Shimadzu Option Parts Radial Sensor Unit 1 for TMP-803 1503 Series Molecular Pumps

Shimadzu Option Parts Radial Sensor Unit 1 (1003) is an OEM radial position sensing assembly designed for original-parts repair and replacement on TMP-803 and 1503 series molecular pumps. This Radial Sensor 1 Assy Unit is manufactured to meet the vacuum, mechanical and signal integrity requirements of Shimadzu turbomolecular pumps and is intended as a direct replacement to restore rotor radial monitoring and protective interlocks.

Key features

• OEM-quality replacement assembly specifically for TMP-803 and 1503 series pumps, engineered to original tolerances and fit.
• Precision radial position sensing to support rotor guidance, imbalance detection and protection routines used by the pump controller.
• Vacuum-compatible materials and construction to minimize outgassing and ensure long-term stability inside high vacuum environments.
• Robust mechanical mount and connector arrangement for straightforward swap-in installation without modification to pump housings.
• Manufactured and tested to provide consistent electrical signal levels compatible with factory controllers and diagnostics.

Applicable models

• TMP-803 series molecular pumps
• TMP-1503 series molecular pumps

Typical use and benefits

• Restores radial sensing after collision, bearing damage, contamination or age-related drift.
• Reduces downtime by using a direct-fit original replacement rather than extensive machining or adaptation.
• Helps maintain pump reliability and protection logic so the controller can accurately detect abnormal rotor motion and respond appropriately.

Basic inspection before installation

• Verify part number and visual condition: no deformation, fractures, or foreign deposits on sensing surfaces.
• Check connectors and mating pins for cleanliness and straightness; confirm insulation and shielding are intact.
• If available, compare the old and new assemblies to confirm identical mounting orientation and connector types.

Installation overview (recommended procedure)

1. Power down the pump and controller, isolate from vacuum lines and remove stored energy per site procedures.
2. Remove the pump cover or access plate following manufacturer guidelines to expose the radial sensor location.
3. Document position and wiring of the existing sensor assembly. Photograph or label connectors if helpful.
4. Unfasten the old sensor assembly and carefully disconnect the electrical connector(s). Avoid touching sensing surfaces directly.
5. Install the replacement Radial Sensor 1 (1003) in the same orientation and torque fasteners to the specified values in the pump maintenance manual.
6. Reconnect wiring, restore covers, and perform an electrical continuity check and basic insulation test as appropriate.
7. Power up the system and run the pump controller’s built-in calibration and self-check routines to confirm correct operation.

Maintenance and recommended checks

• Inspect sensor surface and mounting every scheduled major maintenance interval, or immediately after a rotor contact event.
• Keep sensing area free from lubricants, heavy contamination, or metallic debris—use only vacuum-compatible cleaning methods.
• When replacing bearings or performing rotor work, always verify sensor gap and alignment per factory specifications before final assembly.

Troubleshooting — common symptoms and first actions

• Intermittent radial alarm or false trips: check connector seating, wiring continuity, and shielding; clean/eliminate conductive contamination.
• Permanent loss of radial signal: confirm power and controller input channels, then swap to a verified-good sensor assembly to isolate pump vs. controller fault.
• Physical damage or misalignment after rotor contact: do not run the pump. Inspect rotor, bearings and sensor assembly and replace damaged components.

Ordering, packaging and part identification

• Order using the OEM part designation (Radial Sensor 1 Assy Unit, part 1003) and confirm compatibility with TMP-803 / 1503 series before purchase.
• Units are supplied clean-room wrapped or in vacuum-safe packaging to protect sensing faces and connector pins during shipping.
• We recommend keeping a replacement sensor in stock for critical systems to minimize downtime.

Handling, storage and safety

• Handle the assembly by its mounting body; avoid touching sensing surfaces or connector pins to prevent contamination and mechanical damage.
• Store in a dry, dust-free environment away from strong magnetic fields and corrosive chemicals.
• Observe ESD precautions when handling electronics and connectors.

Compatibility confirmation and support

Before installation, cross-check your pump serial number and controller revision against maintenance records to confirm that this radial sensor assembly is the correct option part for your pump. For additional parts, service procedures and non-standard maintenance components, please see Shimadzu molecular pump non-standard maintenance parts. For guidance on related option components and repair kits, consult Shimadzu Option Parts Radial Sensor Unit. Replacement planning, recommended spares lists and service contacts are available at Molecular pump non-standard parts and service.

If you need a detailed installation procedure, torque values or controller calibration steps specific to your pump serial number, please contact your authorized Shimadzu service representative or the supplier to obtain the official maintenance manual and instructions.