Manufacturer

Model

Principle

Detection limit/Sensitivity (ppm or %)

Response time (s)

Remarks

Measurement range (ppm)

CO₂

CH₄

N₂O

NH₃

Multigas monitor

Brüel & Kjaer

Model 1302

PAS¹

1.5 ppm

0.39 ppm

0.03 ppm

0.2 ppm

-

-

INNOVA^2,5

1412/1312

PAS²

1.5 ppm

0.4ppm

0.03ppm

0.1 ppm

26 s

5 - 4000 ppm CO₂

0.4 - 5000 ppm CH₄

0.03 - 300 ppm N₂O

PICARRO

G2301

CRDS

25 ppb

0.22 ppb

-

-

<3 s

0 - 1000 ppm CO₂

0 - 20 ppm CH₄

0% - 7%V H₂O

Campbell Sci

TGA200A

TDLAS

0.3 ppm

7 ppb

1.5 ppb

-

-

-

Boreal laser

Edmonton, Alberta, Canada

GasFinder 2⁷

OP-TDLAS

-

0.3 - 0.6 ppm per 100 m

-

5.32 ppm per m

1 s

-

Boreal laser

Edmonton, Alberta, Canada

GasFinder2⁵

Bomem MB100-2E

OP-FTIR

1.6 ppm per 100 m

4 ppb per 100 m

0.3 ppb per 100 m

0.4 ppb per 100 m

-

-

AirSentry FTIR

5 - 1000 m path

AirSentry FTIR⁶

OP-FTIR

43.7 ppb 300 m path

11.7 ppb 300 m path

6.3 ppb 300 m path

0.7 ppb 300 m path

Near real time

ppb to % level

MIDAC

OP-FTIR

<10%

<10%

<10%

SRI

8610C

GC³

993 ppb

131ppb

21 ppb

-

-

5000 ppm CO₂

1000 ppm CH₄

50 ppm N₂O

Agilent⁴

6280

GC⁴

-

0.01 ppm

0.005 ppm

-

-

-

Li-Cor

820

NDIR

<3%

-

-

-

-

0 - 20,000