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Quality Digest


NewTek LVDT Position Sensors for Accurate Seismic Surveys

Vibroseis trucks better equipped to tell what’s shaking

Published: Tuesday, April 12, 2022 - 11:59

(NewTek: Pennsauken, NJ) -- Seismic surveys are a noninvasive method used by exploration companies to search for oil and gas below the Earth’s surface. The testing is conducted with vibroseis trucks that deliver a low-frequency vibration from a seismic vibrator using a base plate that strikes the ground. With every sweep, outgoing vibration signals from the trucks strike the ground at varying speed and frequency. Returning signals help identify ground characteristics to create a profile that identifies areas of oil and gas deposits.

NewTek LVDT displacement sensors are deployed on the seismic vibrator trucks to provide feedback on the position of the base plate that strikes the ground to emit vibrations necessary to conduct seismic surveys. Knowing the position of the base plate is important to controlling the vibrations being sent into the earth and that can vary in frequency to detect various ground characteristics. Position feedback also verifies whether the base plate is in a deployed or storage position.

NewTek Economical Model R-812 Series LVDTs operate reliably on the vibroseis trucks. Designed without internal electronics, these AC-operated sensors don’t have the sensitive electronic components often affected by shock and vibration. The sensor operates in hostile environments, with remotely located electronics installed in benign areas.

Constructed with a rugged stainless-steel housing, these linear position sensors operate over wider temperature ranges, from –65°F to 275°F (–4°C to 135°C) and have a longer life expectancy than LVDTs with internal electronics. Sensors feature a coil assembly potted and mechanically swaged into a 0.812 in. (20.6 mm)-diameter housing with a separate moving core. Long life makes them ideal for installations in locations without easy access.

A 1/4 in. (6.35 mm)-diameter core allows for a radial clearance of 1/16 in. (1.58 mm) between the movable core and the bore of the coil assembly’s 0.812 in. (6.35mm)-diameter core, which provides a large core-to-bore radial clearance to accommodate installation misalignments.

For more information, contact Mike Marciante at 856-406-6877 or visit the NewTek website.

About NewTek Sensor Solutions

NewTek Sensor Solutions designs and manufactures standard, custom, and harsh-environment, LVDT-based linear position sensors for industries including power generation, factory automation, oil and gas exploration, aerospace/military, chemical processing, subsea oil drilling, and automotive testing. Incorporated in 2016, NewTek Sensors offers more than 200 years of cumulative LVDT design and manufacturing experience by its key staff in serving an OEM and end-user customer base.


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