Yaxin-1303 Plant Porometer is suitable for both teaching and scientific research. It can fully satisfy the measurement of plant leaf transpiration and stomatal conductance.

There are several significant advantages ，includes  high performance-price ratio, light weight, low power consumption and simple operation. The whole system also has intelligent calibration, parameter setting, fault warning, data management and a variety of measurement functions.  

Ⅰ.  Instrument Functions

1.       Measurement function: Air temperature, humidity, flow rate, atmospheric pressure, light intensity PAR, leaf temperature

2.       Calculation function: Transpiration rate, stomatal conductance

3.       Display function: Air temperature, humidity, flow rate, leaf temperature, atmospheric pressure, light intensity, transpiration rate and stomatal conductance; Humidity change curve can be displayed online in real time

4.       Software functions: Automatic flow control; Manual/automatic measurement mode; Open system and closed system mode

5.       Storage and transmission functions: 120,000 sets of measurement data and 16,000 humidity data; USB interface; Support SD card data storage

6.       Portable function: Light and portable; With rechargeable battery, it can be used in field work

Ⅱ. Technical Parameters

1.      Light quantum sensors: Type: Silicon photocell with correction filter; Range: 0-3000 μmol/m²s; Spectrum: 400-700 nm, visible light range; Resolution: 1μmol/m² s; Error: ±5%

2.      Leaf temperature sensor: Type: K-type thermocouple; Range: 0.0~50.0 ℃; Resolution: 0.1℃; Error: ±0.3 ℃

3.      Temperature sensor: Type: Thermistors; Range: 0.0~50.0 ℃; Resolution: 0.1 ℃; Error: ±0.3 ℃

4.      Flowmeter: Type: Microelectronic Flowmeter; Range: 0.3~1.0 L/min; Resolution: 0.01 L/min; Error: 5%

5.      Humidity sensor: Type: humidity sensitive capacitor; Range: 0~90% RH; Resolution: 0.1%; Error: ±1.8% RH; Response time: 15 s; Automatic temperature verification

6.      Host: Display: 320×240 dot matrix LCD; Storage: 32 G SD card + built-in 8MB flash chip; Transmission: USB 2.0; Power supply: 7.4V 10AH, rechargeable lithium battery, endurance capacity 10-12 hours; Size: 25 x 19 x 14.7 cm; Weight: 2.5 kg; Other: Support firmware upgrade

7.      Leaf Chamber (optional): 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×ø9 cm)

8.      Working environment: Temperature: 0-50 ℃; Humidity: 0-90% RH; No Condensation