Pressure gauges from the 111.22 series are designed to be used in industrial heating installations. They are adapted to measure pressure of media whose temperature may reach even 200°C, their measuring ranges span from 0..1bar to 0…600bar. The measurement is carried out using a Bourdon spring (up to 60bar) or a coil spring (in other cases). The products are manufactured in accordance with the EN 837-1:2000 and PN 88/M-42304 standards. The 1.6 accuracy classguarantees high precision of measurements. The latter depends on thermal factors and changes according to the following principle: tolerance increases by 0.3% of the measuring range for every 10K of deviation from 20°C. Pressure gauges of this series can be used with gases and liquids that are chemically inert to copper alloys. They are available in diameters of 100mm and 160mm.