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CO2 Analyzer End-Tidal Biotechnology

CO2 Analyzer End-Tidal

Brand:CWE Incorporated
Product Code:Capstar-100

Need more Info? (514) 354-2511 - 1-800-463-4363

The CAPSTAR-100 Carbon Dioxide Analyzer provides continuous measurement of expired CO2 over the range 0-10 percent.

Its rapid response time, small sample flow requirements, and long-term stability make it ideal for respiratory gas measurement of rodents and larger animals.

The heart of the instrument is a miniature infrared analyzer with exceptional stability, low maintenance, and a linear output. The heated measurement cell prevents water condensation. The SENSORPOD, which contains the infrared measurement cell, attaches to the front panel by a 1.5m cable. This cell can be removed for cleaning, inspection, or replacement in minutes. The digital display shows CO2 concentration in percent or mmHg, and allows breath-by-breath peak end-tidal reading or continuous rapid response. Calibration is performed with a single calibrated gas and room air.

The reliability and ease of operation of the CAPSTAR-100 make it the perfect instrument for routine respiratory CO2 monitoring. It is the natural companion to our SAR-830 series Small Animal Ventilators for monitoring respiratory status. With the AVS-1 Advanced Ventilator System, it can control end-tidal CO2. It can also be used to monitor unassisted animals. Gas sampling rates of less than 30ml/min can be used, making it possible to monitor animals as small as rats. The fast response time of the CAPSTAR-100 allows end-tidal response plateaus with respiratory rates of 120 breaths/min or greater. A range of accessories is available to ensure easy setup and convenient operation. An accessory pack containing sample tubing, moisture traps, and Nafion® moisture-absorbing sample tubes is included with the instrument.


  • End-tidal peak or continuous readings
  • Low sample flow requirements
  • Accurate and stable monitoring
  • Linear output signal for recording



  • Respiratory monitoring
  • Use with ventilated or unassisted animals
  • Suitable for rats and larger animals
  • CO2 control with AVS-1 Ventilator



Analyzer type Single beam infrared
Sample cell materials Sapphire and stainless steel
Sample inlet connector 0.062” OD brass tube
Recommended sample tubing size 0.040" - 0.062" ID Tygon™
Measurement range 0-10% CO2
Analog output scaling 100mV/% CO2 (0-1V)
Linearity 0.1% CO2
Repeatability 0.1% CO2
Response time (T10 - T90) 100mS at 100 ml/min sampling
Response time (T10 - T90) 130mS at 50 ml/min sampling
Response time (T10 - T90) 250mS at 30 ml/min sampling
Zero stability 0.1% (8 hours), 0.2% (24 hours)
Operating temperature range 5 - 40°C
Optical bench temperature 48°C, temperature controlled
Warm-up time 5 min to 0.2%, 10 min to 0.1%
Sample rate flowmeter 10 - 50 ml/min
Maximum sample cell pressure +5 psig
Interference effects: vaporized anesthetic agents Negligible
Interference effects: 50% N2O 0.1% at 0% CO2, 0.6% at 5% CO2 (uncompensated)
Nitrous oxide compensation 0.1% at 5% CO2 (internal jumper for 25, 50, 75%)
Controls Zero, Span (10-turn dials)
Electrical requirements 120VAC/220VAC switchable, 35VA
Dimensions (main unit) 9W x 5H x 9D in., 23W x 13H x 23D cm
Dimensions (SENSORPOD) 3W x 2.5H x 3D in., 7.6W x 6.4H x 7.6D cm
Weight 10 lbs (4.5kg)

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