ASTM Pear-Shaped Oil Test Tube for OLEUM (Each)

The Z600-OL-PT is the ASTM pear-shaped oil test tube for the Hermle OLEUM Oil-Test Centrifuge (Z600-OL chassis), sold as each. The ASTM pear-shaped tube is an alternative ASTM-conformant tube format to the Z600-OL-CT conical tube. The pear-shaped geometry (a wider mid-section tapering to a narrow tip) concentrates separated water and sediment phases differently from the conical-tip geometry. The pear shape provides finer volumetric resolution for trace-sediment analysis at very low sediment volumes (sub-millilitre measurements that the conical tube's geometry doesn't resolve as precisely). Used with the Z600-OL-PTC felt-cushion adapter to seat the tube correctly in the Z600-OL-BUK round bucket.

Key Specifications

Conical vs Pear-Shaped: Tube Geometry Selection

The OLEUM workflow supports two ASTM tube geometries for different sediment-volume measurement requirements:

The pear-shaped tube's narrow tip provides higher volumetric resolution for trace-sediment analysis, useful for high-quality lubricating oils where sediment contamination should be very low. The conical tube is the workhorse format for general ASTM oil-testing where standard sediment volumes are expected.

Some labs stock both formats; the protocol specifies which tube geometry to use for each ASTM analysis.

Compatibility & When to Order This SKU

Tube pairing: OLEUM Oil-Test Centrifuge workflow only. Order this SKU when:

1. Initial pear-shaped workflow setup. When commissioning an OLEUM for ASTM workflows requiring pear-shaped tube geometry, order tubes per the workflow's batch size (typically 4 tubes per cycle for full 4-bucket loading).
2. Workflow-recurring replenishment. ASTM oil test tubes see workflow-recurring use (one tube per sample, typically discarded after analysis or after a finite number of cleaning cycles per ASTM protocol).
3. High-quality lubricating-oil testing. Labs running ASTM D2273 trace-sediment analysis on premium lubricating oils where the pear-shaped tube's higher volumetric resolution matters.
4. Mixed conical / pear-shaped workflow. When the lab runs both tube formats per protocol requirements, stock both per workflow.
5. Replacement. If a tube is broken or has reached service life.

Application Profile

ASTM D2273 trace-sediment analysis on premium lubricating oils: automotive premium-oil quality testing, marine premium-oil testing, industrial-machinery premium-oil testing where trace-sediment quantification matters.

Refinery quality-control on premium fuel products. Petroleum-quality testing on premium fuel grades where trace-sediment limits are tight.

Lubricating-oil manufacturer quality-assurance. Lubricating-oil manufacturer QC labs running pear-shaped-tube ASTM analysis on outgoing-product samples.

Educational and training petroleum-engineering programs. Petroleum-engineering curricula teaching ASTM oil-testing methodology that includes both conical and pear-shaped tube geometries.

Mixed-format oil-testing labs. Labs that handle ASTM workflows requiring either conical or pear-shaped tube geometry depending on the specific analysis protocol.

Ordering & Configuration

Use with Z600-OL-PTC felt-cushion adapter: the pear-shaped tube is seated in the Z600-OL-PTC felt-cushion adapter inside the Z600-OL-BUK round bucket. The adapter cushions the glass tube during centrifugation and ensures correct tube positioning for protocol-compliant analysis.

Symmetric loading. The OLEUM rotor's 4-bucket swing-out configuration requires 4 ASTM pear-shaped tubes per cycle (one per bucket); pre-balance pairs by sample mass before each spin.

Tube cap / stopper confirmation. ASTM pear-shaped tubes are typically capped per ASTM protocol before centrifugation; confirm cap integrity before each spin.

Z600-OL-PT ships as each. Buy per workflow batch size, typically 4 tubes minimum per cycle for full 4-bucket loading, with replenishment quantity sized to workflow throughput and tube lifetime per ASTM protocol.

Confirm at quote: chassis pairing (Z600-OL OLEUM in inventory), workflow protocol (ASTM analysis specifying pear-shaped tube geometry), tube quantity needed for workflow throughput, adapter pairing (Z600-OL-PTC felt-cushion adapter availability), and lead time.

Warranty: Per Hermle's terms for ASTM oil-test tube glass. Confirm at quote. Glass tubes are typically not under the standard 5-year drivetrain warranty (which covers chassis and rotor mechanical components) but follow Hermle's separate consumable-glass terms.

OLEUM Oil-Test Centrifuge tube and adapter family (Z600-OL chassis):

- Z600-OL-PT (this product): ASTM pear-shaped oil test tube (each)

- Z600-OL-PTC: Felt-cushion adapter for ASTM pear-shaped oil test tube

- Z600-OL-CT: ASTM conical oil test tube (each)

- Z600-OL-CTC: Felt-cushion adapter for ASTM conical oil test tube

- Z600-OL-BUK: Round bucket for OLEUM rotor

- Z600-OL-INS: Bottom insert for round bucket

- Z600-OL-COM: Complete OLEUM bundle

Pick the pear-shaped tube (Z600-OL-PT + Z600-OL-PTC adapter) for ASTM workflows specifying pear-shaped geometry (typically D2273 trace-sediment); pick the conical tube (Z600-OL-CT + Z600-OL-CTC adapter) for standard ASTM D96 / D4007 / D2273 conical-format workflows.