DELTA-T Plant Stomatometer AP4

DELTA-T Plant Stomatometer AP4 from the UKcharacteristic:

• Measurable transpiration rate and stomatal conductance of leaves

• Suitable for water use research in arid regions

• Suitable for research and teaching on plant water physiology and ecology

Structural characteristics

The instrument consists of three parts: the host, the blade chamber handle, and the blade chamber

The host is centered around a microcontroller, which is responsible for data acquisition, processing, result display, and storage of temperature, humidity, and light quantum sensors in the leaf chamber handle and leaf chamber

The host panel has a display, operation keyboard, and air inlet, and there is a flow meter on the side

DELTA-T Plant Stomatometer AP4 from the UKFunctional Features

• Non detached measurement of blades is possible

Good user interface, easy to operate. Users can freely modify the names of the measured items

• LCD display test project name, date, time, measurement data, and results

• Can store 1400 measurement results

The RS232 interface can transfer stored data to a PC for further processing

Lightweight and portable, equipped with rechargeable batteries, suitable for outdoor work use

DELTA-T Plant Stomatometer AP4 from the UKApplication scope:
·Research on the characteristics of plant transpiration;
·The influence of environmental conditions (light, temperature, water) on plant transpiration;
·Under adverse conditions, using plant stomatal conductance to evaluate urban air pollution status;
·Global changes, especially plant physiological and ecological responses in response to increasing greenhouse gas concentrations;
·Target plant screening, using plant stomatal conductance to screen drought resistant plants, pollution resistant plants, etc.
Technical specifications:
Measurement range of stomatal conductivity: 5.0-1200 mmol/㎡/s;
Resolution: 0.01-0.1mm/s;
Accuracy: ± 10% (5-800 mmol/㎡/s), ± 20% (800-1200 mmol/㎡/s)
Measurement range of stomatal conductivity: 0.25-30.0 mm/s;
Resolution: 0.01-0.1mm/s;
Accuracy: ± 10% (0.25-20.0 mm/s), ± 20% (20.0-30.0 mm/s)
Measurement range of stomatal resistance: 0.2-40 s/cm;
Resolution: 0.01 to 0.1;
Accuracy: ± 0.2 s cm-1 (0.2-0.5 s/cm), ± 10% (0.5-40 s/cm)
Relative humidity measurement range: 0-100%;
Resolution: 0.1;
Accuracy: ± 4%
Sample room temperature measurement range: -5 to+55 ℃;
Resolution: 0.1;
Accuracy: ± 0.7 ℃ (0~+50 ℃)
Measurement range of temperature difference between sample room and leaves: -5 to+5 ℃;
Resolution: 0.1;
Accuracy: ± 0.2 ℃ (0~+50 ℃)
Measurement range of photon flux: 0-2500 μ mol/m2/s;
Resolution: 10;
Accuracy: ± 15%
Measurement unit for porosity: mmol/m2/s, mm/s, cm/s;
Pore resistance: s/cm, s/m, m2 s/mol
Sample chamber groove shape: 2.5 × 17.5 millimeters; Circular: Diameter 6mm
Relative humidity sensor: Vaisala 16663hm
Temperature sensor: high-precision 100k thermocouple
Light sensor: unfiltered GaAP photodiode
Cable length: 1.2 meters
Size: 110 × 30 × 27 millimeters
Weight: 130 grams (including cable)
Storage capacity: approximately 1500 readings
Data interface: RS232 interface, baud rate 9600

DELTA-T Plant Stomatometer AP4 from the UKSoftware: Used for the Windows operating system, the recorded data can be downloaded as comma separated ASCII data files (CSV)
Display: 8 lines x 40 characters LCD
Key: 13 function keys, standard keyboard
Size: 300 × 200 × 140 millimeters
Weight: 3 kilograms
Battery: Built in battery, capable of continuous operation for 20 hours
Charger: 12-15V DC, 0.5A, 110, 220 or 240AC power supply (when ordering)
Charging time: 14 hours
Host: equipped with pneumatic system and analysis and calculation system

DELTA-T Plant Stomatometer AP4 from the UKSensor head: consists of two leaf chambers, one slot shaped and the other circular. Suitable blade chambers can be selected for different shapes of blades, and the sensing head contains micro electric heating regulators, RH sensors, and PAR sensors
Calibration disk: a specially cast polypropylene plastic disk with six sets of small holes of precise diameter, covered with damp filter paper, providing a water vapor source that diffuses through the holes at a known rate