United Electric Introduces One Series Transmitters

Oct. 28, 2015
HART capable transmitters provide programmable switching functionality for industrial process monitoring applications.

United Electric Controls introduces HART capable transmitters that provide programmable switching functionality for industrial process monitoring applications. The One Series 1XTXSW transmitter line integrates HART 7 compatible 4-20 mA output and two solid-state programmable relays for monitoring temperature or pressure in safety, alarm and emergency shutdown applications. Workers can manage all their instrumentation assets – including switches – using a centralized asset management solution, according to the company. 

The smart transmitters also include United Electric’s “I am Working” (IAW) discrete diagnostic output for remote monitoring from a PLC or DCS. A large backlit display provides process values, set point programming and health and switch status notifications. The One Series 1XTXSW hybrid transmitter-switch effectively replaces a gauge, a switch and a transmitter requiring only one connection to the process, according to the company. This reportedly reduces costs and potential media leaks while increasing reliability.

The One Series has no moving parts, which provides a repeatable and adjustable deadband switch suited for applications with high cycle rates. Instrument response time is <100 milliseconds, according to the company. The One Series 1XTXSW transmitters are valuable in hazardous and harsh monitoring conditions that involve temperature extremes and high pressures that rapidly change, exhibiting pulsations, water hammer and thermal cycling and other wear inducing conditions. Integrating sensors and solid state relays in an explosion-proof transmitter enclosure protects them against environmental stress and the HART programming capability makes it easier to configure and maintain the sensor and the switch remotely, avoiding the need to open the enclosure in Division 1 areas.

The new One Series 1X line has worldwide hazardous location approvals for Class I, Divisions 1 & 2 (Zones 0, 1 & 2). The 1XTXSW line also provides Dual Seal Certification, meeting the requirements of ANSI/ISA 12.27.01 and NEC 501.17 for hazardous location hydrocarbon pressure monitoring. The Dual Seal option provides a secondary process seal, which prevents the migration of process media into the instrument enclosure and conduit system in the event that the sensor diaphragm (primary seal) is breached. The Dual Seal offers all 316L stainless steel construction for process compatibility. A threaded collection port articulates 360 degrees, making installation easy and providing primary seal rupture annunciation. The burst pressure rating of the secondary seal exceeds all One Series pressure sensors, preventing media migration and providing maximum safety.