The opaque or non-transparent gas measuring hood is one of the closed mobile systems in which the hood is only closed for a short time depending on the application and then installed at a new measuring location. It is used to determine the exchange capacities of gases between the soil (plants) and the atmosphere. The gases emitted during soil respiration or dark respiration are collected in the hood within the soil frame and extracted through the connection opening at the top of the hood.

The hoods are available as open path or closed path applications:

• The open path application is a non-recirculating system where a small amount of gas sample is taken through a connection port (out) with a gas analyzer.
• The closed path application is a recirculating system (loop) in which gas samples are taken via the connection opening (out) with a gas analyzer.

With these two methods, all gases generated under the hood can be measured in the gas analyzer (if designed for this). In the event that hoods are fitted quickly, the hoods can be equipped with a pressure equalization valve or pressure equalization hose. This reduces the overpressure when the hood is fitted quickly.

• 1 x gas measuring hood opaque with 1 x DC axial fan incl. connection cable, 2 x cable gland M12x1.5 and sealing tape glued to the flange
• 1 x base frame with C-clamps
• 1 x power bank
• 1 x powerbank holder