S157 CO2 Analyzer 0-2000ppm

The S157 CO2 Analyzer is a single channel non-dispersive infrared CO2 analyzer that measures CO2 in 0 to 2000 ppm range with 1 ppm resolution.  This CO2 Analyzer is ideal for CO2 exchange measure

  • Product Name:S157 CO2 Analyzer
  • Model:S157
  • Maunufactor:Qubit
  • Country:CA

The S157 CO2 Analyzer is a single channel non-dispersive infrared CO2 analyzer that measures CO2 in 0 to 2000 ppm range with 1 ppm resolution.  This CO2 Analyzer is ideal for CO2 exchange measurements with leaves, insects, small animals or organisms with a low metabolic rate or for environmental monitoring.

The S157 CO2 analyzer can be used in monitoring of greenhouse and  growth chamber CO2 levels.  It is rugged and portable for use in the lab or field (with optional battery pack). The analyzer may be used in a flow-through gas exchange configuration for instantaneous and continuous measurements of CO2 exchange. It can also be used in an injection mode with an injection septum for measurements of CO2 levels in gas samples collected earlier.  For measurements of extremely small changes in CO2 levels the analyzer can be used in stop flow or closed system modes.  The S157 CO2 Analyzer can be purchased with a built in gas pump (S157-P) or with a built in gas pump and flow monitor (S157-FP).  The S157 CO2 Analyzer shares the same infrared technology as the S158 CO2 Analyzer.  It can also be used as part of Qubit Systems’ CO2 Control System for regulating pCO2 in growth cabinets or other chambers. We recommend using S157 with  C901 Logger Pro software.  Other data acquisitions software can also be used.


  • Switchable ranges of 0 – 500 ppm and 0 – 2000 ppm CO2

  • 1 ppm carbon dioxide resolution on digital display

  • Non-dispersive infrared technology

  • Modulated infrared light source = no moving parts

  • 0 – 5 V analog output at both range settings

  • Optional battery pack for field use

  • Optional gas pump and flow monitor

  • Compact and portable

  • Weatherproof rugged case


  • Photosynthetic measurements

  • Respiration of roots and soil samples

  • Respirometry of insects and other invertebrates

  • Head space analysis of cell cultures

  • Atmospheric monitoring and control

  • Dissolved CO2 measurements


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  • Sadeghi‐Namaghi S, Amiri‐Jami A, Shoor M  Aphidsuitability for the predatory hoverfly Episyrphus balteatus alteredwith elevating atmospheric CO2 and sinigrin. EntomologicalScience 21: 12-21 (2019)

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  • Piechowicz B et al. The smell of beer as a factoraffecting the emission of carbon dioxide by Arion lusitanicus auct.non-Mabille Ann. Anim. Sci., Vol. 16:  p463–476 (2016)

  • Maliszewska J, Tegowska E. Capsaicin as anorganophosphate synergist against colorado potato beetle (Leptinotarsadecemlineata Say) Journal of Plant Protection Research 52:  p28-34 (2012)

  • Celikel F.G. et al. Temperature, ethylene and thepostharvest performance of cut snapdragons (Antirrhinum majus):Scientia Horticulturae 125 (3):429-433 (2010)

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  • BusiMV, Maliandi MV, Valdez H, Clemente M, Zabaleta EJ, Araya A, Gomez-CasatiDF.  Deficiency of Arabidopsis thaliana Frataxinalters activity of mitochondrial Fe-S proteins and incudes oxidativestress.  The Plant Journal 48: 873-882 (2006)

Operating principle:       Non-dispersive infrared

Gas sampling mode:      Flowing gas stream, sealed chamber

Maximum gas flow rate:      650 mL/min

Measurement range (LCD display):      0 – 1999 ppm

Analog output, low sensitivity:      0 – 2000 ppm

Analog output, high sensitivity:      0 – 500 ppm

Accuracy:      Better than ± 2% of full scale

Repeatability:       Better than ±1% of reading

Response time :      (@ 250 mL/min; to 95% of final value) ca. 45 sec Warm up time (@ 22oC)   ca. 5 min

Output (linear) for Low Sensitivity setting:      0 – 5 VDC for 0 – 2000 ppm

Output (linear) for High Sensitivity setting:      0 – 5 VDC for 0 – 500 ppm

Calibration adjustments :        Zero and Span

Operating temperature range:      0 to 50oC

Storage temperature range:       -40 to 70oC

Operating pressure range:      ±1.5% local mean pressure

Humidity range:      5 to 95% RH, non-condensing (recommend drying gas stream)

Pressure dependence:       +0.19% reading per mm Hg

Power requirements:      12 VDC via 120 VAC/60 Hz adapter

Current requirements:      175 mA average, 450 mA peak

Dimensions:      (cm)  (H x W x D: 25.4 x 10.2 x 15.2)

Weight:      2.2 kg

Warranty:      1 year limited