High Temperature LVDT Position Sensor for Military/Defense Applications

The usual 150C maximum operating temperature won’t cut it in many military and defense applications. For those who need to make position measurements in ranges of ±0.05″ to ±10″ [±1.25 mm to ±250 mm] at operating temperatures up to 400°F (200°C), Macro Sensors HSTAR 750 Series Hermetically Sealed Position Sensors could provide the solution.

 In addition to their maximum operating temperature of 200C, the 3/4 inch (19 mm) diameter AC-operated LVDTs are environmentally sealed to IEC IP-68, so they can handle rugged application requirements.

 The design targets the harsh environments found in military and defense applications such as fuel / oil level monitoring, load leveling of artillery platforms and controlling flight surfaces of airplanes and rudder positions of aircraft carriers, tankers, ships as well as submarines.

For more information about Macro Sensors HSTAR 750 Series Hermetically Sealed Position Sensors, click here.

Position Sensors Ensure Accuracy of Down Hole Drilling Equipment

US-based manufacturer of LVDT Linear Position Sensors and Rotary Position Sensors and Transducers, Macro Sensors, is now serving the petroleum industry with LVDT-based linear position sensors that are used for position feedback control of down hole drilling equipment such as bore scopes that measure the ID of the drilled hole.

SQ 1250 Series Heavy Duty LVDT Position Sensors

The LVDT linear position sensors for down hole applications are custom built to survive high temperatures and high pressure.  Units are rated for pressures to 20,000 psi, in electrically non-conductive, chemically benign media, at continuous temperatures as high as 400 degrees F.  The high temperature ratings are achieved by using special construction materials for the linear position sensors that include special high melting point soldering. To accommodate high pressures, the sensor case is vented to equalize pressure inside and outside of the LVDT linear position sensor.

Offering a compact 3/8” diameter design, these AC-operated LVDT linear position sensors serve well as an integral part of devices with tight space restrictions. A lightweight low mass core also makes the small, contactless linear position sensors ideal for applications having high dynamic response requirements.   Units operate with any conventional differential input LVDT signal conditioners to provide position feedback back to operators at the surface.

For more information on LVDT linear position sensors built for down hole and other refinery applications, contact Macro Sensors at postionsensors@macrosensors.com.

Trans-Tek AC-AC LVDT

Trans-Tek has created a unique category of Linear Displacement Transducer (LVDT), originally developed for a manufacturer of tools for the down-hole oil drilling industry. The products are the result of a collaborative, creative process that produced several iterations for increasingly deeper pressures and higher temperatures. Two models evolved, based on the company’s Series 230. However, Trans-Tek can add the same features to any stroke AC-AC LVDT. Other applications outside of the oil industry include R&D testing and nearly anywhere extreme environments exist.

To accommodate such high pressure, the transducer housing is perforated to equalize pressure inside and outside the LVDT. Since the holes in the housing expose the coils inside, the fluid must be electrically non-conductive and chemically benign. Of course, many hydraulic oils meet this requirement. The high temperature ratings are achieved by using special internal materials.

These LVDT’s are rated for pressures to 35,000 psi, in electrically non-conductive, chemically benign media, at continuous temperatures as high as 450°F. Non-linearity is ±0.25% and temperature coefficient of sensitivity is ±0.01% per degree/F. A high sensitivity output offers infinite resolution in a variety of strokes. Trans-Tek high-temp/high-pressure LVDT’s are available in a choice of 3/8” or ¾” OD body style with signal conditioners for DC-DC or 4-20 mA operation.

Trans-Tek
www.transtekinc.biz

Linear Position Sensor Tutorial

Pennsauken, NJ – Macro Sensors offers an in-depth tutorial on Linear Variable Differential Transformers or LVDT linear position sensors on its web site.   The tutorial covers everything you want to know about LVDT Linear position sensors including construction, significant features, operation and industrial applications.  It even answers questions on where to use an LVDT linear position sensor and what types of electronics work best for specific applications.

Linear Sensor Tutorial Image

A tried and true technology, LVDTs can measure movements as small as a few millionths of an inch up to several inches as well as positions up to ±20 inches (±0.5 m).  Commendable features such as friction-free operation, infinite resolution and unlimited mechanical life make LVDT linear position sensors the preferred technology in a wide variety of applications such as industrial automation manufacturing, power generation, civil engineering as well as industrial and subsea environments.

Macro Sensors