SeniTec's ongoing advancements in valve position indicating technology and process controls deliver reliable and efficient solutions. SeniTec position indicators perform reliably in the most challenging applications, as they are manufactured with the highest quality standards at our facility in Duluth, Georgia. NEMA 3, 4, 4x, explosion proof models are available. The extraordinary toughness, superior chemical resistance and excellent strength combine to create a new generation of VPIDs.