Dresser, Inc.

Sensata Technologies Massachusetts, Inc.

Jonathan Fredric Cohen

Anatoly Podpaly

Harold Randall Smart

Lei Lu

Paul Talmage Tirrell

Christian V Pellon

Jagadish Gattu

Simon C Kwok

Jagdish Gattu

Gabriel Porto

A controller for a valve assembly that is configured to meet requirements for use in hazardous areas. These configurations may regulate flow of instrument air to a pneumatic actuator to operate a valve. The controller may comprise enclosures, including a first enclosure and a second enclosure, each having a peripheral wall forming an interior space, and circuitry comprising a barrier circuit disposed in the interior space of one of the enclosures that power limits digital signals that exits that enclosure. In one example, the peripheral wall of enclosures are configured to allow instrument air into the interior space of the first enclosure but to prevent instrument air from the interior space of the second enclosure.

Constructing valve positioners for hazardous areas

A thermistor device includes include supports, contacts and offset posts configured to assist the fracturing of failed thermistor 'pills' and to distribute the fragments of the fractured pills into compartment away from electrically conductive contacts in order to minimize arcing and overheating.

Method and apparatus for control of failed thermistor devices

Growing community of inventors

Sharon, MA, United States of America

Jonathan Fredric Cohen