InstruTech Hornet Hot Cathode Ion Gauge

InstruTech “Hornet” IGM401 Hot-Cathode Ionization Gauge Module

The InstruTech Hornet IGM401 is a compact, miniature Bayard-Alpert hot-cathode ion gauge module featuring a built-in controller and OLED display—offering ultra-high vacuum measurement from about 1 × 10⁻⁹ Torr to 5 × 10⁻² Torr. Designed for tight spaces and effortless integration, it’s a direct replacement for legacy Micro-Ion modules and brings modern usability with digital communications and safety features. :contentReference[oaicite:0]{index=0}

Key Features

• Broad UHV range: Measures 1 × 10⁻⁹ to 5 × 10⁻² Torr—ideal for analytical and research applications. :contentReference[oaicite:1]{index=1}
• All-in-one module: Integrates controller, bright OLED display (user-selectable units), analog output, setpoint relay, and RS-485—all without external electronics. :contentReference[oaicite:2]{index=2}
• Auto-ranging emission current: Automatically switches between 100 µA and 4 mA for optimized accuracy across vacuum regime. :contentReference[oaicite:3]{index=3}
• Plug-and-play replacement: Compatible with Granville-Phillips® Micro-Ion® modules, simplifying upgrades with minimal system changes. :contentReference[oaicite:4]{index=4}
• Dual filament options: Choose yttria-coated iridium for general use or tungsten for aggressive gases. :contentReference[oaicite:5]{index=5}
• Compact mounting choices: Available in multiple flange types—NW16/25/40 KF, Mini-Conflat, Cajon VCR, and more. :contentReference[oaicite:6]{index=6}

Technical Summary

• Measurement Range: 1 × 10⁻⁹ to 5 × 10⁻² Torr (N₂ typical accuracy ±15%, repeatability ±5%). :contentReference[oaicite:7]{index=7}
• Display: OLED, selectable units (Torr, mbar, Pa). :contentReference[oaicite:8]{index=8}
• Output & Controls: Analog log-linear output, single SPDT setpoint relay (1 A @ 30 V DC), RS-485 serial communication. :contentReference[oaicite:9]{index=9}
• Emission Control: User-selectable or auto-switching between 100 µA and 4 mA. :contentReference[oaicite:10]{index=10}
• Degas Capability: 3 W electron bombardment, operable while measuring. :contentReference[oaicite:11]{index=11}
• Power: 20–28 V DC, ~30 W, with transient protection. :contentReference[oaicite:12]{index=12}
• Filament Status & Safety: On/off status shown on display and via RS-485; overpressure auto shutdown at defined thresholds. :contentReference[oaicite:13]{index=13}

Applications

• UHV research systems, analytical instruments, and turbo-pump diagnostics.
• Semis, optics, and surface science where UHV measurement is critical and tight mounting is required.
• Legacy system upgrades—ideal drop-in upgrade for Mini-Ion modules without re-wiring. :contentReference[oaicite:14]{index=14}

Integration Tips

• Utilize auto-emission: Let the module switch between emission currents to stabilize readings automatically.
• Protect the filament: Avoid activating at pressures above 5 × 10⁻² Torr (100 µA) or 1 × 10⁻³ Torr (4 mA) to prolong life. :contentReference[oaicite:15]{index=15}
• Module control: Use RS-485 for remote operation, data logging, and configuration of degas cycles and setpoint logic.
• Compact upgrade: Ideal for replacing older gauge modules while keeping cabling and control systems intact. :contentReference[oaicite:16]{index=16}

FAQs

What vacuum range does the Hornet cover?

It measures from roughly 1 × 10⁻⁹ Torr to 5 × 10⁻² Torr, offering deep UHV sensitivity. :contentReference[oaicite:17]{index=17}

Does it involve external controllers?

No external controller is required—the module is self-contained with display, outputs, and RS-485 interface. :contentReference[oaicite:18]{index=18}

Is it plug-compatible with older systems?

Yes—it matches the Micro-Ion® standard pinouts and functions, making legacy replacements seamless. :contentReference[oaicite:19]{index=19}

Why Choose High Vac Depot?

High Vac Depot excels in sourcing advanced vacuum solutions like the Hornet IGM401. We’ll help you evaluate filament types, plan razz control (e.g., via convection gauge setpoints), and ensure compatibility with your existing vacuum stack and automation systems.

Need Help or a Quote?

Contact High Vac Depot for guidance on integrating the Hornet IGM401 into your vacuum system—or to receive a custom quote that matches your uptime and measurement needs.

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Additional information

Brand

InstruTech

InstruTech is a Colorado, USA based company specializing in the design and manufacture of vacuum measurement and control instrumentation.

InstruTech Hornet IGM401 Hot Cathode Ion Gauge Data Sheet

InstruTech Hornet IGM401 Hot Cathode Ion Gauge Operation Manual

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