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Compression-Set Tester
Materials Testing Instrument

Seal Elasticity Evaluation Precise, Reliable Testing

Rubber Compression Set · Seal Elasticity Evaluation

The QM38 compression set tester measures the compression set of rubber and polyurethane. A specimen compressed to a fixed thickness is held at constant temperature for a set time; the permanent set is calculated from the height change before and after the test, per ASTM D395 and ISO 815.

Special Low-Thermal-Deformation Steel
Precision shims ±0.01 mm
Platen surface flatness ±0.001 mm
O-ring option available
Non-standard customization supported
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✓ Free Installation & Commissioning ✓ 1-Year Full-Machine Warranty ✓ Exported to 90+ Countries Worldwide
±0.01mm Shim Accuracy
ASTM D395 Applicable Standards
±0.001mm Platen Flatness
Certifications
CE UL ISO 9001 RoHS FCC
QM38 compression set tester

Key Product Features

Compression set - authoritative research validating the key role of compression-performance evaluation for rubber seals.

Low-Thermal-Deformation Steel

Made of special steel with minimal thermal deformation for dimensional stability at high temperature.

Precision Shims

Shim resolution ±0.01 mm for precise compression-ratio control

Platen Flatness

Platen surface flatness ±0.001 mm for even loading

O-Ring Dedicated Type

A dedicated O-ring compression kit is available for seal testing.

Non-Standard Customization

Platen and shim specifications can be customized to specimen dimensions.

Compression-Set Tester
Rubber Elastic-Recovery Testing

The QM38 compression set tester, designed per ASTM D395/ISO 815, compresses a specimen to a defined thickness, holds it at constant temperature and measures the permanent deformation after unloading. Special steel with low thermal deformation, precision shims ±0.01 mm, platen surface flatness ±0.001 mm, for rubber, polyurethane and other elastomers.

From seal rings to cushion pads - whether rubber recovers after long compression directly affects sealing and cushioning performance. Compression set is a key index of rubber elasticity; precision shims keep the compression ratio consistent and platen flatness ensures even loading - an essential tool for rubber-formula R&D and QC.

Designed for rubber-elasticity evaluation - precision compression fixture plus constant temperature, ASTM D395 compression set.

  • ▪ASTM D395/ISO 815 · standard
  • ▪±0.01 mm precision shims · consistent compression ratio
  • ▪±0.001 mm platen flatness · even loading
  • ▪Special steel low thermal deformation · stable at constant temperature
  • ▪Rubber/polyurethane/O-rings · compression set

Core Parameters

Compression Set
Material S45C Chrome-Plated
Shims 9.5±0.01 mm, 8 ea (custom)
Accuracy Grade Professional Grade
Applicable Standards International Certification
AccuracyCompliant with ISO/ASTM standards

Product Highlights

  • Special Low-Thermal-Deformation Steel
  • Precision shims ±0.01 mm
  • Platen surface flatness ±0.001 mm
  • O-ring option available
  • Non-standard customization supported
  • Designed & Made in Korea
  • Exported to 90+ Countries Worldwide

Typical Applications & Applicable Standards

For small-specimen testing across industries, compliant with major international and domestic standards

A

Typical Applications

RubberPolyurethaneO-RingsSealsElastomersFoam Materials
S

Applicable Standards

ASTM D395
ISO 815
GB/T 7759
JIS K6262
ASTM D3574
ISO 2285
ASTM D638

Technical Specifications

Detailed technical specifications; scales and indenters fully annotated

ParameterQM38
MaterialS45C Chrome-Plated
Plate Dimensions20T 200W x 120D / three columns
Shims9.5±0.01 mm, 8 ea (custom)
StandardASTM D 395,D 3574, JIS K 6252 ISO 815,2285
Power SupplyAC 220V 50/60Hz
Operating Environment10-35°C, ≤80%RH
Safety ProtectionOverload Protection / Emergency Stop

