POROMETER

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Product
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The Only Porometer with full PAM Chlorophyll Fluorescence Analysis

POROMETER

Design

leaf chamber with a circular 1 cm diameter sample area. Ventilated on one side by air with adjustable flow rate. The amount of water vapor released to the air flow is determined with high precision humidity sensors. The leaf temperature is measured by an IR sensor located in the chamber bottom. GPS information is tracked by a built-in GPS receiver. A mini quantum sensor is positioned on the sample plane. Ambient CO2 values are monitored by a CO2 sensor facing the outside, at the lower left side of the porometer. For chlorophyll a fluorescence measurements, a fiberoptics port aligns the MINI-PAM/F Fiberoptics at an angle of 60° relative to the measuring plane. Including tripod-mount.

Power supply

MINI-PAM-II leaf clip socket; The MINI-PAM-II: the 6 AA (Mignon) rechargeable batteries (Eneloop 1.2 V/2 Ah) provide power for more than 6 hours for typical experiments. The porometer alone can be operated for more than 9 hours at maximum flow. Easy battery swap possible.

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

± 0.1 kPa, noise 0.2 Pa

Leaf temp. sensor accuracy

± 0.3 °C, emissivity adjustable 0.1-1.0

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

Sensor for selective PAR measurement with the spectral properties of the LS-C sensor, range 0 to 7000 µmol m-2 s-1, cosine corrected for light incident at an angle between -30° to +30° from surface normal, internal preamplifier

Parameter

gs mmol m-2 s-1; gt mmol m-2 s-1; gb mmol m-2 s-1; H2Oin mmol mol-1;
dH2O mmol mol-1; H2Oout mmol mol-1; chamber pressure kPa, Temp (leaf) °C; Flow in/out µmol s-1; VPD Pa/kPa; E mmol m-2 s-1; PAR µmol m-2 s-1; GPS-location; GPS-orientation; sun-inclination

Operating conditions

-5 to +45 °C; 0-90 %RH (non-condensing); 30-110 kPa

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)

Far-red light
Peak emission at 735 nm
Signal detection
PIN photodiode protected by long-pass and a short-pass filters
Data memory
Flash memory, 8 MB, providing memory for more than 27000 saturation pulse analyses
Display
Backlit 160 x 104 dots (78 x 61 mm) transflective B/W LCD display with resistive touchscreen
Ports
Ports for fiberoptics, USB cable, external light source, 2035-B leaf clip, auxiliaries and 12 V DC power supply
Power supply
6 AA (Mignon) rechargeable batteries (Eneloop 1.2 V/2 Ah), providing power for up to 1000 yield measurements; 6 spare batteries, automatic power/off, battery charger (100 to 240 V AC, 50-60 Hz, 0.35 A) for 1 to 8 AA/AAA NI-MH/NI-CD batteries, 12 V 5.5 A power supply MINI PAM-II/N
Operating temperature
-5 to +45 °C (non-condensing)
Dimensions
17.2 cm x 11.2 cm x 7.6 cm (L x W x H)
Weight
1.5 kg (incl. batteries)
Measuring light
Red (655 nm) LED, modulation frequencies and PAR as described for MINI-PAM-II/B. Fluorescence at wavelengths greater than 700 nm is measured
Actinic light
Same red LED as for measuring light, maximum PAR of actinic light and saturation pulses as described for MINI-PAM-II/B
Measuring light
Blue (470 nm) LED, standard modulation frequencies 5 to 25 Hz adjustable in increments of 5 Hz and 100 Hz, measuring light PAR at standard settings = 0.05 μmol m-2 s-1. Fluorescence at wavelengths greater than 630 nm is measured
Actinic light
Same blue LED as for measuring light, maximum actinic PAR = 3000 μmol m-2 s-1, maximum PAR of saturation pulses = 6000 μmol m-2 s-1 adjustable at increments of 500 μmol m-2 s-1
Design
Randomized 70 μm glass fibers forming a single plastic-shielded bundle with stainless steel adapter ends
Dimensions
Active diameter 5.5 mm, outer diameter 8 mm, length 100 cm
Weight
180 g
Input

100 V to 240 V AC, 50 to 60 Hz

Output
12 V DC, 5.5 A
Operating temperature
-5 to +45 °C, (non-condensing)
Weight
350 g including cables
Design
Aluminum case with custom foam packing
Dimensions
50 cm x 34 cm x 20 cm (L x W x H)
Weight
3.8 kg
Program

WinControl-3 System Control and Data Acquisition Program (Microsoft Windows 10 and 11) for operation of measuring system via PC, data acquisition and analysis. Not compatible with Windows 10 on ARM

Saturation Pulse Analysis

Measured: Ft, F0, FM, F, F0’ (also calculated), FM’. Depending on the leaf clip connected, the software can record PAR, temperature and also humidity. [In the case of the MINI-PAM-II clip humidity can be measured, which the clip of the JUNIOR-PAM cannot.]
Calculated: F0’ (also measured), FV/FM and Y(II) (maximum and effective photochemical yield of PS II, respectively), qL, qP, qN, NPQ, Y(NPQ), Y(NO) and ETR (electron transport rate)

Fitting Routines

Two routines for determination of the cardinal points α, Ik and ETRmax of light curves

Programmed Features

Automatic determination of signal offset for all light intensities and gain levels. Automatic calibration of internal PAR sensor against an external PAR sensor connected to the instrument

Computer Requirements

Processor: 0.8 GHz, RAM: 512 MB, screen resolution: 1024 x 600 pixels, interface: USB 2.0/3.0

Communication Protocol

USB