CBY1 GW25-3 High-Temperature Extensometer by SINOTEST
| Brand | SINOTEST |
|---|---|
| Origin | Jilin, China |
| Manufacturer Type | Direct Manufacturer |
| Model | CBY1 GW25-3 |
| Operating Temperature | 1000 °C |
| Sensitivity | ≥1.3 mV/V |
| Gauge Length | 25 mm |
| Measurement Range | 3 mm |
| Country of Origin | China |
Overview
The CBY1 GW25-3 High-Temperature Extensometer is a precision contact-type strain measurement instrument engineered for real-time axial deformation monitoring of materials under extreme thermal conditions. Designed specifically for integration with high-temperature furnaces and induction heating systems, it operates continuously at temperatures up to 1000 °C—enabling accurate strain acquisition during tensile, creep, stress-relaxation, and thermal expansion testing of metallic alloys, advanced ceramics, refractory composites, and high-performance polymers. Its mechanical design follows classical lever-arm amplification principles, coupled with a temperature-compensated full-bridge strain gauge transducer, ensuring stable output signal integrity despite thermal drift. Unlike optical or non-contact methods, this extensometer maintains direct physical engagement with the specimen, delivering high signal-to-noise ratio and sub-micron resolution in displacement detection under dynamic thermal loading.
Key Features
- Robust ceramic-coated lever arms and high-temperature alloy linkages ensure structural stability and minimal thermal expansion error at 1000 °C
- Integrated dual-spring preloading mechanism guarantees consistent contact force across the full operating temperature range, preventing slippage or loss of grip during thermal cycling
- Strain gauge transducer with ≥1.3 mV/V sensitivity and built-in temperature compensation circuitry minimizes zero drift and improves long-term measurement reproducibility
- Fixed 25 mm gauge length optimized for ASTM E21, ISO 6892-2, and GB/T 4338 standard-compliant high-temperature tensile testing
- 3 mm full-scale deflection range supports both elastic and early plastic strain quantification in ductile and semi-brittle materials
- Standard 0–10 V analog output compatible with universal data acquisition systems (e.g., MTS TestSuite, Instron Bluehill, or LabVIEW-based DAQ platforms)
Sample Compatibility & Compliance
The CBY1 GW25-3 is validated for use with cylindrical, flat, and notched specimens conforming to ASTM E8/E8M (tensile testing of metals), ASTM E21 (high-temperature tensile tests), ISO 6892-2 (metallic materials — tensile testing at elevated temperatures), and GB/T 4338 (metallic materials — tensile testing at elevated temperatures). It accommodates specimen widths from 3 mm to 25 mm and thicknesses up to 12 mm, with optional custom jaw inserts available for specialized geometries. All materials in direct contact with the specimen—including tungsten carbide-tipped jaws and alumina insulating bushings—meet ISO 17025 traceability requirements for dimensional metrology. The device does not require recalibration between 200 °C and 1000 °C when used within specified thermal ramp rates (≤10 °C/min), supporting GLP-compliant test documentation workflows.
Software & Data Management
While the CBY1 GW25-3 functions as a standalone analog sensor, its output integrates seamlessly into industry-standard testing software environments. When paired with compliant DAQ hardware, it supports time-synchronized acquisition of strain, load, temperature (via thermocouple input), and crosshead displacement—enabling full stress–strain curve reconstruction per ASTM E139 and ISO 204. Raw voltage signals are linearized using factory-provided calibration coefficients (supplied with NIST-traceable certificate), and digital post-processing supports automatic yield point detection, modulus calculation (secant/tangent), and creep parameter extraction (e.g., minimum creep rate, time to rupture). Audit trails, electronic signatures, and data immutability features align with FDA 21 CFR Part 11 requirements when deployed in regulated QA/QC laboratories.
Applications
- High-temperature tensile characterization of nickel-based superalloys (e.g., Inconel 718, Hastelloy X) for aerospace turbine component qualification
- Ceramic matrix composite (CMC) strain monitoring during thermal shock testing and oxidation resistance evaluation
- Creep behavior analysis of ferritic/martensitic steels (e.g., P92, NF709) for nuclear power plant piping lifetime modeling
- Thermal expansion coefficient (CTE) determination of glass-ceramics and low-expansion sealants used in vacuum feedthroughs and semiconductor processing equipment
- Process validation of hot isostatic pressing (HIP) cycles through in-situ strain feedback control
FAQ
What is the maximum recommended heating rate for reliable operation?
The extensometer is qualified for thermal ramp rates up to 10 °C/min; faster rates may induce transient thermal gradients affecting mechanical linkage response.
Can it be used in vacuum or inert gas environments?
Yes—its all-metal construction and absence of organic adhesives or elastomeric seals make it suitable for high-vacuum (<10⁻⁴ Pa) and argon/nitrogen-purged chambers.
Is calibration traceable to international standards?
Each unit ships with a NIST-traceable calibration certificate covering sensitivity, linearity, and thermal zero shift across the 200–1000 °C range.
How is thermal expansion of the extensometer body compensated?
The lever arm assembly uses matched Coefficient of Thermal Expansion (CTE) materials, and the strain gauge bridge includes passive temperature compensation resistors to suppress parasitic output drift.
Does it support automated test sequences with closed-loop strain control?
When interfaced with controllers supporting analog feedback (e.g., MTS FlexTest or Instron 3500 series), it enables strain-controlled ramp-hold protocols per ASTM E209 and ISO 15579.
