Thermo Scientific™

Varistain™ Gemini ES Automated Slide Stainer

 Related applications:
Anatomical Pathology
Maximize efficiency by organizing staining workflow with the multidimensional Thermo Scientific™ Varistain™ Gemini ES Automated Slide Stainer. The Gemini ES is an open system that utilizes Thermo Scientific stains and reagents. This stainer's single button, easy-to-use software schedules runs, allocates reagents, optimizes reagent layout, and calculates the most efficient route for each protocol.

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  • Loads 20-slide baskets with up to 100 slides at once
  • Step-start available from any station
  • Urgent Start gives user opportunity to prioritize “urgent” baskets
  • Auto-return allows user to recall any loaded basket to load door
  • Suggested staining protocols can be easily modified to lab procedures
  • Capable of managing multiple protocols without affecting throughput

Quality Control and Safety Features

  • Displays reagent usage and batch throughput
  • Controls fumes through an easy-to-change carbon filter or an optional external vent adapter kit
  • Offers optional passcode protection to secure customized protocols
  • Battery backup provides approximately 40 min. of power in the event of a power failure
  • Smart software keeps unit's robotic arm from entering user access areas

Physical Specifications

  • D × W × H: Stainer, 28 × 28.5 × 34.5 in. (71 × 72 × 88cm)
  • Power supply, 18.5 × 14 × 5.75 in. (46.3 × 35 × 14.5cm)
  • Weight: Stainer, 176 lb. (80kg); Power supply, 22 lb. (10kg)
  • Electrical requirements: 300VA
  • Two-level design minimizes footprint while making all stations easily accessible

Ordering Information

Available with or without five independently heated positions for drying slides.


A total of six water stations, 26 reagent stations, and four configurable loading and unloading stations

  • Charcoal filter
  • Staining basket and carrier (two packs of five each)
  • Three-well water station (two fitted)
  • Pack of six single pot covers
  • Pack of four multi-pot covers
  • 8′ (2.5m) long water inlet hose
  • Cytology stainer (without heat)
  • 35 stain pots supplied, fitted
  • Histology stainer (with heat)
  • 30 stain pots supplied, fitted
  • Pack of three spare staining pots
  • Monitor cable
  • Screened data cable
  • Operator manual (specify language)
  • Service record book


Manuals & protocols