Gas Scouter G4301 Gas Analyzer

The Picarro Gas Scouter™ G4301 is a new-generation, light-weight, portable, battery-powered gas concentration analyzer designed for science on the move. It is a perfect mobile solution for high-precision greenhouse gas measurements in the world’s most challenging, remote environments.

  • High-precision ppb measurements of CO2 and
    CH4 concentrations 
  • Portable, lightweight (25 pounds), low
    power (25 W) backpack case
  • Built-in rechargeable Li-ion battery
    for up to 8 hours of continuous operation 
  • Built-in WiFi for mobile operation with
    a tablet or smartphone in remote locations
  • Integrated vacuum pump for various
    field application.

The Gas Scouter simultaneously and continuously measures CO2, CH4, and H2O concentrations over a wide dynamic range, enabling effective background and emissions measurements. This makes it ideal for efficient, exact identification and quantification of greenhouse gas from biogenic and anthropogenic sources, especially in remote locations. 

The Gas Scouter is also an excellent instrument for soil flux measurements. The sampling system has an integrated pump. It can be used for continuous field mapping or in closed-loop configurations for soil chamber studies, which makes it a versatile analyzer for field applications.


Raw precision (5 sec) 0.4 ppm + 0.1% of reading
Typical = 0.15 ppm*
Precision (300 sec, 1σ) 0.04 ppm + 0.02% of reading
Typical = 0.025 ppm*
Lower Detection Limit (300 sec, 3σ) 0.12 ppm
Typical = 0.075 ppm*
Drift (24 hr, peak-to-peak 50 min average) 0.5 ppm
Typical = 0.18 ppm*
Measurement Range 0–3%
Measurement Interval 3 sec
Response Time 5 sec
(Rise/Fall Time 1090% / 9010%)
Ope  Temperature 10°C to 45°C
Ambient Humidity <85% R.H. non-condensing
Dimensions 14″ w × 18.2″ h × 6.95″ d (35.6 × 46.4 × 17.7 cm)
Sample Flow Rate Built-in vacuum pump, ~1 sl/m at atmospheric pressure
Pump Off-Gassing <0.1 ppb/min CH4
(in recirculation configuration with 1L chamber) <1 ppb/min CO2
Weight 23 lbs (10.4 kg)
Power Consumption 25 W
Battery Built-in Li-ion battery, 223 Wh, in/out 12-19 V, charge time 5-8 hours
Sample Inlet/Outlet Connections Colder non-valved quick-connect
Data Output USB (x2), Wi-Fi Connectivity
Operating System Windows 7 Professional


  •    Carbon Dioxide (CO2)

  •   Methane (CH4)


  •   Emission Quantification

  •   Agriculture & Soil Science

  •   Atmospheric Science

  •   Air Quality