DC-LVDTs provide pre-calibrated 4-20 mA output.
December 11, 2006 -
Offering 2-wire, loop-powered, 4-20 mA operation, GHSI 750 Series is available in ranges of +0.500 in. to ±2.00 in. with max linearity of ±0.5% of full range output. Sensors consist of spring-loaded shaft running in precision sleeve bearing and connected to core of LVDT. Probe shaft is fully extended by spring exerting nominal force of 6-20 oz. Transmitters operate with servo controllers and PLCs, loop-powered analog or digital indicators, and computer-based DAQ and processing systems.
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Original Press release
Macro Sensors
7300 US Route 130 North, Bldg. 22
Pennsauken, NJ, 08110 1334
USA
Spring-Loaded, DC-LVDTs Offer Loop-Powered 4-20 mA Output for PLCs, Processing Systems, Data Collection Systems
Pennsauken, NJ, November 30, 2006... Macro Sensors, (www.macrosensors.com), a sensor company specializing in the manufacture of LVDT-based linear sensors and gaging probes, introduces the GHSI 750 Series of spring-loaded, DC-operated LVDTs that offer a two-wire, loop powered 4 - 20 mA operation commonly used with current-operated process controllers and recorders. The built-in loop powered electronics result in a position sensor that offers a precalibrated 4-20 mA output.
Operating over a wide range of loop supply voltages and with loop resistances up to 800 ohms, the GHSI 750 Series Transmitters can operate with a broad variety of servo controllers and PLCs, loop-powered analog or digital indicators, and computer-based data acquisition and processing systems. These capabilities make the GHSI 750 Series ideal for use in machine tool inspection, go/no/go inspection, and statistical quality control info or as part of a closed-loop control system.
Sensors are also ideal for remote sensing applications in which AC power is not readily available to operate external signal conditioning. In addition, the sensor can be installed in a hazardous location while the wiring connected to power supplies, indicators and controllers in a safe environment.
Sensors consist of a spring-loaded shaft running in a precision sleeve bearing and connected to the core of an LVDT. The use of a precision-sleeve bearing results in measurement repeatability of 0.000025 inches (0.6 µm) or better. A spring-extended plunger is guided by precision sleeve bearings. The probe shaft is fully extended by a spring exerting a nominal force of 6 to 20 ounces depending upon total range. Macro Sensors supplies an AGD standard number 9 contact tip that is made from chrome plated hardened tool steel. It is fully interchangeable with other AGD contact tips.
Available in ranges of +0.500 inch (+12.5 mm) to ±2.00 inches (±50.0 mm), the maximum linearity error for a GHSI 750 Series sensor is ±0.5% of full range output using a statistically best-fit straight line derived by the least squares method.
For simplified mounting the GHSI 750 has a 1/2-20 UNF 2A thread on the front of the housing, permitting the user to install the LVDT in a mating threaded part or by using the two hex nuts furnished with the sensor. This results in a ready-to-use package for position measurements and longer range gaging applications.
About Macro Sensors
Macro Sensors' extensive line of LVDT-based linear and rotary sensors are used for linear position measurement and feedback in a variety of industrial applications including factory automation, motion control systems, metal fabricating, automotive assembly as well as power plants, gas/steam turbines. Incorporated in 1994, the Company offers more than 200 years of cumulative design and manufacturing experience by its key staff in serving its OEM and end-user international customer base. On June 1, 2005, Macro Sensors was acquired by AST, manufacturer of state-of-the-art Micro-Electro- Mechanical- Structures (MEMS) based pressure sensors, transducers, and transmitters. Common applications of AST sensor products are in industrial OEM, hydraulic systems, fuel cells, medical gases, HVAC/R, refrigeration, oil & gas exploration/production, and off-road vehicles. For more information on AST products and technology, visit the AST website at www.astsensors.com.
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