S157 CO2 Analyzer 2000ppm

S157 CO2 Analyzer 0-2000ppm

The S157 CO2 Analyzer is a single channel flow-through non-dispersive infrared CO2 analyzer that measures CO2 in the 0 to 2000 ppm range with 1 ppm resolution.  The range can be extended to 0 – 1% CO2, if requested.  The CO2 Analyzer is ideal for CO2 exchange measurements with leaves, insects, small animals or organisms with a low metabolic rate. It can also be used to measure soil respiration and for environmental monitoring. The S157 can be purchased as a stand alone CO2 analyzer with a build in gas pump (S157-P), or a built in gas pump and mass flow monitor (S157-PF).  All versions of the S157 have temperature control of the rugged case, making it ideal for field use.

The S157 CO2 analyzer can be used for monitoring 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 injection mode with a septum for measurements of CO2 levels in collected gas samples.  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 shares the same infrared technology as the S158 CO2 Analyzer (0-10% range).  It can be used as part of Qubit Systems’ CO2 Control System for regulating pCO2 in growth cabinets or other chambers. We recommend using the S157 with a Qubit supplied data interface and software (optional) but other data acquisition systems may also be used.

Front panel showing CO2 display, and temperature controller


CO2 analyzer connected with solenoid valve and variable volume insect chamber for stop flow measurements

  • Non-dispersive infrared sensor
  • 0 – 2000 ppm CO2 range (optional 0 – 1%)
  • Temperature control of the rugged case
  • 1 ppm carbon dioxide resolution on digital display
  • Modulated infrared light source = no moving parts
  • 0 – 5 V analog output
  • Available as stand alone, with built in gas pump (S157-P) or built in gas pump and flow monitor (S157-PF)
  • Compact and portable
  • Optional battery pack for field use
  • Weatherproof rugged case


Dr. Tymur Bedernichek and his team from National Academy of Sciences of Ukraine are studying soil respiration in Carpathian Mountains with Qubit S157-P CO2 Analyzer

Dr. A. Cemal Saydam, Hacettepe University, Turkey

“I am using one of your CO2 monitoring systems for atmospheric CO2 measurements, successfully and continuously since 2010 and would like to thank you for manufacturing such a reliable instrument. “Testimonial