Glossary

Compression Set
The residual deformation rate after a specimen held compressed at constant temperature is unloaded
S45C
High-quality carbon steel, chrome-plated
Shims 9.5±0.01 mm
Standard compression shims, accuracy ±0.01 mm
ASTM D395 / ISO 815
Rubber compression-set standards
Rubber/Polyurethane
Typical tested materials

Material S45C Chrome-Plated

Rigid and corrosion-resistant

Shims 9.5±0.01 mm

High-precision thickness setting

Compliant with ASTM D395/ISO815

Meets rubber compression-set standards

Multi-Shim Combinations

9.5 mm and other ranges customizable

Constant-Temperature Compression Test

Evaluates elastic recovery

Specifications are for reference only; final configuration, accuracy and certifications are governed by the signed technical agreement. Products are continuously improved; appearance and specifications may change without notice.

Built on Korean Precision Manufacturing
Serving Global Materials Innovation

Br&Qmesys Scientific Instruments, built on servo control and precision sensing as its technical core, focuses on the R&D and manufacturing of high-end materials physical-property testing instruments. Since its founding in 2004, it has accumulated twenty years of in-house R&D, with cumulative deliveries across three core product lines exceeding one thousand units.

Exported to 90+ countries and regions, serving over a thousand research institutes and high-end manufacturers across the lithium battery, polymer, semiconductor and aerospace sectors.

"Every pressurization, every loading, every temperature reading - fully traceable and repeatable."

0+years Years of R&D Experience
0+
0+ Countries & Regions
0+patents In-House Patents

Global Patents & Quality Certifications

QM38 core technology is protected by global patents; the product carries CE, UL and CSA international safety certifications, is designed and made in Korea, and is exported to 90+ countries and regions.

P

Global Patent Protection

Core technology protected by global patents; high-precision measurement and automated testing processes

CE

CE European Certification

Meets EU CE safety standards; ready for the European market

UL

UL US Certification

Meets US UL safety standard (UL 61010-1); hassle-free export to the US

CSA

CSA Canadian Certification

Meets Canadian CSA safety standard; hassle-free export to North America

KR

Designed & Made in Korea

Designed & made in Korea; exported to 90+ countries and regions

KC

KC Korean Safety Certification

Meets Korean KC safety standard; satisfies local electrical-safety requirements

RoHS

RoHS Environmental Certification

Compliant with the EU RoHS directive; eco-compliant for global markets

FCC

FCC US Certification

Meets US FCC EMC standard; smooth access to the US market

ISO

ISO 9001 Quality Management System

ISO 9001 certified; traceable quality control throughout the process

QC

Three-Tier Factory Calibration

Every unit undergoes three-tier calibration and burn-in before shipment, with calibration certificate and test report included

Typical Customers & Applications

Serving leading new-energy materials companies worldwide, across the full value chain of Korean power batteries, lithium-battery separators and solid-state electrolytes.

LG logo

LG Energy Solution

A world-leading lithium-ion battery maker and long-term partner.

Arkema logo

Arkema

French specialty-chemicals giant; a trusted R&D partner.

Putailai logo

Putailai Zhuogao

Leading separator-coating materials maker; a precision-measurement partner.

SK logo

SK On

Leading Korean power-battery maker; co-developed factory acceptance standards.

SDI logo

Samsung SDI

A leading Korean battery maker; trusted for line quality.

SKT logo

SK IE Technology

Korean separator leader; shared pursuit of premium quality.

WS logo

W-Scope

Specialist Korean separator maker; a long-standing stable partner.

CATL logo

CATL (Contemporary Amperex Technology)

World's largest power-battery maker; validated at scale.

TR logo

Toray

Japanese materials giant; a global quality benchmark.

BF logo

BASF

German chemicals giant; trusted by R&D labs.

Academic Research & Literature

Compression-set testing - authoritative research support for evaluating rubber/polyurethane elastic recovery and compressive stress.

Polymer Testing · 2024 Compression Set

Effect of temperature on NBR compression set

Compression set after 125 °C hot-air aging.

Polymer Testing (10.1016/j.polymertesting.2024.115xxx), author teamView Source →
Rubber Chemistry and Technology · 2023 Sealing

Compression set of O-ring seals

Effect of cure systems on seal compression set.

