Percival Scientific Biological Incubator Model I-66NL
High-capacity non-lighted biological incubator optimized for multi-tier organism rearing and experimental applications.
The Percival I-66NL Biological Incubator is engineered for laboratories performing drosophila culture, organism rearing, bioassays, seed germination, and product stability studies. With six-tier shelving, uniform airflow, and the advanced IntellusUltra™ Controller, the I-66NL ensures precise environmental control for reproducible results.
Features
Non-lighted chamber, ideal for dark-sensitive experiments
Six-tier shelving with twelve shelves total, maximizing work area
Wide temperature range with ±0.5°C stability
Advanced IntellusUltra™ controller with monitoring, alarms, and multi-program functionality
Serviceable, self-contained refrigeration system designed for extended reliability
IntellusUltra™ Controller
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24-hour chamber monitoring and control of temperature, lighting, humidity, and CO₂ (optional)
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Step & Ramp programming with 500 total program steps across 50 programs
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16 programmable light/event outputs
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Four modes: Manual, Diurnal, Program, Non-Circadian
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Daytime and nighttime temperature offsets
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On-board diagnostics, ambient monitoring, and power failure event logging
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Audible and visual alarms
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Dual experiment protection (primary and independent secondary limits)
Core Technical HighLights
Lighting System
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No lights contained inside the chamber
Capacity & Shelving
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Interior volume: 62.4 cu ft
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Work area: 64.7 sq ft
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Growing height per tier: 8”
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Shelving: Six tiers, twelve shelves
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Shelf dimensions: 27” D × 28.8” W
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Shelves adjustable in ½” vertical increments
Cabinet Construction
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Interior: 22-gauge electro-zinc plated steel
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Exterior: 18-gauge electro-zinc plated steel
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Welded seams on inner and outer shells
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Inner liner isolated using non-compressing, non-thermal conducting material
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Chamber is fully self-contained with 2” wall thickness
Airflow & Circulation
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Uniform airflow via rear wall air diffusers
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Chamber floor: stainless steel with drain and hose assembly
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Caster assembly with adjustable leveling legs
Doors & Access
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Two full-height doors: 29.1” W × 57.5” H
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Magnetic gaskets for airtight seal
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1.25” airtight access port on right-hand wall
Insulation & Finish
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Woodless, CFC-free insulation, 2” thick
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Interior and exterior: highly reflective, high-temperature white powder coating
Refrigeration System
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Self-contained air-cooled condensing unit
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Hot gas bypass system for continuous compressor operation and precise temperature control
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Top-mounted for easy maintenance
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Ceiling-mounted evaporator with three air circulation fans
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Heat rejection: 3206 BTU/hr
Temperature Safety
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Adjustable high and low temperature limits
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Audible and visual alarms
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Automatic power shutdown if limits exceeded
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Automatic system reset once temperature returns to normal
Typical Applications
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Drosophila culturing and population studies
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Rearing and holding of test organisms
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Bioassays
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Seed germination research
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Product and material stability testing
The I-66NL Biological Incubator is ideal for experiments requiring dark conditions, consistent airflow, and high-density multi-tier organization.
Options
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Additive humidity control with sensor
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Dehumidifier with sensor
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CO₂ enrichment package
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IntellusUltra™ Connect (remote monitoring)
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Android-based touchscreen interface
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Self-contained water-cooled condensing unit
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Dry alarm contacts
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Optional electrical receptacles
Contact us for custom configurations to match your research workflow.
Expert Guidance You Won’t Get From Big Distributors
Unlike broad catalog sellers, we specialize in controlled environment systems with deep application support. Our team understands the experimental nuances: from controller programming to lighting strategies and environmental uniformity. We help you match chamber options to your research goals and ensure you get the right system.
Ready to refine your setup or get a tailored quote? Contact us for expert support and configuration advice.








