Excelitas X-Cite exacte Metal Halide Fluorescence Illuminator

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Ultra-Stable Fluorescence Light Source for Microscopy

The X-Cite exacte ultra-stable fluorescence light source employs a DC-powered mercury lamp coupled with proprietary Closed-Loop Feedback technology to provide unmatched short and long-term intensity stability, for imaging protocols lasting from milliseconds to days. With the X-Cite Optical Power Measurement System, light output can also be calibrated in absolute power units (watts), ensuring truly repeatable fluorescence illumination for imaging experiments.

The X-Cite exacte microscope light source has the convenience of pre-aligned, long-life lamps and easy installation combined with innovative functions in the newest generation of mercury arc fluorescence illumination systems.


  • DC lamp with Closed-Loop Feedback: Short and long-term intensity stability
    Calibration via optional Power Meter: Provides output in watts for consistent illumination and empirical repeatability
    Adjustable Iris with 1% steps: Intensity control limits photobleaching
    Internal High Speed Shutter: Flexibility in configuring imaging systems for different applications
    Liquid Light Guide: Excellent illumination uniformity, no heat transferred to microscope
    Automatic Light Guide Detection: Ensures proper/complete insertion of light guide to optimize performance and lifetime
    Pre-aligned, 2000 hour lamp: Easy lamp replacement with no alignment required, lower running costs
    Intelli-Lamp Technology: Maintains optimum lamp temperature; tracks lamp hours
    Computer Control & GUI: Enables computer-driven applications and stability data exporting


  • X-Cite exacte Microscope Illumination System includes: Lamp module, liquid light guide with adaptor, software CD, foot pedal, USB cable, grounded and shielded power cord, user guide, quick-start guide
  • Lamp: 200W Mercury Vapor Short Arc, DC
  • Lamp Life: 2000 hours guaranteed; 2500 hours typical
  • Adaptors: Compatible with microscopes from all major manufacturers
  • Filter: Bandpass, 340-675nm
  • Power Supply: High efficiency, switch mode, line isolated 100-120VAC / 200-240VAC, 50/60Hz
  • Warm-up Period: 4-minutes (typical)
  • Connectivity: RS-232 control via USB port; PC and Mac control of lamp, iris shutter; TTL control of shutter via BNC; ready for integration in automated system
  • Drivers: Base commands same as X-Cite 120PC; Build onto existing driver scripts to control X-Cite exacte.
  • Panel Controls: Power on/off, display mode selection, intensity up/down adjustment, Closed-Loop Feedback on/off, shutter open/close
  • Panel Display: Accumulated lamp hours, intensity setting, status messages
  • Panel Status: Indicators Lamp on, shutter open, display mode, calibration, light guide insertion, Closed-Loop Feedback
  • Dimensions: (LxWxH) 13.5″ x 7″ x 8″ (34cm x 18cm x 20cm)
  • Weight: 10.8lbs (4.9kg)
  • Certifications: CE marked, certified to IEC, Canadian and US Standards; RoHS compliant
  • Warranty: 1 year (excluding lamp and light guide)
  • Patents: X-Cite exacte incorporates technology protected by the following patents: US# 5,521,392; US# 6,333,602; US# 6,437,861; US# 6,847,170; US# 7,335,901

Additional information


Equipment Condition


X-Cite exacte

Fluorescence Type

Metal Halide

Microscope Type

Stereo / Dissecting, Upright, Inverted