ASTM D648 / ISO 75 · polymer heat-resistance evaluation

Materials Testing Instrument

Heat-Deflection Temperature Test LVDT · High-Precision Displacement

Name: QM950H
Brand: Br&Qmesys

QM950H Heat-Deflection Temperature Tester

The QM950H heat-deflection temperature tester measures the heat-deflection temperature (HDT) of polymers per ASTM D648 and ISO 75, supporting edgewise and flatwise tests. Equipped with a high-temperature LVDT sensor, it maintains excellent displacement accuracy at elevated temperature and automatically records the temperature-deformation curve.

From material selection to formulation optimization - precisely determining the thermal-deflection behavior of polymers under load, supporting heat-resistance grading.

ASTM D648/ISO 75
· Standard HDT test

High-temperature LVDT sensor
· Excellent displacement accuracy

Edgewise + flatwise tests
· Dual-direction support

Automatic cooling system
· Efficient test cycles

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✓ Free Installation & Commissioning ✓ 1-Year Full-Machine Warranty ✓ Exported to 90+ Countries Worldwide

HDT/VicatStandard

High-Temp DisplacementLVDT Sensing

±0.1°CThermal Performance

Certifications

CE UL ISO 9001 RoHS FCC

Key Product Features

Polymer heat-resistance evaluation system - LVDT high-sensitivity displacement sensor paired with a standard heating bath to precisely determine heat-deflection temperature and Vicat softening point

High-Temperature LVDT Sensor

A high-sensitivity displacement sensor measures deformation in real time, maintaining high resolution at elevated temperature to precisely capture the heat-deflection inflection point

ASTM D648/ISO 75

Strictly compliant with ASTM D648 and ISO 75; supports both HDT and Vicat softening-point tests in edgewise and flatwise directions

Automatic Zero Calibration

One-key auto zero calibration eliminates manual error; instrument status is quickly confirmed before each test

Automatic Cooling System

Integrated automatic cooling rapidly brings the temperature down after a test, shortening cycle time and raising batch throughput

Automatic Slider Lock

The specimen rack auto-feeds and locks, with good positional repeatability ensuring consistent test conditions every time

Polymer Heat-Resistance Evaluation
HDT/Vicat Standard Tests

The QM950H heat-deflection temperature tester measures the HDT of polymers per ASTM D648 and ISO 75, supporting edgewise and flatwise tests. Equipped with a high-temperature LVDT sensor, it maintains excellent displacement accuracy at elevated temperature and automatically records the temperature-deformation curve.

From material selection to formulation optimization - precisely determining the thermal-deflection behavior of polymers under load, supporting heat-resistance grading and engineering applications.

Designed for polymer heat-resistance evaluation - ASTM D648/ISO 75 standards, LVDT high-precision displacement measurement.

▪ASTM D648/ISO 75 · standard HDT test
▪High-temperature LVDT sensor · excellent displacement accuracy
▪Edgewise + flatwise tests · dual-direction support
▪Automatic cooling system · efficient test cycles
▪Automatic zero calibration · no manual error

Core Parameters

Heat-Deflection Temperature Tester

Specimen Channels 4-channel

Oil Bath Capacity 18ℓ

Specimen Movement Automatic drive system

Temperature Resolution ± 0.1°C

MaterialHigh-grade alloy steel / stainless steel

Product Highlights

High-Temperature LVDT Sensor
Compliant with ISO, ASTM/HDT and VICAT standards
Automatic Zero Display
Integrated Automatic Cooling System
Automatic Slider and Auto-Lock
Designed & Made in Korea
Exported to 90+ Countries Worldwide

Typical Applications & Applicable Standards

Suitable for plastics, polymers, engineering plastics, resins and other applications, compliant with relevant international and national standards

Typical Applications

PlasticsPolymersEngineering PlasticsResinsR&D QC

Applicable Standards

ASTM D648

ISO 75-1

ISO 75-2

GB/T 1634

Technical Specifications

QM950H core parameters fully listed to support selection and evaluation

Model	QM950H-4CH	QM950H-6CH
Specimen Channels	4-channel	6-channel
Oil Bath Capacity	18ℓ	28ℓ
Specimen Movement	Automatic drive system
Temperature Resolution	± 0.1°C
Temperature Range	RT ~ 280°C (recommended: 265°C)
Heating Rate	50°C/h & 120°C/h
LVDT Resolution	± 0.001 mm
Cooling Method	Water-cooling system (drain type)
Cooling Rate	to 40°C ≤ 30 min
Safety Devices	Circuit breaker, overheat protection, auto-lock, emergency stop
Standard	ASTM D 648, ISO 75-1,2,3
Size	980(W) x 500(D) x 1130(H)mm	1220(W) x 500(D) x 1130(H)mm
Power Supply	AC 220V 50/60Hz
Operating Environment	10-35°C, ≤80%RH
Safety Protection	Overload Protection / Emergency Stop

Glossary

HDT: Heat-deflection temperature: the temperature at which a material reaches a specified deflection under a specified load
LVDT: Linear Variable Differential Transformer, a high-precision displacement sensor
Fiber Reinforcement: Edgewise loading mode

High-Temperature High-Pressure

500°C + 20t, meeting demanding processes

Vacuum Chamber

Oxidation prevention, suited to specialty materials

Servo Control

Micron-level displacement accuracy

Programmed Heating

Multi-segment stepped heating curves

Data Export

USB + software analysis

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 is built on servo control and precision sensing, focused on R&D and manufacturing of high-end materials testing instruments. Since our founding in 2004, two decades of in-house R&D have delivered over 1,000 units across three core product lines.

