Contact Instruments

Contact Instruments' Diaphragms and 1:1 Piston Isolators are built to protect your gauge or recorder from drilling mud and other contaminants by separating the medium being pumped by either a rubber cup or a piston with seals.

Built to the most exacting standards for the harshest environment to provide years of trouble-free service. Contact Instruments' Diaphragm protects are available with Rubber or viton cups while our 1:1 Piston Isolator has numerous seal material options. In today's market, where pressures are getting higher and higher, we have available both Rubber cup Diaphragm and 1:1 Piston Isolator models available in flanged models.

Product Features


  • Diaphragm Protector 2" 1502 Weco Hammer union
  • 1:1 Piston Isolator 2" 1502 Weco Hammer union
  • Diaphragm Protector Flanged Model, Various flange sizes available
  • 1:1 Piston Isolator Flanged Model, Various Flange sizes available