Product category:
Probes and sensors
News Release from: Macro Sensors | Subject: Hermetically-Sealed LVDT Sensors
Edited by the Manufacturingtalk Editorial
Team on 05 January 2007
Hermetically sealed LVDTs feature 4-20
mA I/O
Macro Sensors offers hermetically sealed LVDTs providing 4-20 mA input/output for easy field integration with PLCs, digital indicators, host computer-based data processing, QC data collection systems.
Macro Sensors, offers a new family of rugged, hermetically sealed LVDTs that provide 4-20 mA input/output for easy field integration with PLCs, digital indicators, host computer-based data processing, and QC data collection systems Units can be configured for either loop powered two-wire or externally powered three-wire sourcing output to address different I/O requirements in various applications
This article was originally published on Manufacturingtalk on 16 Nov 2004 at 8.00am (UK)
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Radial sealed connector reduces installed length
Rugged, spring-loaded AC/DC-operated LVDTs are for dimensional or position measurement in harsh environments such as automotive factories, forges and foundries.
Signal conditioner supports half-bridge sensors
Macro Sensors has introduced a new single-channel DIN-rail mounted modular signal condition that supports LVDT, RVDT or half-bridge inductive sensors.
Offered in both hard-connected and spring-loaded versions, Macro Sensors' 4-20 mA current loop output LVDTs are hermetically sealed against dirt, water, steam, solvents, and other corrosive elements, that enables their installation in hostile environments while the loop wiring connects to remote indicators and/or controllers located in environments safe from hostile conditions.
These units offer precise output with a maximum linearity error of only "0.1% of full range output using a statistically best-fit straight line.
For mechanical position measurement where a hard connection can be made to the test piece, Macro Sensors offers the HSI 750 and HSIR 750 Series of free-core LVDTs that provide a 4-20mA current loop output.
Further reading
Signal conditioner supports LVDT, RVDT or VRT
Macro Sensors has introduced a new single-channel DIN-rail mounted modular signal condition that supports LVDT, RVDT or half-bridge inductive sensors.
Dual channel digital controllers are user-friendly
Two six-digit, dual channel controllers for applications involving LVDT-based displacement transducers or VR half-bridge gaging probes are economically priced.
Intelligent controllers, indicators ease set-up
Economically-priced and user-friendly digital controllers and indicators deliver precise measurement for automation applications using AC- and DC-LVDT inputs.
Available in full ranges from 0.10 inches (2.5 mm) to 20 inches (500 mm), these andfrac34;-inch (19mm) diameter LVDTs are available as either blind bore units (HSI 750 Series) terminated in a glass-sealed axial connector that prevents the core from passing completely through the coil assembly or in a through-bore design (HSIR 750 Series) with the connector mounted radially to facilitate easy access to either end of the LVDT's core for better mechanical support and core guidance, as well as easier cleanout in dusty or gritty environments.
The radial connector also allows a shorter installed length to the sensor compared to units of the same range with axial connectors.
For applications where a hard mechanical connection cannot be made between the sensor's moving core and the test piece, Macro Sensors offers the GHSI 750 and GHSIR 750 Series of spring-loaded LVDTs.
This style of sensor consists of a spring-loaded shaft connected to the core of the LVDT that runs in a precision sleeve bearing.
The probe shaft is extended by a spring exerting a nominal force of 6 to 20 ounces depending upon total range.
These sensors feature a measurement repeatability of 0.0001 inches (2.5 :m) or better.
Available in full ranges of 0.10 inches (2.5 mm) to 4 inches (100 mm), the GHSI 750 and GHSIR 750 Series are ideal for the use in machine tool controls, go/no-go inspection, and statistical quality control (SQC) systems or as part of a closed-loop control system.
For simplified mounting, both series have a 1/2-20 UNF-2A threaded front end 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 long range gaging applications.
Units are also available with a radial connector version(GHSIR) that allows a shorter installed length, and in air-extend/spring-retract versions for custom gaging systems used with transfer lines and automated test stands.
A mating connector plug is supplied with all HSI, HSIR, GHSI, and GHSIR 750 Series sensors.
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