Yaxin-818 Photosynthesis Meter
This instrument is specially designed for photosynthesis experiment of middle school. It can quickly and quantitatively measure leaf photosynthesis or respiration. It can meet the need of The testing of leaf photosynthetic and respiration rates，curve Pn-par，effective of CO2 concentration and temperature to pn. The instrument can also be used in SMART projects, additional characteristic courses, laboratory and training of teacher skills.
I. Instrument Functions
1. Measurement function
CO2 concentration, Humidity, Temperature, Leaf surface temperature, Light intensity (PAR), Flow rate
2、calculation
Photosynthetic / respiratory rate (Pn value)
3. Display
Pressure (P), Chamber volume, Leaf area, Light intensity (PAR), CO2 concentration, Time, air temperature (Tair), ΔCO2, photosynthetic rate (Pn)
4. Control
Six level of PAR can be selected. Three level of the light-adaption time can be adjusted.
5. Software
projection; data transmission without installation
6. Power
Rechargeable battery; low voltage alarm
Ⅱ. Technical Parameters
1. CO2 sensor
type: diffuse infrared analyzer; Range: 0.0-3000.0 ppm; Resolution: 1.0 ppm; Accuracy: ± 10.0 ppm; Response time: 2 s
2. Air temperature sensor
Category: Digital IC sensor; Range: 0.0～50.0 ℃; Resolution: 0.1℃; Error: ± 0.5 ℃
3. light source
Category: white LED, integrated with chamber; Range: 0-1500 μ mol/m2s; Gear: 6 adjustable； Illumination area: 12cm2
4. Power
Battery: 7.2 V 10.0 Ah rechargeable lithium battery, 7 ~ 9 h service life
Power adapter: 8.4 V 2.0 A lithium battery power adapter
5. Leaf chamber
Volume: 150 mL
6. host
Monitor: 800 × 600 touch screen；Transmission: USB 2.0; size: 34 × 20 × 17 cm; weight: 3.0 kg; other: Memory: 4000 sets measurement number; support firmware upgrade
7. Working environment
Temperature: 0.0 ~ 50.0 ℃; humidity: 0 ~ 90% RH, no condensation
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