Yaxin-818 Pn meter

This instrument is specially designed for photosynthesis experiment of middle school. It can quickly and quantitatively measure leaf photosynthesis or respiration.

Ⅰ、 Features

• patented products

• digital sensors

• intelligent control of environment

• projection in classroom

• colorful screen

Ⅱ、 Application

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.

Ⅲ、 Principle

The change value of CO₂ concentration in the closed chamber was measured within a certain time, and then the photosynthetic rate of leaves was calculated.

Ⅳ、 Function

1. Measurement

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

Ⅴ、 Specification

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