Carbolite Gero AZ Series 8-Zone Horizontal Tube Furnace

Overview

The Carbolite Gero AZ Series is an engineered 8-zone horizontal tube furnace designed for precise thermal processing under controlled atmospheric conditions. Unlike single- or dual-zone furnaces, the AZ platform employs eight independently regulated heating zones along the furnace length—each monitored by a dedicated thermocouple and driven by a dedicated power module. This architecture enables active temperature gradient formation across the working tube, supporting applications requiring linear ramping, stepped thermal profiles, or extended isothermal zones. The furnace operates on the principle of resistive heating through embedded high-stability heating elements, thermally isolated by a multi-layer ceramic fiber insulation system. Each insulation layer is precisely overlapped and gap-free assembled to minimize radial and axial heat leakage—directly contributing to improved temperature uniformity (±1°C typical within defined isothermal zones) and reduced external surface temperatures (<60°C at ambient conditions). Its horizontal orientation, combined with modular tube mounting and flange-integrated sealing, facilitates seamless integration with gas delivery systems, vacuum manifolds, and in-line process monitoring hardware.

Key Features

• Eight independently controllable heating zones with zone-specific thermocouple feedback and PID tuning
• Integrated digital controller with touchscreen interface—supports up to 32 programmable segments per profile, including ramp rates, dwell times, and loop repeats
• Ceramic fiber insulation system constructed from multiple staggered layers; eliminates thermal bridging and enhances axial/radial uniformity
• Air-cooled structural housing—no water cooling required except when interfacing with oil-based vacuum pumping systems at the tube flange
• Over-temperature protection circuit operating independently from the main controller, safeguarding samples and furnace integrity during unattended operation
• Modular tube compatibility: standard configurations support quartz, alumina, silicon carbide, and stainless-steel tubes with internal diameters ≥60 mm
• Optional Siemens SPS controller upgrade with web-enabled HMI, real-time diagnostics, and integrated alarm management

Sample Compatibility & Compliance

The AZ furnace accommodates diverse sample geometries—including crucibles, boats, substrates, and custom fixtures—via standardized tube-mounting interfaces and L-type support brackets. Vertical orientation adapters and radiation shielding plugs are available to suppress convective losses and improve thermal stability during low-mass or high-emissivity sample processing. For regulated environments, the system supports compliance with ISO/IEC 17025 calibration traceability protocols. When equipped with certified data loggers and timestamped profile execution, it meets foundational requirements for GLP and GMP documentation—including electronic signature capability, user access levels, and audit trail generation (aligned with FDA 21 CFR Part 11 principles when deployed with compliant software infrastructure). Vacuum configurations comply with ISO 27492 for leak rate verification and can be validated per ASTM E595 for outgassing performance in space-grade material testing.

Software & Data Management

The standard controller provides local data logging at user-defined intervals (1–60 s), storing time-stamped temperature, setpoint, power output, and alarm status to internal memory (≥10,000 records). Export is supported via USB or serial interface in CSV format for post-processing in Excel or statistical analysis platforms. Optional Ethernet connectivity enables remote monitoring via Modbus TCP or OPC UA protocols—allowing integration into centralized SCADA or MES systems. With the Siemens SPS option, users gain browser-based configuration, live trending dashboards, automated report generation (PDF/Excel), and secure role-based access control. All logged data includes metadata such as operator ID, profile name, start/stop timestamps, and firmware revision—ensuring full reproducibility and alignment with quality management system (QMS) record retention policies.

Applications

The AZ furnace serves advanced materials research and industrial process development where spatial thermal control is critical. Typical use cases include: controlled atmosphere sintering of oxide and non-oxide ceramics; multi-stage annealing of semiconductor wafers; catalyst activation under reducing atmospheres; thermal gravimetric coupling with mass spectrometry (TGA-MS); crystal growth via temperature gradient zone melting (TGZM); and pre-treatment of battery electrode materials prior to electrochemical testing. Its ability to sustain stable gradients over lengths up to 1,200 mm makes it suitable for simulating thermal profiles encountered in continuous kiln processes—enabling lab-scale validation before pilot-line deployment.

FAQ

Can the AZ furnace operate under vacuum without modification?
Yes—vacuum-ready configurations are factory-assembled with metal-sealed flanges and optional vacuum ports. Mechanical pump packages achieve ≤10⁻² mbar; turbomolecular options extend to ≤10⁻⁷ mbar.
Is calibration certification included with purchase?
A UKAS-accredited temperature mapping report (per ASTM E220) is available as an optional add-on, covering all eight zones across the operational range (up to 1200°C).
What tube materials are compatible with maximum temperature ratings?
Quartz tubes support up to 1100°C in inert atmospheres; high-purity alumina tubes are rated to 1600°C; silicon carbide variants operate continuously to 1500°C in air or nitrogen.
Does the controller support recipe import/export between instruments?
Yes—the native file format (.azp) is portable across AZ-series units and retains all segment parameters, safety limits, and logging settings.
How is temperature uniformity verified across the 8 zones?
Uniformity is validated using a 9-point thermocouple traverse per zone during factory acceptance testing (FAT), documented in the IQ/OQ package supplied with each unit.