Laboratory Equipment
Low-permeability 316L lift support for instrument lids, analyzer covers, and adjustable sections that sit beside sensitive sensors, balances, and measurement systems.
- 1 The Cover That Sits Next to a Reading You Can’t Disturb
- 2 Four Lab Applications Where the Material Matters
- 3 Single Spring or Paired on Lab Equipment
- 4 Material Choice and When to Add a Locking Function
- 5 Specifying Non-Magnetic Gas Springs for Laboratory Equipment
- 6 Why Mounting Angle Decides the Usable Force
- 7 Why Lab OEMs Source Non-Magnetic Gas Springs for Laboratory Equipment from Newtone
- 8 Frequently Asked Questions
- 9 Conclusion
- 10 Get a Specification or Quote
The Cover That Sits Next to a Reading You Can’t Disturb
Non-magnetic gas springs for laboratory equipment solve a quiet problem: an instrument lid has to lift and hold open a few centimetres from a sensor that resents any magnetic mass nearby. A standard gas spring would do the lifting fine, but its carbon-steel rod and body sit close enough to a magnetometer, a precision balance, or an analytical detector to bias the reading or nudge a calibration. The motion is trivial. The constraint is that the part supporting it must stay nearly invisible to the instrument beside it.
This page is for OEM engineers building analytical, metrology, and laboratory instruments, and for procurement teams sourcing compatible motion hardware for sensitive benches. The materials science is covered in full on our non-magnetic gas springs overview; here the focus is the lab case — compact envelopes, light panels, and measurements that punish interference. Newtone manufactures in Turkey and exports to more than 60 countries, building these to order.
Short answer: a non-magnetic gas spring for laboratory equipment is built around 316L for low magnetic permeability, with every part — rod, fittings, bracket — reviewed as a unit. Because lab panels are light but their enclosures are tight, the mounting geometry usually matters as much as the force rating.
Four Lab Applications Where the Material Matters
The need shows up wherever a moving panel shares a bench with a measurement. Each case has light loads but a different reason the spring’s material and geometry are scrutinised.
Analytical Instrument Lids
Hinged covers on spectrometers, chromatographs, and detectors that open for sample access. Light panels cycled often, close to the optics or sensor, so a low-permeability build and a clean hold-open both matter.
Balance & Magnetometer Enclosures
Flaps and draft shields around precision balances and magnetic measurement rigs. This is where non-magnetic is least negotiable — a ferromagnetic spring nearby can shift the very quantity being measured.
Sample Chamber & Access Doors
Doors on environmental chambers, incubators, and sample handlers. Reliability over many cycles and compatibility with cleaning agents drive the spec, alongside the non-magnetic requirement near sensors.
Metrology & Positioning Covers
Covers and adjustable sections on measurement and positioning systems where any magnetic influence undermines accuracy. The spring supports stability, not just movement, and must respect the instrument’s tolerance.
Single Spring or Paired on Lab Equipment
Lab panels are light, so a single spring usually suffices. Pairing is about keeping a wider lid even and twist-free — and where you pair, both springs must be non-magnetic and force-matched so one side doesn’t lead the other.
⬤ Single Spring Setup
- Light lid under ~6 kg (13 lb)
- Narrow, centered instrument cover
- Centered hinge, no lateral pull
- Most analytical and chamber lids
- Fewer parts to qualify as non-magnetic
⬤ Paired Spring Setup
- Wider draft shields or chamber doors
- Even motion needed across the panel
- Load above ~6 kg (13 lb) or offset hinge
- Both springs 316L and non-magnetic
- Springs force-matched to ±5%, same batch
Material Choice and When to Add a Locking Function
The defining feature is the material set, built around austenitic 316L for low magnetic permeability and the corrosion resistance lab cleaning demands. Two further questions settle the spec.
316L and Reviewing the Whole Assembly
Austenitic 316L is the baseline: low permeability, strong corrosion resistance, and tolerant of the solvents and disinfectants common on a lab bench. It shares the family of our stainless steel gas springs, but a sensor-adjacent application needs the rod, piston, and fittings reviewed for permeability too — not just the shell. Where corrosion resistance is the goal but magnetic behaviour is not a concern, a standard stainless build may be enough; assess the two separately. For documentation to support your own qualification, see our certificates.
Locking Sections That Must Stay Put
Where a lid or cover must hold open hands-free during sample work, a locking gas spring adds a mechanical hold — built non-magnetic to match. An end-lock holds at full extension for hold-open; a lock-anywhere unit holds at any point for set positioning. The release method depends on the instrument and the operator’s reach, so confirm the locking type and the non-magnetic build together before the design freezes.
