Sensors & Transducers


Miniature LVDT position sensors operate in tight places

June 2002 Sensors & Transducers

ATI Systems is offering the CD 375 series of miniature LVDTs from Macro Sensors. They are well suited to linear position measurement in OEM and end-user applications with tight space restrictions. A compact 3/8" diameter design makes these AC-operated LVDTs suitable as an integral part of devices such as hydraulic actuators, servo valves, medical equipment and other small mechanisms. A low mass core also makes the small contactless position sensors suitable for applications having high dynamic response requirements such as industrial robots, ATMs, copy machines, plastic injection moulding machines and automatic inspection equipment.

Available in full-scale measurement ranges from 0,63 mm (0,025") to 50,0 mm (2,0"), Series LVDTs offer a 50% larger core-to-bore radial clearance (0,012") than similar sized competitive units. The units also feature excellent repeatability (error of <0,01% of FSO), high resolution and the highest sensitivity consistent with good linearity (maximum linearity error of 0,25% FRO).

Environmentally robust, the devices operate in temperature extremes of -55°C (-65°F) to +105°C (+220°F). Stainless steel housings and epoxy encapsulation protect units from environmentally hostile conditions. External sealing of the miniature position sensors meets IEC standard IP61.

Macro Sensors offers the devices with optional Teflon bore liners and metric threaded cores, or the company can design and produce custom units with higher ambient temperatures and different lead wire exit points and connectors. Units can also be vented for operation in pressurised fluids and constructed of materials resistant to mild nuclear radiation.

Interchangeable with most manufacturer units, the CD 375 Series LVDTs operate with any conventional differential input LVDT signal conditioners. Macro Sensors manufactures a full line of LVDT signal conditioners that ensure optimum performance from the devices.

Wim Annandale, ATI Systems

016 986 2267

[email protected]



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