Custom Quartz Sleeves & Sheaths

Parameter	Factory Standard	Manufacturing Limit
ID	2–100 mm	Larger on request
OD	4–110 mm	Larger on request
Wall thickness	0.5–15 mm	Confirmed per order
Length	5–3,000 mm	Longer via tube-to-tube welding
Closed-end thickness	1–5 mm	Confirmed per order
Cut-to-length tolerance	±0.5 mm	—

Inquiry

Sleeves & Sheaths quartz glass product image 1

Quartz sleeves and protective sheaths for thermocouples, heating elements, and probes — closed at one end, sized to fit around what they're protecting.

ID, wall thickness, and closed-end thickness are quoted together — a sleeve's closed end is usually thicker than the side wall for durability, so specify both rather than assuming the end matches the wall spec.

Quartz Sleeves & Sheaths Factory Standard & Manufacturing Limit

Sleeves protect a probe, element, or sensor from direct contact with a process environment while quartz's chemical resistance and temperature tolerance do the protecting. ID is sized to the OD of whatever goes inside, plus enough clearance for insertion and removal — send the inserted component's OD, not just a target ID.

Open-End, Closed-End and Protective Tip Designs

Closed-end (one end sealed, dome or flat) is standard for probe protection; open-both-ends is used where the sleeve is more of a liner than a protective cap. Side holes, where needed for wiring or venting, are added by mechanical or diamond drilling. Ends are ground and fire-polished; before shipment we check ID/OD, length, wall thickness, closed-end thickness, concentricity, and end condition.

20–30 mmUV Sleeve OD Reference

300–1700 mmUV Sleeve Length Reference

±0.1 mmID Reference

OpenEnd Option

ClosedEnd Option

JGS2 / MilkyMaterial Options

Protective Clearance

ID, Wall and Closed-End Geometry Control the Protected Component

Controlled Feature	Reference Capability / Requirement
OD / ID / Length	All three dimensions stated from the lamp, sensor or heater envelope
UV Sleeve Reference	OD 20–30 mm and length 300–1700 mm common industry range
ID Tolerance	±0.1 mm quotation reference where insertion clearance is critical
Wall Thickness	Specified with span, handling and optical / thermal function
End	Open, flat closed or domed closed end
Closed-End Thickness	Dimensioned separately from the tube wall
Side Features	Holes, slots, flange or mounting collar by drawing
Material	JGS2 transparent or milky quartz according to transmission and heating function

Sleeve Selection

Start from the Protected Part and Mounting Interface

Application	Reference Geometry	Critical Inputs
UV lamp sleeve	OD 20–30 × L 300–1700 mm reference	Lamp OD, seals and transmission
Thermocouple sheath	ID and closed end by sensor	Insertion depth and tip shape
Heater cover	Tube or formed envelope	Hot zone, mounting and material
Custom protection tube	By drawing	Clearance, end and side features

Available Forms

Configurations Defined by the Process

Open-End SleeveProtective tube with finished open ends

Domed SheathClosed rounded end for sensor or heater protection

Flat-End SheathControlled closed-end thickness and face

Mounted SleeveCollar, flange or side feature integrated by drawing

Applications

Lamp, Sensor and Heater Protection

UV LampsTransparent sleeves matched to lamp and sealing hardware

ThermocouplesClosed-end sheaths around temperature sensors

Infrared HeatersTransparent or milky quartz protective envelopes

Process ProbesCustom side holes, collars and insertion depths

Need a sleeve matched to a lamp or sensor?Send protected-part OD, sleeve ID / OD / length, wall, end shape, insertion depth and mounting interface.

Open the Product Configurator

Engineering Data

Grade-Qualified Material Purity

Electric-fused / flame-fused quartz: SiO₂ ≥99.99%; synthetic JGS1-grade fused silica: ≥99.999%. Grade and lot certificate govern supplied material.

Engineering Data

Formed Stock versus Cold-Cut Dimensions

Formed stock and finished cut parts use different length tolerances. Continuously drawn transparent stock: ±1.0 mm at OD ≤50 mm / ±2.0 mm at OD >50 mm. Rotationally fused opaque stock: ±5.0 mm. Cold-cut finished parts: standard ±0.5 mm; precision ±0.1 mm only where agreed for the finished geometry.