GCA-121-050;中文规格书,Datasheet资料.pdfVIP

GCA Series – AC Operated Gage Heads GCA Series Gage Heads Rev 4 2012-august 1/4 ? Hermetically sealed housing ? 25 μ-inch [0.6 μm] repeatability ? IEC IP68 rating to 1,000 PSI [70 bars] ? Long strokes up to ±2 inches ? Hardened tool steel contact tip ? High side load resistance ? Long cycle life ? High temperature DESCRIPTION The GCA Series heavy-duty gage heads enable high performance in environments containing moisture, dirt, and fluid contaminants. Gage heads are spring loaded LVDTs (Linear Variable Differential Transformers) with precision linear bearings. These robust high-temperature gage heads allow measurements over long strokes up to ±2 inches [±50.8mm]. The spring force is typically 9oz [255 grams] at fully compressed electrical stroke. A removable black-chromed, hardened tool steel tip is threaded (4-48UNF-2A) to the working end. Internal construction prevents the core and shaft from rotating as they move longitudinally. The integral electrical connector (welded) provides for easy installation and allows replacing a damaged cable without sacrificing the sensor. Installation and adjustment are facilitated by an external ?-20 mounting thread and the two locknuts supplied with each unit. Like in most of our LVDTs, the GCA windings are vacuum impregnated with a specially formulated, high temperature, flexible resin, and the coil assembly is potted inside its housing with a two-component epoxy. This provides excellent protection against hostile environments such as high humidity, vibration and shock. The ruggedness, long life cycle, and very high reliability of the GCA Series provide the lowest cost of ownership over the life of the equipment onto which they are installed. The one-piece front end (barrel which contains the bearing assembly), machined from solid stainless steel bar, coupled with a bronze bushing, has far greater resistance to bending forces and side loads compared to other designs. This is parti