Plant Respiration Meter with Leaf Chamber
The plant respiration meter reads the CO₂ concentration in a leaf chamber, so you can follow the CO₂ a leaf releases in the dark.
Louise Corscadden, PhD
Director of Science · ConductScience
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Key Specifications
Full details →- CO₂ Range
- 0 to 2,000 ppm
- CO₂ Resolution
- 1 ppm
- CO₂ Accuracy
- Within 1% of full scale
- Measurement Modes
- Open system (flow-through) and closed system (recirculating)
- Leaf Chamber Air Temperature
- Measures 0 to 60 °C, 0.1 °C resolution, accuracy within ±0.5 °C
- Leaf Chamber Air Humidity
- Measures 0 to 100% RH, 0.1% RH resolution, accuracy within ±2% RH
The meter reads CO₂ from 0 to 2,000 ppm at 1 ppm resolution. Its accuracy is within 1% of full scale.
It runs as an open system, with air passing once through the chamber, or as a closed system, with the same air recirculating. An electronic flow meter measures the air flow.
Sensors also read the temperature and relative humidity of the air inside the leaf chamber and of the ambient air.
A 256 × 160 pixel LCD shows the readings. The meter is built mainly for teaching and simple experiments.
CO₂ Range
- 0 to 2,000 ppm
CO₂ Resolution
- 1 ppm
CO₂ Accuracy
- Within 1% of full scale
Measurement Modes
- Open system (flow-through) and closed system (recirculating)
Leaf Chamber Air Temperature
- Measures 0 to 60 °C, 0.1 °C resolution, accuracy within ±0.5 °C
Leaf Chamber Air Humidity
- Measures 0 to 100% RH, 0.1% RH resolution, accuracy within ±2% RH
Ambient Air Temperature
- Measures -40 to 95 °C, 0.1 °C resolution, accuracy within ±0.5 °C
Ambient Air Humidity
- Measures 0 to 100% RH, 0.1% RH resolution, accuracy within ±2% RH
Flow Measurement
- Electronic flow meter
Display
- 256 × 160 pixel LCD
Setup Guide
Does it measure photosynthesis?
No. It reads CO₂ in the leaf chamber, with air temperature and humidity. For photosynthesis rate, stomatal conductance and transpiration, choose our plant photosynthesis meter.
What is the difference between an open and a closed system?
In an open system, air passes once through the chamber at a measured flow rate. In a closed system, the same air recirculates between the chamber and the meter, so CO₂ from a leaf in the dark builds up over time.
How do I calculate a respiration rate from the readings?
In a closed system, note how fast CO₂ rises. Use that rise, the volume of the closed loop and the leaf area in the chamber to calculate respiration per unit leaf area.
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