The MINI-PAMII/POROMETER is a new leaf-clip for the MINI-PAM-II for combined measurements of stomatal conductance and chlorophyll a fluorescence. It measures water evaporation and stomatal conductance of plant leaves and needles to determine stomatal function, which is strongly influenced by stress factors acting on the plant.

Numerous sensors: humidity sensors, leaf-temperature sensor, pressure sensors, flow sensors, PAR-sensor, GPS receiver, accelerometer, gyroscope, magneto scope, ambient CO2-sensor
Very silent pump
Pressure of closing mechanism is adjustable
Dark shield for easy determination FV/FM and measurements with controlled actinic light intensities

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Type of Instrument Leaf Porometer

The MINI-PAMII/POROMETER represents a powerful and versatile tool for a range of applications, including rapid screenings, high-throughput stress evaluations, and detailed plant analyses. It seamlessly integrates with well-established protocols such as induction-curves or light-curves, providing researchers with a comprehensive platform for plant studies. Its lightweight and compact design make it well-suited for research conducted both in the field and laboratory settings.

Equipped with advanced sensors including GPS, accelerometer, gyroscope, and magnetoscope, the porometer enhances data collection by incorporating geospatial information. This includes details such as the angle of incidence of sun radiation and leaf angle, offering a more comprehensive understanding of environmental conditions and plant responses. The MINI-PAMII/POROMETER is designed to be a robust and adaptable tool, enabling researchers to conduct thorough analyses across diverse settings.

The porometer ensures rapid data delivery, with information transmitted every second. The duration of a typical measurement varies based on conditions such as flow rate and sample characteristics. At a standard flow rate of 100 µmol s⁻¹ and an anticipated stomatal conductance of 100 mmol m⁻² s⁻¹, the average measurement time is less than 15 seconds. The porometer includes an automatic stability determination feature, particularly beneficial for single-field measurements. Users can simply press the button, wait for the data to meet stability criteria, and the measurement is automatically executed. An optional acoustic signal can be included for added convenience. This streamlined process enhances efficiency in obtaining precise and timely measurements.

Sample area: 1 cm diameter
Flow rates: 40; 60; 80; 100; 120; 140; 160; 180 or 200 μmol s-1
RH sensor accuracy: typ. 20-70 % RH ±1.0 % RH; <20 % RH and >70 % RH ±1.5 % RH; ΔT = ±0.1 °C
Pressure sensor accuracy: ±1 hPa
Leaf temp. sensor accuracy: ±0.3 °C, emissivity adjustable 0.1000-1.000 without the need of recalibration
Ambient CO2 sensor accuracy: ±(30 ppm, +3% of reading)
Flowmeter accuracy: ± (1.5 % RD + 0.15 % FS)
GPS receiver accuracy: 2.0 m CEP (circular error probable)
Micro quantum sensor: LS-B sensor for selective PAR meas-urement, range 0 to 7000 μmol m-2 s-1, cosine corrected for light incident at an angle between -30 ° to +30 from surface normal,
Parameter: gs [mmol m-2 s-1]; gt [mmol m-2 s-1]; gb [mmol m-2 s-1]; H2Oin [mmol mol-1]; H2Oout [mmol mol-1]; dH2O [mmol mol-1]; Match [mmol mol-1]; chamber pressure [kPa]; TLeaf [°C; Flowin [μmol s-1]; Flowout [μmol s-1]; VPD [Pa kPa-1]; E [mmol m-2 s-1]; PAR [μmol m-2 s-1];
Operating conditions: -5 to +45 °C; 0-90 % RH (non-condens-ing); 300-1100 hPa
Cable length: 75 cm

Dimensions: 24 cm x 7.5 cm x 14 cm (max L x W x H)
Weight: 450 g (excluding cable)
Subject to change without prior notice
12.2 Transport Case PORO/T
Design: Black case with custom foam packing
Dimensions: 31 cm x 26.5 cm x 11 cm (L x W x H)
Weight: 1,2 kg

Subject to change without prior notice

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