Specifying Non-Magnetic Gas Springs for Laboratory Equipment
| Property | Specification |
|---|---|
| Body & rod material | Austenitic stainless steel (316L), low magnetic permeability |
| End fittings | Non-magnetic eyelet, ball joint, or fork — reviewed as part of the assembly |
| Force range | 50–2000 N (11–450 lbf); lab typical 50–300 N (11–67 lbf) |
| Force tolerance | ±5% (tighter than ±10–15% commodity supply) |
| Stroke | Made to order, typically 40–400 mm (1.6–16 in) |
| Mounting geometry | Specify for near-perpendicular action at mid-stroke in tight enclosures |
| Seals | HNBR (UV and ozone resistant) as standard |
| Sensitivity review | Whole assembly — confirm against the instrument’s tolerance |
Why Mounting Angle Decides the Usable Force
In a tight lab enclosure the rated force is rarely the limiting factor — the mounting angle is. A gas spring only delivers its full force to the panel when it acts perpendicular to the lever. At any other angle, only the perpendicular component does useful work, and that component is set by the geometry, not the datasheet number.
- r — effective (perpendicular) moment arm, mm (in)
- d — distance from hinge to the spring mount, mm (in)
- ψ — angle between the spring’s line of action and the lever
- F — rated spring force; Fuseful — force actually lifting the panel
Worked example. Suppose an instrument lid mounts a 200 N (45 lbf) spring at a distance d = 120 mm (4.7 in) from the hinge. If the cramped enclosure forces the spring to act at ψ = 30° to the lever, the effective moment arm is r = 120 × sin 30° = 120 × 0.5 = 60 mm (2.4 in), and the useful force is Fuseful = 200 × 0.5 = 100 N (22 lbf) — half the rating is simply lost to the angle. Open the geometry so the spring acts at ψ = 75° and sin 75° ≈ 0.97, recovering r = 116 mm (4.6 in) and Fuseful ≈ 193 N (43 lbf) from the same spring. The lesson for lab enclosures is blunt: fix the geometry before you reach for a bigger force. Share your envelope and we will size both the gas spring and the mounting bracket for the best usable angle.
The mounting rules follow from there. Fit the spring with the rod pointing down when the lid is closed so oil keeps the seals lubricated and the close stays quiet. Keep both pivots in the same plane of motion — gas springs take axial load only, and a side-loaded rod in a precision instrument wears unevenly and starts to feel notchy. And confirm every fitting and bracket is non-ferromagnetic; the broader material logic is on our non-magnetic gas springs overview.
Why Lab OEMs Source Non-Magnetic Gas Springs for Laboratory Equipment from Newtone
We manufacture in our own facility in Turkey, so material sourcing, tolerances, and lead times stay under our control — exactly what a sensitive, low-volume, custom application needs.
Frequently Asked Questions
Many analytical instruments hold a sensor, balance, or magnetometer close to a moving panel, and a standard carbon-steel gas spring brings a ferromagnetic mass into that space. Near a sensitive measurement, even a small magnetic part can bias a reading or drift a calibration. A non-magnetic gas spring built from austenitic 316L has very low magnetic permeability, so it supports the lid or cover without interfering with the instrument beside it.
Lab lids, flaps, and instrument covers are light, so force per spring typically falls between 50 N and 300 N (11–67 lbf). The harder part is geometry: lab enclosures are compact, so the spring often mounts at an awkward angle that wastes part of its force. The effective moment arm, not just the rated force, decides whether the panel holds open. Share the panel weight and the available mounting space and Newtone will size it.
316L is the right baseline because of its low magnetic permeability and corrosion resistance, but the whole assembly must be reviewed, not just the body. End fittings, the rod, and internal parts can each introduce a ferromagnetic element. For instruments near magnetometers or precision balances, specify every component as non-magnetic and confirm the build against the sensitivity of the measurement, since 316L is low-permeability rather than zero.
Mount the spring with the rod pointing down in the closed position so oil keeps the seals lubricated and the motion stays smooth. In a compact lab enclosure, aim for the spring to act close to perpendicular to the panel at mid-stroke, where its moment arm is largest, otherwise much of the force is wasted. Keep both pivots in the same plane of motion to avoid side load, and confirm the fittings and bracket are also non-magnetic.
Usually yes. Lab and analytical instruments rarely match standard catalog dimensions, so force, stroke, rod diameter, and end fittings are specified per project. Newtone manufactures across 50–1000 N (11–225 lbf), with non-magnetic lab units commonly in the 50–300 N (11–67 lbf) band, and supplies both OEM integration and aftermarket replacement from the same platform.
Conclusion
A non-magnetic gas spring for laboratory equipment is a material and geometry decision before it is a force decision. The panels are light; what makes the job specialised is that the component shares a bench with a measurement it must not disturb, and it usually has to do that inside a cramped enclosure where the mounting angle quietly eats into the usable force.
The two things that go wrong most often are predictable: sizing by rated force while ignoring the mounting angle, and qualifying the body while leaving a ferromagnetic fitting in the chain. Both are avoided by working the geometry for near-perpendicular action and specifying the whole assembly around 316L against the instrument’s own tolerance.
Newtone builds non-magnetic gas springs to order in 316L, with documentation and engineering support to feed your sensitivity review. Share your application, panel weight, and envelope, and we will recommend a configuration — typically within 5 business hours.
Get a Specification or Quote
Tell us your instrument, panel weight, available space, and the sensitivity of the nearby measurement. Our engineering team handles material selection, force calculation, and a geometry that fits.
