GC-485 Series LVDT Position Sensor

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Caractéristiques principales

• RS-485 output
• ±0.1% of FR maximum (±0.05% typical) linearity
• 32 devices communicating over 2 wires
• MIN, MAX and TIR readings
• Velocity output
• Internal tare (zero) function
• Stroke ranges from ±0.125 to ±1 inch
• IEC IP68 rating to 1,000 PSI [70 bars]

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About the GC-485 Series LVDT Position Sensor

The GC-485 Series heavy-duty, spring loaded gage heads are self-contained, ultra precision, digital I/O devices for high performance measurements in environments containing moisture, dirt, and fluid contaminants. The GC-485 eliminates the need for expensive and error-prone analog to digital conversion by internally converting the analog LVDT signals into engineering units (imperial or metric). The result is a fully calibrated and traceable measurement device, ready for installation, and 100% field interchangeable.

Operating on 8.5 to 30V DC supply, the GC-485 provides an addressable RS-485 loop output (MODBus RTU and ASCII protocols) running at 119 kBd baud rate and capable of handling up to 32 devices communicating over two wires. MIN, MAX and TIR readings are sampled and stored internally at a maximum update rate of 600 samples per second, and are provided to the host on demand. A velocity output (inch or mm per second) is also available, while an internal tare (zero) function affords maximum measurement range flexibility.

These robust gage heads feature a removable black-chromed, hardened tool steel tip threaded (4-48UNF-2A) to the working end. Internal construction prevents the core and shaft from rotating as they move longitudinally. The welded electrical connector allows replacement of a damaged cable without sacrificing the sensor. The external ½-20 threads and the two supplied locknuts facilitate installation and adjustment.

Like in most of our LVDTs, the GC-485 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 vibration and shock.

The ruggedness, long life cycle, and very high reliability of the GC-485 provide a low cost of ownership over the life of the equipment onto which they are installed. The one-piece front end (barrel), machined from solid stainless steel bar, coupled with a bronze bushing, has far greater resistance to side loads compared to other designs; it reduces the risk of probe damage during installation or maintenance. The GC-485 design also require fewer parts and weld joints, thereby increasing overall structural integrity and reliability.

Applications of GC-485 Series

• Roller Gap Control
• In-process Wet Grinding
• High Density Gaging
• Hand Held Gages
• X-Y Positional Feedback
• Remote Monitoring
• Applications where wiring must be minimized

Options

• All-welded stainless steel construction
• MS type connector (MIL-C-5015)
• Hardened tool steel contact tip
• High side load resistance
• Programmable filtering
• Calibration certificate supplied with each unit
• Air extend/spring retract available (consult factory)

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