Alco, Castel, Danfoss-Secop, Honeywell and various other manufacturers. Articles of these manufacturers can be found in our online shop category refrigeration circuit sight glasses. These manufacturers have been known for many years to produce excellent quality sight glasses. Further information on the articles can be obtained by clicking on the corresponding product image. If you would like information about the manufacturer, click on the desired manufacturer logo. ##ausblenden## With us you can order sight glasses from the market leading manufacturers in the field of refrigeration components for a fair price. Many of the sight glasses are in stock and can be delivered as fast as possible.