More Data, More Control: Only with Firefly PEMS

What is GlobalMRV’s Firefly Portable Emissions Measurement System (PEMS)?

Firefly is a unique 24/7 data acquisition technology that monitors vehicle performance, exhaust emissions and external impact factors in real driving environments (RDE).

Because Firefly tests mobile and combustion engines at a fraction of the cost per data hour of established technology, engineers can conduct more tests, gain more insight, and make more informed decisions. Testing more than 50+ impact factors, Firefly PEMS robust data analytics solutions can help manufacturers and businesses better gauge the environmental impact of their vehicle’s engine output.

More Accurate, Reliable, and Seamless Data Acquisition for Real Driving Environments

How does Firefly PEMS work?

Firefly PEMS can be positioned anywhere in or on the vehicle vehicle. This device hooks up with wiring, and is connected to your vehicle’s OBD port. Installed in an industry-leading 15-20 minutes, Firefly PEMS gives a smooth signal of delivery, allowing users to measure, verify, and report CO, CO₂, NO, HC, and O₂ exhaust emissions, volumes of powerful vehicle data, and other key calibration data.

Our Firefly PEMS delivers accurate and reliable emissions data all while measuring trace ambient pollutants and delivering comprehensive data reports. Best of all, Firefly can be rented as part of our Hardware-as-a-Service (HaaS) package.

Onsite, online, phone, and email support are included with a qualifying Firefly PEMS HaaS agreement.


Measures CO, CO₂, NO, HC, O₂, and More


5”H x 12”D x 16”W (130 mm x 300 mm x 400 mm)

Weight, Power, and Flow

Weight: 17.4 lbs. (7.9 kg)

Power: 12 to 15 VDC

Amperage: 1-5 amps; Average = 3.5 amps

Gas Data Sampling Rate: 1 Hertz

Sample Flow: 750 milliliters/minute

Parameters Measured and Calculated

  • Time, vehicle speed, RPM, intake air temperature, manifold absolute pressure, and/or mass airflow, intake air flow
  • Grams of pollutant per second (g/s), exhaust air flow, and fuel consumption
  • Multipoint Calibration
  • Pollutants:
    CO, CO₂, and HC: Using Dual Non-Dispersive Infrared Analyzers
    NO and O₂: Using Dual Electrochemical Cells
  • Optional:
    NO: UVRAS option available
    – Incoming and outgoing humidity measurement and compensation
    – Particulate Mass Measurement
    – Particle Number Measurement
    – Multipoint Calibration capabilities

Data Analytics

  • 50+ impact factors
  • 50+ data points every second of every test
  • 10+ gas analyses are performed every second of every test
  • Firefly data is available for review within 5 minutes of post-test data uploads.
  • GlobalMRV portal with optional additional vehicle maintenance data analytics
  • With the portal, set up customized alerts, display data over maps for instant route event insights, and create customizable dashboards to display test data for your needs
  • Downloadable raw data files displaying large datasets (can be displayed for spreadsheets)
  • Control Area Network (CAN) and CAN flexible data (CAN FD) compatible
  • Compatible with vehicle calibration software (e.g. ETAS, INCA, etc.)


Applicable operational engines include vehicles operating in real-world driving conditions, such as:

  • Lawn equipment
  • Motorcycles
  • ATVs
  • Passenger vehicles
  • Trucks and semi-trucks
  • Construction equipment
  • Marine vessels
  • Locomotives

Hardware as a Service (HaaS)

On the fence about making a Firefly PEMS purchase? Try it out with our Hardware as a Service (HaaS) rental package.

Customers looking to reap the rewards of Firefly PEMS without making a PEMS purchase outright can rent our PEMS, mini-PEMS, and iPEMS devices as part of our Hardware as a Service (HaaS) package plan.

Contact us for more information.


Easy to Deploy

GlobalMRV PEMS, iPEMS, and mini-PEMS units can set up in as little as 15 minutes


Flexible and Affordable

Our Hardware as a Service (Haas) model allows you to rent PEMS, iPEMS, and mini-PEMS for a fraction of the cost


Instant Results

Receive feedback and results instantly with our 24/7 monitoring capabilities

Ready to Get Started?

GlobalMRV helps institutions measure, report, and verify emissions for all different testing needs. Contact us today for a risk-free, complimentary consultation.