Portable Leaf State Analyzer LSA-2050 (Heinz Walz GmbH, Germany)

Brand: Heinz Walz GmbH
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Portable Leaf State Analyzer LSA-2050 (Heinz Walz GmbH, Germany)

Brand: Heinz Walz GmbH

Product Code: LS2050

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Specifications: (see all)

Measured / controlled parameters

Chlorophyll fluorescence (Fv/Fm), UV and visible screening, chlorophyll concentration, Nitrogen Balance Index (NBI), flavonoid absorbance (AFLAV), anthocyanin absorbance (AANTH), leaf temperature and angle, GPS geolocation.

Measurement / analysis range

Fv/Fm – 0 … 1.0; NBI – 0 … 15; AFLAV/AANTH – 0 … 2.5 a.u.; leaf temperature – –5 to +45 °C.

Measurement accuracy / precision

Fluorescence ± 0.5 %; light intensity ± 2 %; temperature ± 0.3 °C; NBI ± 0.1.

Analysis method / operating principle

Non-destructive optical analysis based on spectrofluorimetry and PAM modulation – measurement of light absorbance from 310 to 770 nm.

Analysis / measurement time

One complete measurement – approx. 1 second.

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The LSA-2050 Leaf State Analyzer by Heinz Walz GmbH (Germany) is a next-generation handheld optical instrument for in-field assessment of plant physiological status. It combines four diagnostic modes in a single measurement:
1️⃣ UV and visible radiation screening,
2️⃣ chlorophyll content measurement,
3️⃣ maximum quantum yield of photosystem II (FV/FM),
4️⃣ nitrogen balance index (NBI).

The LSA-2050 uses LEDs at 310, 365, 450, 530, 630, 715 and 770 nm to quantify radiation screening by flavonoids and anthocyanins, chlorophyll absorbance, and photochemical efficiency. Integrated GPS and orientation sensors record geolocation, leaf azimuth, and solar angle for accurate field mapping.

The device stores over 30 000 data sets in its 8 MB memory and exports fully formatted Excel reports via USB-C. The accompanying LSA Software automatically plots FV/FM, AFLAV, AANTH and NBI values for statistical analysis.

Compact and lightweight (26.5 × 7 × 3.5 cm, 240 g), the LSA-2050 is powered by four AAA rechargeable batteries or USB connection and operates from –5 to +45 °C. It is the perfect choice for research in plant physiology, crop monitoring and environmental studies.

Tags: Soil and plant analysis

Soil and plant analysis

Measured / controlled parameters

Measurement / analysis range

Fv/Fm – 0 … 1.0; NBI – 0 … 15; AFLAV/AANTH – 0 … 2.5 a.u.; leaf temperature – –5 to +45 °C.

Measurement accuracy / precision

Fluorescence ± 0.5 %; light intensity ± 2 %; temperature ± 0.3 °C; NBI ± 0.1.

Analysis method / operating principle

Non-destructive optical analysis based on spectrofluorimetry and PAM modulation – measurement of light absorbance from 310 to 770 nm.

Analysis / measurement time

One complete measurement – approx. 1 second.

Sample volume / sample volume range

Measurement area – 1 cm² (spot diameter ≈ 11 mm).

Applicable media

Plant leaves (herbs, shrubs, trees); usable in field, greenhouse or laboratory.

Sensor / electrode / probe / indicator type

Seven LED sources (310, 365, 450, 530, 630, 715 and 770 nm); photodiode detector and IR temperature sensor; GPS and accelerometer.

Number of channels / measurement points

Single optical channel, one measurement point.

Temperature compensation

Automatic via built-in IR sensor.

Number of calibration points / calibration method

Factory spectral calibration; auto-calibration with reference standard.

Housing / chamber / tip material

Reinforced PA12 polyamide housing (SLS 3D-printed), quartz optical window.

Design and features

Single-block ergonomic design; touch-trigger button; status indicator; built-in tilt and orientation sensors.

Lighting / climate control system

Multi-spectral LED system (7 wavelengths, 2 excitation + 1 detection channel).

Number of programmable cycles / automatic modes

5 built-in programs (Chlorophyll, Stress, NBI, AFLAV, AANTH) + manual mode.

Interfaces and outputs

USB-C for data transfer and charging.

Software / PC compatibility

LSA-Software (Windows); Excel and CSV export; auto plots of FV/FM, NBI, AFLAV, AANTH.

Memory / data storage functions

Internal 8 MB memory (≈ 30 000 records) + PC export.

Operating conditions

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

Power supply

4 AAA rechargeable batteries or via USB 5 V port.

Battery life

Up to 8 hours continuous operation or ≈ 1000 measurements per charge.

Dimensions

26.5 × 7 × 3.5 cm.

Weight

240 g.

Scope of supply

LSA-2050 analyzer, USB cable, 4 AAA batteries, protective case, LSA-Software, manual.

Certificates and compliance with standards

CE; ISO 9001; GLP and RoHS compliant.

Country of origin

Germany

Storage conditions

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

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