Transpiration rate measuring instrument IN-ZT20

Transpiration rate measuring instrument

Instrument usage

Plant stomata meter is a scientific research type plant stomata meter that uses open circuit measurement. Used to measure the influence of various factors on leaf stomatal behavior, it can conveniently, repeatedly, and accurately calculate stomatal impedance, stomatal conductance, and transpiration rate. It can also measure air temperature and humidity, leaf surface temperature, and photosynthetically active radiation. Widely used in the study of water physiology in plant leaves, research on crop water use, water stress hazards, and biological control and regulation effects.

measuring principle

Principle: According to the principle of cyclic diffusion, measurement and calculation are carried out based on the changes in surface humidity of plant leaves

Measurement function

Air temperature, humidity, flow rate, light intensity PAR, leaf temperature, humidity curve, transpiration rate, stomatal conductance, stomatal impedance, gas mass flow rate

Measurement unit: Transpiration rate (Tr): mmol H2Om-2 s-1

Pore conductance (Gs): molH2Om-2.s-1

Pore impedance (Rs): sm-1

Accuracy: Transpiration 1-5%, Conductivity 5-10%

Technical Parameter

Leaf chamber temperature:

German Heraeus high-precision digital temperature sensor, measuring range: -20-80 ℃, resolution: 0.1 ℃, error ± 0.2 ℃

Leaf temperature:

Platinum resistance, measurement range: -20-60 ℃, resolution: 0.1 ℃, error ± 0.2 ℃

Humidity:

Swiss imported high-precision digital humidity sensor:

Measurement range 0-85%, resolution: 0.1%, error ≤ 1%

Photosynthetically active radiation (PAR):

Silicon photovoltaic cell with correction filter

Measurement range: 0-3000 µ mol · m-2 · s-1, accuracy<µ mol · m-2 · s-1 Response wavelength range: 400-700nm

Micro electronic flowmeter, flow rate can be set arbitrarily within the range of 0.2-1L. Resolution: 0.0001L, zero drift: ± 0.005L

Power supply: Large capacity DC8.4V rechargeable lithium battery can work continuously for 20 hours per charge. (Not connected to external light source)

Data storage: 16GB of memory, expandable to 32GB

Data transfer: USB connection to computer can directly export data

Display: 3.5 "TFT true color LCD screen color display, resolution 800 × 480, clearly visible under strong light

Button: Six buttons, easy and convenient to operate

Volume: 260 × 260 × 130mm

Weight: Host 3.25kg