LVP-HT / Passive AC
Passive AC displacement transducer configurations with remote signal conditioning for hot valves, hydraulic test systems and harsh-environment development. Review temperature and pressure together.
LVP-HT / DEFINE THE INTEGRATION
The operating limit belongs to a complete assembly at stated conditions. Describe the hot zone, pressure boundary, media, cable transition and electronics location before selecting a requested temperature or pressure.
Supply hot-zone temperature versus time, dwell, cycles, ramp rate and cold-end conditions. State where temperatures are measured on the coil, cable transition and connector.
Requests to 220°C or 350°C are review targets; a headline peak temperature does not establish continuous duty.
Define operating/proof conditions, pressure direction, fluid, sealing surface, thread or flange, trapped volumes and the required leak-test method.
A 250 bar request is not a rating at every temperature, medium or mounting arrangement.
Locate the electronics outside its reviewed temperature exposure. Provide carrier, cable length, feedthrough, screen and the existing control-card requirements.
Passive AC construction alone does not establish qualification for steam, subsea, radiation, aviation or nuclear service.
Technical background for these interface distinctions. Manufacturer references do not establish LVP ratings.
Requests to 220°C, optional 350°C or 250 bar are configuration targets, not simultaneous certified ratings.
Steam-turbine valve development, hot materials tests, hydraulic pressure systems and aerospace actuator research.
Original model review: Macro Sensors HSTA / HSTAR; Honeywell / Kavlico; turbine feedback configurations. References identify review candidates; compatibility is not pre-approved.
Check the replacement process ↗REQUEST A DEFINED CONFIGURATION
These request references prefill your RFQ. They describe the configuration you want quoted; final model number, A/B dimensions, thread, performance and availability are confirmed on the quotation drawing.
| Request reference | Requested travel | Body / mechanics | Requested interface | Drawing & review |
|---|---|---|---|---|
| LVP-HT-REQ-2P5 ↗ | ±2.5 mm (5 mm total / 0.197 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
| LVP-HT-REQ-10 ↗ | ±10 mm (20 mm total / 0.787 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
| LVP-HT-REQ-25 ↗ | ±25 mm (50 mm total / 1.969 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
| LVP-HT-REQ-50 ↗ | ±50 mm (100 mm total / 3.937 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
| LVP-HT-REQ-100 ↗ | ±100 mm (200 mm total / 7.874 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
| LVP-HT-REQ-200 ↗ | ±200 mm (400 mm total / 15.748 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
| LVP-HT-REQ-300 ↗ | ±300 mm (600 mm total / 23.622 in) | 19.05 mm (3/4 in) Free unguided core | Passive AC-LVDT + matched conditioner | Temperature, pressure, material and mounting require joint review |
Provide maximum body length, core or rod length, datum-to-null distance, thread, connector clearance and permitted overtravel. Dimension letters differ between original manufacturers. Use the exact released drawing for an installation comparison.
Compare a source-linked original model ↗TAKE THE CONFIGURATION TO YOUR ENGINEERING TEAM
Download the family guide, requested configurations and editable RFQ fields. Fill in the PDF, save it in your reader and email the saved file to inquiry@lvdtsensor.com.
Preliminary selection worksheet. Configuration-specific dimensions, ratings, released CAD and measured reports follow review.
EXCITATION & CONNECTION TOPOLOGY
Use these circuit principles to identify the required sensor and conditioner. Cable colour, shield count and connector shell do not establish a pinout.
Two primary leads and two differential secondary leads. The secondary polarity is established by the internal winding connection.
Open circuit at full size ↗
Two primary leads and three secondary connections including the centre tap. A fifth conductor may serve another purpose on some original models.
Open circuit at full size ↗
The conditioner receives the primary pair and two independent secondary pairs. Follow its polarity and calculation-mode requirements; no universal external jumper is implied.
Open circuit at full size ↗P1/P2 and S1/S2 identify winding functions; they are not physical connector pin positions. Digital RS485 additionally requires supply, reference, polarity, termination and register-map confirmation. Orbit needs its own network interface.
Full connection guide and original-model pin example ↗MECHANICAL SELECTION
Separate the moving core from the coil body. External guidance must maintain clearance; the electromagnetic sensing element has no sliding electrical contact.
A guided assembly simplifies linkage. Review side load, rod alignment, bearings and usable travel before integrating.
A contact tip follows the measured surface. Review tip force, pre-travel, overtravel and contact wear.
Concept schematics. Non-contact induction does not make bearings, springs or contact tips wear-free.
OPERATING CONDITIONS TO SEND WITH THE RFQ
Illustrative requirement checklists for engineering review. Supply your actual operating conditions and acceptance limits.
Submit hot/cold valve travel, mounting expansion, vibration, cable routing and the control-card details. Define the operating and outage inspection conditions.
Supply medium, pressure profile, seal design, temperature and installation orientation. Define proof/leak-test requirements with the responsible assembly designer.
Provide the applicable qualification plan, environmental tests, redundancy and traceability requirements. This page supplies no flight, nuclear or protective-system approval.
AGREE THE METHOD BEFORE THE ORDER
Proposed review steps. The quotation and agreed test plan define the actual test points, conditions, tolerances and deliverables.
Record the configuration drawing, materials, seals, cable and agreed simultaneous thermal/pressure conditions. Confirm the method and responsible test organization before ordering.
Plan baseline displacement checks, the specified exposure sequence and post-exposure checks. Define zero shift, sensitivity change and acceptance limits in advance.
Use the agreed pressure/leak and electrical checks for the released assembly. A coil-only test or room-temperature pressure result cannot establish the whole duty profile.
These steps are a planning framework. No measured LVP data or completed qualification is represented.
REQUEST A CONFIGURATION REVIEW
LVP-HT · High-Temperature AC-LVDT Transducers
Choose the required configuration, then add the mounting envelope, environment and original model. Drawings, compatibility and commercial scope are confirmed with the quotation.
inquiry@lvdtsensor.com ↗Those are separate configuration targets until a simultaneous duty profile is reviewed. Medium, seals, materials, cable transitions and test method must be confirmed together.
A passive AC sensing assembly can be evaluated separately from its electronics. State the temperature at the actual conditioner and cable transition; neither component inherits the other’s rating.
No such qualification is implied. Provide the applicable programme, required evidence and responsible acceptance authority for a separate review.
No. The listed values define the selection request envelope. The quote and released drawing identify the exact range, body size, electrical interface and acceptance conditions.
Yes. Include your installation envelope and required file format in the RFQ. Configuration-specific documentation follows engineering review; an illustration on this page is not a release drawing.
Request a temperature-qualified metal or flange arrangement. Confirm material, thermal expansion and permitted clamping force from the configuration drawing; polymer accessory clamps are excluded from the high-temperature RFQ.
Provide the configuration, quantity and delivery destination. Engineering will confirm the quotation, available documentation and schedule for that request.
LVP-DC
±2.5 to ±500 mm
4–20 mA · 0–10 V · ±10 V · RS485
Explore configuration ↗
LVP-PRB
±0.5 to ±25 mm
AC · half-bridge · DC · digital variants
Explore configuration ↗
LVP-MIN
±0.5 to ±50 mm
4 / 5 / 6-wire AC · remote conditioning
Explore configuration ↗
LVP-AMP
1 / 2.5 / 5 / 10 kHz excitation requests
0–10 V · ±10 V · 4–20 mA · RS485
Explore configuration ↗