Manufacturers of Ex-proof Pressure switches, Pressure Difference switches, Vacuum switches & Temperature switches since 1977. An ISO 9001:2008 certified company. X-proof products are CE marked as well as ATEX and IECEx approved. Ranges available from 0.8 inches wc to 8700 psi. We also supply pressure switches with diaphragm seals in exotic materials like Monel, Hastelloy, Titanium and all SS construction.