Soil Respiration Meter
The meter measures the CO₂ that soil releases into a 1 L chamber, for soil respiration and carbon cycle studies.
Louise Corscadden, PhD
Director of Science · ConductScience
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Key Specifications
Full details →- CO₂ Measurement
- 0 to 5000 ppm; resolution 0.1 ppm; accuracy 3 ppm
- Temperature Measurement
- −20 to 80 °C; resolution 0.1 °C; accuracy ±0.2 °C
- Humidity Measurement
- 0 to 100% RH; resolution 0.1%; accuracy ≤1.8%
- Photosynthetically Active Radiation (PAR)
- 0 to 3000 μmol·m⁻²·s⁻¹; resolution 1 μmol·m⁻²·s⁻¹; accuracy <5 μmol·m⁻²·s⁻¹; response wavelength range 400 to 700 nm
- Standard Chamber
- 1 L headspace; rigid PVC (UPVC) shell, 304 stainless steel lining
- Operating Conditions
- 0 to 50 °C; 0 to 100% RH, non-condensing
The standard chamber presses 50 mm into the soil and holds 1 L of air above it. A pump draws that air through the meter, which reads its CO₂ continuously.
The meter also measures temperature, relative humidity and the photosynthetically active radiation (PAR) reaching the site. It stores its readings for export to a computer, where you can analyze or print them.
To log soil moisture, temperature and electrical conductivity beside each chamber, use our Soil Three-Parameter Tester. For soil water potential, use our Digital Soil Water Potential Meter.
CO₂ Measurement
- 0 to 5000 ppm; resolution 0.1 ppm; accuracy 3 ppm
Temperature Measurement
- −20 to 80 °C; resolution 0.1 °C; accuracy ±0.2 °C
Humidity Measurement
- 0 to 100% RH; resolution 0.1%; accuracy ≤1.8%
Photosynthetically Active Radiation (PAR)
- 0 to 3000 μmol·m⁻²·s⁻¹; resolution 1 μmol·m⁻²·s⁻¹; accuracy <5 μmol·m⁻²·s⁻¹; response wavelength range 400 to 700 nm
Standard Chamber
- 1 L headspace; rigid PVC (UPVC) shell, 304 stainless steel lining
Operating Conditions
- 0 to 50 °C; 0 to 100% RH, non-condensing
Chamber Dimensions
- 160 × 110 × 240 mm overall; soil insert 94 mm diameter × 50 mm deep; headspace 94 mm diameter × 145 mm tall
Setup Guide
What happens if the tubing blocks during a run?
The meter shuts off its pump and raises a fault alert. A built-in electronic flowmeter detects the blockage.
Can it measure respiration from samples other than soil?
Yes. Optional chambers in other volumes measure respiration of fruits, vegetables, insects and seeds. Request a quote to add one.
Should I remove plants inside the chamber?
Yes, when you want soil respiration alone. Living leaves and stems inside the chamber add their own respiration to the CO₂ reading.
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