External Adjustable Probe Stage AECH400V-EM/EB

Key features

• −190 to 400 °C, LN₂ + resistiveLiquid-nitrogen cooling and resistive heating at ±0.1 °C stability — Max heating 150 °C/min, Max cooling 40 °C/min.
• Externally adjustable probes, XYZ ±6 mmProbe position is adjusted from outside the chamber over an XYZ travel of ±6 mm: the EM uses built-in positioning stages with micrometer heads, the EB uses external positioning stages connected via bellows.
• Coaxial probes ×4, triaxial BNCFour gold-plated tungsten-carbide coaxial probes with signals out on triaxial BNC ×4 to compatible electrical measurement instruments such as a source meter or digital multimeter.
• Grounded or floating stageSilver 23 × 23 mm sample stage; the stage surface can be grounded or electrically floating, selectable to match the measurement configuration.
• Vacuum chamberBoth models use vacuum chambers. When configured with the optional vacuum system and operated under vacuum, they can reduce the oxidant supply — actual performance depends on the achieved pressure and test conditions (see the simulator below).
• Reflection optics, JGS2 windowφ25 × 1 mm top window in JGS2 quartz glass (220–2500 nm), hand-removable and replaceable; window-to-stage distance 25 mm (EM) or 16.5 mm (EB).

Product specifications

Basic configuration

Options include adapter plates, custom liquid-nitrogen tanks, custom water circulators, a vacuum system, custom probes and probe interfaces, host PCs, and custom control software — confirmed at quotation.

Cooling to −190 °C? Plan the run

Set the target temperature your experiment needs and press Start: three curves — LN₂, TEC, and natural cooling — race downward, and the verdict line shows which technologies arrive and when. The AECH400V-EM/EB cool with liquid nitrogen at up to 40 °C/min toward the −190 °C floor:

Model: controller-limited linear ramps with a Newton-type exponential approach as each curve nears its technology floor — LN₂ at up to ~40 °C/min toward −190 °C, TEC at up to 30 °C/min toward −25 °C — a simplified schematic of how cooling may slow as the target temperature is approached. For the technologies compared here, TEC-based InSitu Pro™ stages are specified down to −25 °C, while the AECH400V-EM/EB use liquid-nitrogen cooling to reach temperatures down to −190 °C; actual cooling performance depends on heat load, stage configuration, and operating conditions. Curves are schematic family-level behaviour, not performance data for a specific stage or sample.

Heating in the vacuum chamber? See what it suppresses

When operated in air at elevated temperature, many metals and alloys may oxidize — the extent depends on material composition, surface condition, temperature, atmosphere, and exposure time. Both models here run a vacuum chamber, so the vacuum panel of the simulator is the relevant case: hold a sample for an hour at a temperature within the simulator range and compare the two panels:

Model: parabolic oxidation x² = k·t with an Arrhenius rate constant — an approximation for diffusion-controlled oxidation, not every material or temperature; the vacuum panel suppresses the oxidant supply, which is the relevant case for the AECH400V-EM/EB vacuum chamber (actual behavior depends on the achieved pressure). The simulator covers 200–1000 °C; only the 200–400 °C portion overlaps the AECH400V-EM/EB operating range — settings above 400 °C do not apply to these stages. Curves are schematic, not performance data for a specific stage or sample.

Magnetic, externally adjustable, or electronic? · quick navigation

FAQ

Related

• InSitu Pro™ Stage Selector — answer five questions and match the whole range with a one-click quote.
• Electrical H&C Stage AECH600S/AECH400SV — the magnetic-probe LN₂ siblings, −190 to 600 / 400 °C, atmosphere or vacuum.
• Electrical H&C Stage AECH600/AECH400V — the fixed-probe LN₂ siblings, −190 to 600 / 400 °C, atmosphere or vacuum.
• Precision Electronic Adjustable Probe Stage AECH400V-EC — electronic probe adjustment in the same −190 to 400 °C class.
• In-Situ Stages: A Theory Guide — the physics behind variable-temperature transport and probe measurements.

Disclaimer: ACS Material, LLC believes the information on this page is accurate and represents the best and most current information available to us. Specifications reflect the manufacturer's current datasheet; idealized values are benchmarks and final configurations are confirmed at quotation — always refer to the model datasheet for guaranteed ratings. The interactive simulators are schematic teaching tools, not performance data for a specific unit. ACS Material makes no representations or warranties, express or implied, regarding suitability for any purpose, and will not be responsible for damages resulting from use of or reliance upon this information.