CO2 Meter for Use with Microsensors & Dipping Probes

CO2-1 ST

This small and lightweight CO2 meter can be used with needle-type or implantable CO2 microsensors and dipping probes type CDM1 (microsensors: measurement range of 0.04 to 5 % CO2; dipping probes: measurement range of 0.02 to 5 % CO2). CO2-1 ST has temperature compensation, so most precise measurements in environments with changing temperature can be taken. The CO2 meter is operated with the PreSens Measurement Studio 2 software, which enables simultaneous control of several devices. Powered via USB no extra cables or adapters are needed. This carbon dioxide meter is the solution for most precise micro-invasive measurements in animal & plant physiology or for analyzing liquids.

  • For use with microsensors & dipping probes type CDM1
  • Controlled with PreSens Measurement Studio 2
  • Compensation of temperature & pressure
  • Lightweight (only 296 g)
  • USB-powered & small outer dimensions
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CO2 Monitoring at the Sediment-Water Interface

The PreSens CDM1 CO2 probes combined with PreSens Micromanipulators are ideally suited for profiling applications. Profiling in salt marsh ponds with our optical probes showed, that while oxygen levels are strongly affected by microbial photosynthetic activity, pH and CO2 at the sediment surface was unaffected by varying light conditions suggesting a high buffering capacity of the pond water and sediment.
(Application Note K. Koop-Jakobsen et al.)

CO2 Measurements in Plant & Animal Physiology

CO2 is an important parameter in respiration and metabolic processes. PreSens CDM1 CO2 probes are ideally suited for measurements in animal or plant research. Due to their small size, they can be integrated in many set-ups where CO2 electrodes would not fit. The graph on the left shows in vivo CO2 measurements in the haemolymph of a water-breathing dragonfly nymph.
(Application Note D. J. Lee et al.)

Monitoring CO2 in Fish Digestive Tracts

Needle-mounted PreSens fiber optic pCO2 microsensors proved to be ideal for measurements inside fish digestive tracts, as it was important to insert the sensor without rupturing the tract. The needle could be inserted through the wall of the tract directly into the desired location, allowing sequential monitoring of pCO2 in various sections of the gut. These measurements demonstrated that the pCO2 in the digestive tract is surprisingly high even in fasted fish, far above blood level, and is markedly elevated after feeding in teleosts.
(Application Note C. M. Wood et al.)



CO2 sensor CDM1 (optical ST connector)
Temperature sensor Pt100 temperature sensor connector (sensor not included)
Temperature performance From 0 °C to + 50 °C, resolution ± 0.1 °C, accuracy ± 1.0 °C
Power supply 5 VDC (USB-2.0-Mini-B, cable included)
Temperature operating / storage From 0 °C to + 50 °C / from - 20 °C to + 70 °C
Relative humidity 0 % to 80 % (non-condensing)
Dimensions 97 mm (with connectors) x 55 mm x 47 mm
Weight 296 g
Digital interface USB interface cable to PC (cable included)


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