MINI-PAM-II Porometer

Brand: Heinz Walz GmbH
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Brand: Heinz Walz GmbH

Product Code: MPAM-2

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Specifications: (see all)

Measured / controlled parameters

Stomatal conductance (gs), total water vapor conductance (gt), transpiration rate (E), vapor pressure deficit (VPD), leaf temperature, pressure, humidity, PAR light intensity, CO₂ concentration, GPS and orientation data.

Measurement / analysis range

Conductance: 0–9999 mmol·m⁻²·s⁻¹; PAR: 0–7000 µmol·m⁻²·s⁻¹; temperature: –5…+45 °C; pressure: 300–1100 hPa; humidity: 0–100 %.

Measurement accuracy / precision

RH sensor ±1 % RH (20–70 %); leaf temperature ±0.3 °C; pressure ±1 hPa; CO₂ ±(30 ppm + 3 %).

Analysis method / operating principle

Open-system porometry with a constant airflow; measures humidity and temperature differences before and after air passes the leaf.

Analysis / measurement time

Single measurement ≈ 2 s; series measurements via predefined protocols.

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The MINI-PAM-II Porometer is an advanced leaf-clip system combining stomatal conductance and chlorophyll a fluorescence measurements to evaluate photosynthetic performance (PSII). Its lightweight and robust design allows high-precision operation in the field, greenhouse, or laboratory.

The instrument integrates multiple sensors — for humidity, pressure, leaf temperature (infrared), CO₂ concentration, flow rate, and GPS positioning. It includes a micro-quantum PAR sensor and a fiber-optic system for precise chlorophyll fluorescence detection. The porometer quantifies water vapor conductance, transpiration rate, vapor pressure deficit (VPD), and geospatial orientation (sun incidence angle, latitude, longitude, and altitude).

Data can be viewed directly via the touchscreen or processed through WinControl-3 software. The device offers automatic stability detection, programmable light control, and compatibility with external LED light sources for actinic illumination. Powered by 6 AA rechargeable batteries, it provides up to 8 hours of continuous operation.

The MINI-PAM-II Porometer is an indispensable research tool for plant ecophysiology, enabling accurate, non-destructive analysis of gas exchange and photosynthetic responses under various environmental conditions.

Tags: Soil and plant analysis

Soil and plant analysis

Measured / controlled parameters

Measurement / analysis range

Conductance: 0–9999 mmol·m⁻²·s⁻¹; PAR: 0–7000 µmol·m⁻²·s⁻¹; temperature: –5…+45 °C; pressure: 300–1100 hPa; humidity: 0–100 %.

Measurement accuracy / precision

RH sensor ±1 % RH (20–70 %); leaf temperature ±0.3 °C; pressure ±1 hPa; CO₂ ±(30 ppm + 3 %).

Analysis method / operating principle

Open-system porometry with a constant airflow; measures humidity and temperature differences before and after air passes the leaf.

Analysis / measurement time

Single measurement ≈ 2 s; series measurements via predefined protocols.

Sample volume / sample volume range

Sample area 0.79 cm² (1 cm diameter).

Applicable media

Plant leaf samples – herbaceous, woody or coniferous; for field, greenhouse and laboratory studies.

Sensor / electrode / probe / indicator type

IR leaf temperature sensor, humidity and pressure sensors, LS-B PAR micro-quantum sensor, CO₂ sensor, GPS module with accelerometer and gyroscope.

Number of channels / measurement points

Single multi-parameter measuring point.

Temperature compensation

Automatic built-in compensation for temperature and humidity sensors.

Number of calibration points / calibration method

Calibration of pressure, CO₂, light flux and humidity sensor matching (Match).

Housing / chamber / tip material

Aluminum housing, silicone gaskets (white and black).

Design and features

Compact portable leaf-clip design, adjustable clamp pressure, tripod mount, dark shield, fiber-optic port at 60°.

Lighting / climate control system

Built-in PAR sensor, compatible with external LED Light Source 2054-L (RGBW).

Number of programmable cycles / automatic modes

Supports Actinic + Yield, Light-Curve, Induction-Curve and Clock protocols.

Interfaces and outputs

LEAF CLIP and SYNC ports, PC connection via USB or RS-232.

Software / PC compatibility

WinControl-3 (Heinz Walz) software with online graphs and parameter control.

Memory / data storage functions

Internal MINI-PAM-II memory for numeric and graphical data.

Operating conditions

–5 to +45 °C; humidity up to 90 % (non-condensing); pressure 300–1100 hPa.

Power supply

6 × AA 1.2 V / 2 Ah rechargeable batteries (via MINI-PAM-II unit).

Battery life

Up to 8 hours continuous; ≈ 1000 measurements without porometer mode.

Dimensions

24 × 7.5 × 14 cm.

Weight

450 g (excluding cable).

Scope of supply

MINI-PAM-II porometer, PORO/AL cable, PORO/B buffer, gaskets, dark shield, tripod mount, filters, PORO/POR standard, PORO/T case, manual.

Certificates and compliance with standards

CE, ILAC-MRA, complies with international GLP standards.

Country of origin

Germany

Storage conditions

Store dry at +5…+40 °C, avoid dust and moisture.

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