Company History


Mr. Heinz Walz founded his company in Erlangen-Eltersdorf north of Nuremberg. At that time, the company’s main products were gas exchange systems. These systems were designed in cooperation with Prof. Dr. Werner Koch of the Forest Botanical Institute of Munich.


The company moved 20 km north to Effeltrich which is close to the city of Forchheim. By opting consequently for open gas exchange systems and differential CO2 measurements, the performance of photosynthesis analysis was continually improved.


Further advancement and miniaturization of gas exchange systems for field work in cooperation with professors O. L. Lange (University of Würzburg), E.-D. Schulze (University of Bayreuth) und A. E. Hall (University of California).


The state award of the government of the State of Bavaria was given to the Heinz Walz Company for excellent craftsmanship.


Harald Walz joins the company after finishing his study of electrical engineering. Introduction of an innovative mini-cuvette system which provides full temperature and humidity control.


Worldwide first serial production of a PAM chlorophyll fluorometer for measuring photosynthesis (PAM-101). The device arose from intensive collaboration with associate professor Dr. Ulrich Schreiber, University of Würzburg. The fluorometer excites fluorescence by short pulses of constant amplitudes and measures the resulting pulse-amplitude modulated (PAM) fluorescence.


Steffen Walz joins the company after graduation as an electrical engineer.


Formation of a “company with limited liability” (GmbH). The Professor-Adalbert-Seifriz award for outstanding teamwork between craftsmanship and science was given to Mr. Heinz Walz and Prof. O. L. Lange.


Start of serial production of the first portable PAM fluorometer, the PAM-2000.


Fabrication of an outstandingly compact PAM fluorometer (MINI-PAM).


Introduction of the DIVING-PAM, the first underwater PAM fluorometer.


Development of two highly sensitive PAM fluorometers for analyzing algae in natural water samples (PHYTO-PAM und WATER-PAM). At this point, Walz provided a range of PAM fluorometers which was suited to measure photosynthesis outdoors above-ground or underwater under arctic to tropical conditions.


Start of production of the first imaging PAM fluorometer (IMAGING-PAM). This device is suited to detect subtle variations of photosynthesis within a sample but it can also carry out high throughput screening.


Introduction and market launch of the newly designed portable gas exchange system GFS-3000.


First employment of the MONITORING-PAM fluorometer in plant production.


Start of fabrication of the DUAL-PAM-100 system which is capable to measure simultaneously photosystem II (via PAM fluorescence) and photosystem I (via P700 absorption changes).


Launch of the ultra fast PAM-2500 fluorometer. Worldwide first commercialization of a system which measures concomitantly CO2 assimilation by gas exchange technique and activities of photosystems I and II.


Significant extension of the Walz product range in the field of light measurement.


Serial production of a PAM fluorometer providing several measuring and actinic light colors (MULTI-COLOR-PAM).


The Bavarian Exports Award was conferred to the Heinz Walz GmbH.


Serial production of MINI-PAM-II commenced.


Introduction of multi-color light panel (RGBW-L084) and bypass humidity control (CNF-400B) for the Gas-Exchange Chamber 3010-GWK1.


Walz enters the field of three dimensional phenotyping by introducing the 3D Version of the IMAGING-PAM. Start of PHYTO-PAM-II serial production.


With the DIVING-PAM-II, the first PAM system comprising a spectrometer is introduced to the market.


With the start of the serial production of the DUAL-KLAS-NIR Photosystem I can now be studied in vivo in unprecedented detail on the basis of the P700, PC and Fd signals.


The launch of the MICRO-PAM system significantly expands the possibilities already provided by the MONITORING-PAM.