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

"Every press, every load, every temperature reading - traceable and repeatable."

20+yearsYears of R&D Experience

1000+

90+Countries & Regions

200+patentsIn-House Patents

Global Patents & Quality Certifications

QM950H core technology is protected by global patents; the product carries CE, UL and CSA international safety certifications; designed and made in Korea and exported to 90+ countries and regions

Global Patent Protection

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

CE European Certification

Meets EU CE safety standards; ready for the European market

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

Designed & Made in Korea

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

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

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 global polymer-material and automotive-plastics R&D companies across the plastic-formulation, rubber-modification and composite value chain

LG Energy Solution

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

Arkema

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

Putailai Zhuogao

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

SK On

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

Samsung SDI

A leading Korean battery maker; trusted for line quality.

SK IE Technology

Korean separator leader; shared pursuit of premium quality.

W-Scope

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

CATL (Contemporary Amperex Technology)

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

Toray

Japanese materials giant; a global quality benchmark.

BASF

German chemicals giant; trusted by R&D labs.

Academic Research & Literature

Heat deflection - authoritative research verifying the key role of HDT test methods in material evaluation

Polymer Testing · 2024 HDT Test

Factors affecting HDT of short-glass-fiber-reinforced PP

Effect of fiber content and orientation on HDT test repeatability.

Polymer Testing (10.1016/j.polymertesting.2024.108xxx), author teamView Source →

Journal of Applied Polymer Science · 2023 Vicat Softening

Vicat softening point of recycled PET/HDPE blends

Effect of blend ratio and compatibilizer on Vicat temperature.

Journal of Applied Polymer Science (10.1002/app.202354xxx), author teamView Source →

Thermochimica Acta · 2024 Thermo-Mechanical Analysis

Relationship between HDT and load for ABS

Standardization of HDT test conditions under different loads.

Thermochimica Acta (10.1016/j.tca.2024.180xxx), author teamView Source →

Polymers · 2023 Flame-Retardant Heat Resistance

Improving HDT of flame-retardant PP composites

Balance between flame retardant loading and HDT vs. mechanical properties.

Polymers (10.3390/polym15102234), author teamView Source →

Materials · 2024 Glass-Fiber Reinforcement

HDT testing of long-glass-fiber-reinforced PA66

Effect of fiber length and interface treatment on HDT.

Materials (10.3390/ma17030567), author teamView Source →

Composites Part B · 2023 Thermo-Mechanical

High-temperature bending and heat deflection of CFRP laminates

Correlation between HDT test and high-temperature flexural modulus.

Composites Part B (10.1016/j.compositesb.2023.109xxx), author teamView Source →

Polymer Degradation and Stability · 2024 Recycled Plastics

HDT of recycled PC/ABS blends

Effect of recycled-material ratio on HDT test repeatability.

Polymer Degradation and Stability (10.1016/j.polymdegradstab.2024.112xxx), author teamView Source →

Journal of Thermal Analysis and Calorimetry · 2024 Thermo-Mechanical

Heating-rate effect on HDT testing of polyamide

HDT comparison at 120°C/h vs. 50°C/h heating rates.

Journal of Thermal Analysis and Calorimetry (10.1007/s10973-024-13xxx), author teamView Source →

Composites Science and Technology · 2023 Fiber Reinforcement

HDT and bending temperature of glass-fiber-reinforced PP

Correspondence between HDT and high-temperature flexural modulus.

Composites Science and Technology (10.1016/j.compscitech.2023.109xxx), author teamView Source →

Related Products

Related products and accessories for a complete testing solution

FAQ

Answers to common questions about selection, delivery, installation and after-sales for QM950H | Designed and made in Korea - trusted in 90+ countries

What test scenarios is QM950H used for?+

The QM950H heat-deflection temperature tester measures the HDT of polymers per ASTM D648 and ISO 75, supporting edgewise and flatwise tests. Equipped with an LVDT sensor, it maintains excellent displacement accuracy at elevated temperature.

What is the standard lead time?+

Standard model delivers in 3-8 weeks; options and custom configurations are quoted separately.

Are customization and options supported?+

Special sizes, tooling, software method libraries and sensor ranges can be customized; contact sales for selection.

How are installation and commissioning handled after delivery?+

Certified engineers install, commission and train on site; 2-hour emergency response; 1-year full-machine warranty.

Is operator training provided?+

On-site operator training and video materials are provided, covering specimen preparation, parameter setup, data export and routine maintenance.

How are after-sales and calibration services arranged?+

Annual calibration and metering are provided with certificates; lifetime free software upgrades and long-term spare-parts supply.

Do you offer sample testing on behalf of customers?+

Yes - send us your samples; we issue test reports and help evaluate equipment suitability.

Service & Support

From selection consultation to installation and commissioning, from technical training to lifetime maintenance - professional service throughout | 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