Yaxin-1102G has the characteristics of high-cost performance, intelligent, light weight, and easy operation. It can fully meet the needs of researchers to measure photosynthetic rate, transpiration rate, stomatal conductance, and intercellular CO₂ concentration. The previous generation product (Yaxin-1102) has been in the market for nearly 20 years.

I. Instrument Functions

1. Measurement function: CO₂ concentration, relative humidity, leaf and air temperature, flow rate, light intensity (PAR) and atmospheric pressure

2. Calculation function: Photosynthetic rate, transpiration rate, stomatal conductance, intercellular CO₂ concentration and Light-Pn curve

3. Control function: Flow control; Control of measuring time; Open system and closed system measurement mode are optional; Manual and automatic measurement are optional; Language choice between Chinese and English

4. Software functions: Embedded flash memory chip; 2.0 USB interface; Upgrade firmware; Green installation of software

5. Portable function: Light weight and portable, suitable for the wild

6. Light control function: The photosynthetic curve can be obtained by selecting the light control module

Ⅱ. Technical Parameters

1. CO₂ sensor

Type: Non-diffusion infrared analyzer; Range: 0.0 ~ 1500.0, 0.0～3000.0 ppm optional; Resolution: 0.1 ppm; Accuracy: CO₂ is constant, the average noise ≤0.2 ppm and the maximum noise < 0.5 ppm; Response time: 15 s

2. Light quantum sensor

Type: silicon photocell with correction filter; Range: 0.0～2500.0 μmol/m² s; Spectrum: 400.0～700.0 nm, visible light range; Resolution: 1.0 μmol/m² s; Error: 2%

3. Leaf temperature sensor

Type: T thermocouple; Range: 0.0 ~ 50.0℃; Resolution: 0.1℃; Error: 0.3℃; Response time: 1s

4. Air temperature sensor

Type: thermistor; Range: 0.0 ~ 50.0℃; Resolution: 0.1℃; Error: 0.3℃

5. Humidity sensor

Type: humidity sensitive capacitor; Range: 0 ~ 90% RH; Resolution: 0.10%; Error: ±1.5 %RH; Response time: 8s

6. Flowmeter

Type: Microelectronic flowmeter; Range: 0.0 ~ 1.0 L/min; Resolution: 0.01 L/min; Error: 1%

7. Light control module (optional)

Type: LED white light; Range: 0 ~ 3500 μmol/m²s, can be set; Luminous area: 3.0×7.5 cm; automatic control by software

8. Pressure sensor

Type: integrated pressure sensor; Range: 15.0 ~ 115.0 kpa; Resolution: 0.1 kpa; Error: 1.5%

9. Power supply system

Battery: 7.2 V 10.0 AH rechargeable lithium battery, battery life 7 ~ 9 h;

Power adapter: 8.4 V 2.0 A lithium battery power adapter

10. Host

Display: 320×240 dot-matrix LCD display; 32G SD card + built-in flash chip, which can store more than 10,000 measurement data; Transmission: USB 2.0; Size: 28.0×24.5×16.0 cm; Weight: 4.0 kg; Others: Support firmware upgrade

11. Working environment:

Temperature: 0 ~ 50℃; Humidity: 0 ~ 90% RH, no condensation

12. Leaf chamber (optional one):

Type I: (25× 25 mm); Type Ⅱ: (55× 20 mm); Type Ⅲ: (65× 10 mm); Type IⅤ: mossy leaf chamber (8.4×4.5×4 cm); Type Ⅴ: cluster leaf chamber (13×?9 cm)