Plant Photosynthesis Meter

Application

The instrument can be used to calculate the rate of photosynthesis (respiration) and transpiration, stomata conductance, internal CO₂ concentration of leaf, as well as obtain the efficiency of quantum of light or water efficiency etc..

Features:

l  To observe and measure the photosynthesis and transpiration of a plant leaf on or off the stem

l  Open or closed way for measure of the rate of photosynthesis

l  To calculate the rate of photosynthesis (respiration) and transpiration, stomata conductance or internal CO₂ concentration by appropriate formula

l  All stored data transmitted to a computer.

l  Easy to take for use indoors and outdoors

Specification

i. CO₂ sensor

Type: Non-diffusion infrared analyzer

Range:0 – 1500 ppm

Resolution: 0.1 ppm

Noise: Average noise≤0.4 ppm, maximum noise<0.8 ppm at normal CO₂ oncentration

ii. Quantum of light sensor(PAR)

Type: Silicon photosensitive cell with filter of quantum of light modification in effective photosynthesis

Range of measurement: 0 - 2500 μmol / m² ·s

Range of spectrum: 400 – 700 nm

Resolution: 1μmol / m² ·s

Error: ±5%

iii. Leaf temperature sensor

Type: Thermocouple

Range of measurement: 0 – 50 ℃

Resolution: 0.1 ℃

Error: ±0.3 ℃

iv. Air temperature sensor

Type: Thermo sensitive resistance

Range of measurement: 0 - 50 ℃

Resolution: 0.1 ℃

Error: ±0.3 ℃

v. Flow meter

        Type: Miniaure electronic flow meter

        Range: 0 – 1 L / min

        Resolution: 0.01 L / min

        Error: ±5%, (<±0.2% within 0.2 – 0.8 L / min )

 vi. Humidity sensor

        Type: Humid sensitive capacity

        Range: 0 - 100% RH

        Resolution: 0.1%

        Error:  <±2%RH ( within 0 - 80%RH ), <4 % RH ( within 80 - 100%RH )

 vii. Instrument

        Display: 240×128 lattice, interface in Chinese

        Data store: 64K

        Data transmission: RS232, RS232-USB

        Power supply: 7.4V 10AH Rechargeable Li battery,working time: 8– 10 hr with one recharge

        Dimension: 32.0×13.5×29.6 cm

        Weight: Instrument 4.0 Kg, Leaf chamber with handle 1.0 Kg

viii. Leaf chamber ( One option only)   

        Type I (25×25 mm)

        Type II (55×20 mm) 

        Type III  ( 65×10 mm )

ix. Accessories

 Range of illumination: 0 - 2500 μmol / m² ·s

 Spectrum: 400 – 700 nm

 Display: Liquid crystal display

 Battery: DC 12V, 7 HA Rechargeable acidic Pb battery

 Dimension: Instrument 178×127×8 mm,

illumination area 100×45×45 mm

 Weight: 4.2 Kg ( With a lamp)