Rubber Chemistry and Technology (10.5254/rct.23.7xxxx), author teamView Source →
Journal of Elastomers & Plastics · 2024 Compressive Stress

Compression stress-relaxation behavior of silicone rubber

Stress relaxation and seal failure under long-term compression.

Journal of Elastomers & Plastics (10.1177/0095244324xxxx), author teamView Source →
Polymers · 2023 EPDM

Compression-set testing of EPDM seals

Effect of hot-air aging on EPDM compression set.

Polymers (10.3390/polym15193912), author teamView Source →
Sealing Technology · 2024 Sealing Rings

Compression-set life of hydraulic O-rings

Predicting seal-ring life under temperature and pressure.

Sealing Technology (10.1016/S1350-xxxx(24)xxxx), author teamView Source →
Materials & Design · 2023 Compression Performance

Compressive stress/strain curves of flexible foam

Compression-set testing of polyurethane foam.

Materials & Design (10.1016/j.matdes.2023.112xxx), author teamView Source →
Sealing Technology · 2024 O-Rings

Compression-set life of NBR O-rings

Effect of temperature on seal compression set.

Sealing Technology (10.1016/S1350-xxxx(24)xxxx), author teamView Source →
Rubber Chemistry and Technology · 2024 Sealing

Compression stress-relaxation behavior of silicone rubber

Stress relaxation and seal failure under long-term compression.

Rubber Chemistry and Technology (10.5254/rct.24.10xxxx), author teamView Source →
Polymers · 2024 EPDM

Compression set of EPDM seals after hot-air aging

Effect of 125 °C aging on compression set.

Polymers (10.3390/polym16071234), author teamView Source →

FAQ

Answers to common questions about QM38 purchasing, delivery and service.

What scenarios is the QM38 compression set tester mainly used for? +

It measures compression set of elastomers such as rubber, polyurethane and O-rings: the specimen is compressed to a defined thickness and held at constant temperature for a set time, and the residual deformation after unloading is measured to rate elastic recovery - a core index for seal and elastomer selection.

What are the core specifications of the QM38? +

Per the specification table: platen material S45C chrome-plated, standard shims 9.5±0.01mm (dimensions customizable), platen size 200(W)x100(D)x20(H) mm (three-stage).

How are compression ratio and measurement accuracy ensured? +

Special-steel platens with minimal thermal deformation; precision shim resolution ±0.01mm, platen surface flatness ±0.001mm, with compression precisely set by shim thickness, ensuring a consistent compression ratio within a batch and repeatable post-unloading height-difference measurement.

Is a companion oven required for testing? +

Compression set requires holding at a defined temperature; the device is a compression fixture frame used with a constant-temperature oven such as the QM230/QM240, while the room-temperature method can run directly in the lab.

Which test standards are supported? +

Compliant with ASTM D395, ASTM D3574, JIS K6252, ISO 815, ISO 2285 and other rubber/flexible-foam compression-set test methods.

Which options can be customized? +

A dedicated O-ring compression kit, special multi-size platens and custom shims are supported, configured to specimen shape and compression-ratio requirements.

What is the lead time for standard models? +

Standard-model lead time is 3-8 weeks; custom platens and shims follow the contracted lead time agreed after confirmation.

How are certification and after-sales service secured? +

The instrument carries CE / ISO 9001 system certifications, and is calibrated and aged before shipment; after-sales includes 2 hours emergency response, on-site installation and commissioning by certified engineers, a full-machine 1-Year Warranty and lifetime software upgrades.

Service & Support

From selection consultation to installation and commissioning, from technical training to lifetime maintenance - full-process professional service. | 2-hour response · 1-year warranty · lifetime maintenance

Response Time

2-Hour Emergency Response

Installation & Commissioning

Certified On-Site Engineers

Warranty

1-Year Full-Machine Warranty

Software Upgrades

Free Lifetime Upgrades

Compression set,elasticity evaluation

The QM38 compression set tester evaluates elastic recovery of rubber and polyurethane per ASTM D395/ISO 815.

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