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Visual control

Panorama inspection windows for fermenters, secondary fermentation and final storage tanks allow for a significantly better optical control of the fermentation and homogenization process in closed tanks.

The enlarged field of vision facilitates an optimal spatial assessment of the conditions within the tank.

PAULMICHL inspection windows set new standards in monitoring and above all in optimizing the efficiency of agitators through adjustment measures under perfect optical control.

The use of high-quality materials which are resistant to chemical attack makes the individual components highly durable. By means of the easily accessible sealing unit from the PAULMICHL inspection window PSG 300 – 400, a simple control of leak tightness is possible at all times from outside the tank.

The glass pane is made of soda-lime glass in accordance with DIN 8902, with wipers. The factory installation of a washing nozzle made of V4A piping with gas non-return valves and a DVGW approved ball valve facilitate easy cleaning of components inside the tank.

In order to achieve a high degree of serviceability the Paulmichl Inspection Windows feature a separate internal fixing system for the glass elements in the mounting frame. The special glass as well as the V4A stainless steel frame has a compressive strength of up to 1 bar. Various designs of Paulmichl Inspection Windows allows universal installation in already created wall openings. Installation in subsequently created core drill holes is also possible without any problems. The use of adjustable lighting elements allows a glare-free view into the illuminated tank interior. The installation of an additional sight glass is therefore not necessary.


The efficient, outdoor heating system

With our external heat exchanger you get a reliable, effective heating system for your biogas plant - all year round!

The BioHeat heating system has been adapted to the special requirements of profitable biogas plants and ensures safe and fast heating of the fermenter.

The ideal solution for an economical, high-performance biogas plant! The BioHeat heat exchangers are designed in such a way that they can be easily installed on any biogas plant. The area of application extends beyond fermenter heating and the preliminary stage to hygianization. A BioHeat is also a reliable component for the use of biowaste in biogas plants. The substrate can already be fed in at a temperature of 70°C, which eliminates the need for time-consuming heating. There is no need for time-consuming heating. The BioHeat heating system is available with two to 24 modules. The pipe length can be adapted to suit your needs on request. Save yourself the costly and time-consuming fermenter cleaning and prevent a possible breakdown!

Benefit from our experience.

As a long-standing supplier of technology for biogas plants, we know exactly which properties, materials and designs are important for efficient fermenter heating. Based on this experience, we have designed our BioHeat. This heating system is installed in our plant and supplies the plant reliably and constantly with heat.

TÜV certified

FRITZ PAULMICHL GmbH is a specialist company certified by TÜV Süd (German Technical Inspection Agency) in accordance with the WHG for plants for the production and treatment of liquids hazardous to water.

Convince yourself!

We would be happy to welcome you to one of our reference systems and advise you on the technical details and use. Take the opportunity and convince yourself of BioHeat on site!


TÜV- certified specialized company

As a TÜV-certified specialized company in accordance with §19 WHG, PAULMICHL pipeline construction is characterized by reliable and professional on-site installation by our specially qualified team.


Our range extends from filling and discharge lines to flushing and pump lines. Necessary individual special designs are also not a problem. Another advantage of PAULMICHL pipeline construction is that planning, delivery and installation are all carried out from a single provider.

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