensitivity PID select:  ppm or mg / m 3 0.1 0.0 - 2,000 / +/-5% / 2%*** at calibration level
  • High Sensitivity PID select:  ppm or ug / m 3 1 0 - 50,000 /+/-5% / 2%*** at calibration level
CO2
  • NDIR (Non-Dispersive Infrared):   ppm / 10 - 20,000 / +/-2% of signal +/-50 ppm between 0-2,500
Toxic Electrochecmical Sensor
  • CO - Carbon Monoxide Sensor:  ppm / 1 0 - 1,000 / +/-5% / 2% of signal
  • Cl2 - Chlorine Sensor: ppm / 0.1 0.0 - 20 / +/-5% / 2% of signal
  • EtO - Ethylene Oxide Sensor:  ppm / 0.1 0.0 - 20 / +/-5% / 2% of signal
  • HCN - Hydrogen Cyanide Sensor:  ppm / 0.1 0.0 - 50 / +/-5% / 2% of signal
  •  H2S - Hydrogen Sulfide Sensor:  ppm / 1 0 - 500 / +/-5% / 2% of signal
  • NO - Nitric Oxide Sensor:  ppm / 0.1 0.0 - 100 / +/-5% / 2% of signal
  •  NO2 - Nitrogen Dioxide Sensor:  ppm / 0.1 0.0 - 50 / +/-5% / 2% of signal
  •  O2 - Oxygen Sensor:  % / 0.1 0.0 - 30 / +/-5% / 2% of signal
  •  O3 - Ozone Sensor:  ppm / 0.01 0 - 1.0 / +/-10% / 2% of signal at calibration level
  •  SO2 - Sulfur Dioxide Sensor:  ppm / 0.1 0.0 - 50 / +/-5% / 2% of signal
Temperature
  • Junction Diode:
    • deg C / 0.1 / 0.0 - 60.0 / +/- 1.1 deg C
    • deg F / 0.1 / 32.0 - 140 / +/- 2 deg F
Relartive Humidity
  • Capacitive:  % humidity / 0.1 / 0.0 - 100 / +/-5% RH* of signal between 10%-90%
Air Velocity
  • Omni-directional Heated Thermistor Windprobe:
    • meter/sec / 0.1 / 0.0 - 20 / +/-0.12 m/s + 4.5% of signal
    • feet/min / 1 / 0 - 3940 / +/-23.6 ft/min + 4.5% of signal
* ARD - Arizona Road Dust, RH - Relative Humidity

** The photometer can detect particulates up to 100 μm; however, accuracy is reduced for sizes greater than 10 μm.

*** Relative Isobutylene

All specifications subject to change

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