Orange research 1203pgs#64817 differential pressure gauges ABB Speed Input Module What is the Guardmaster ATLAS

What is the Guardmaster ATLAS 4 safety interlock switch used for

World Trust: Manufactured by Mitsubishi Hitachi Power Systems

Ue        230  400 500-690 V~

20x4470a6sr

ambient temp 55⁰c

Orange research 1203pgs#64817 differential pressure gauges ABB Speed Input Module What is the Guardmaster ATLASOrange research 1203pgs#64817 differential pressure gauges orange research, inc. model: 1203pgs#64817 desc.: 1203pgs 1a 2. 5b a a switch type: a electrical rating: 0. 7a, 125vac max working pressure: 5000 psi temp. rating: t6 csa file: 152872 class 1, div. 2 groups a, b, c, & d class ii, div. 2 groups f & g csa enclosure type 4x d214 0 to 2 kg cm2 differential made in usa weight: 640 gm