Percival Scientific Low Temperature Constant Defrost Chamber Model LT‑105
Precision Low-Temperature Control for Plant and Environmental Research
The LT‑105 is designed for experiments requiring extreme cold and controlled lighting conditions, including cold hardiness testing, freeze tolerance, heat stress studies, and seasonal temperature simulations. Its constant temperature defrost system allows the chamber to operate at low temperatures under full lighting without defrost-induced temperature spikes, ensuring reliable and repeatable experimental conditions.
Features
IntellusUltra® Controller: Android-based touchscreen provides 24/7 monitoring and control of temperature, lighting, humidity, and CO₂ (optional). Offers step/ramp programming, deviation alarms, and experiment logging.
Lighting System: One tier of SciWhite LEDs enhanced with red, programmable up to 1,450 μmoles/m²/s at 6″, dimmable 10–100%, with vertically adjustable lamp bank.
Airflow & Circulation: Conditioned air moves uniformly upward through the workbench via perforated aluminum channels. Fresh air inlet and outlet are adjustable.
Refrigeration & Defrost: Dual-coil system with hot gas bypass ensures constant low temperature during full lighting without defrost spikes. Optional water-cooled or outdoor all-weather air-cooled units available.
Durable Construction: Interior made of 22-gauge stainless steel with perforated aluminum workbench; exterior is 24-gauge Galvannealed steel. Casters and leveling legs included; chamber floor with drain and tubing.
Experiment Protection: Adjustable high and low temperature controls with audible and visual alarms. Automatic reset when conditions return to safe range.
Convenience: Two large doors (26″ × 48.5″) and two 1.25″ access ports for instrumentation or sensors.
Core Technical Highlights
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Exterior Dimensions: 117.3″W × 38.8″D × 78.8″H (requires 6″ clearance on right side)
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Interior Space: 122.9 cu ft
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Work Area: 16 sq ft per tier
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Growing Height: 56″ per tier
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Temperature Range: -10° to 44 °C lights ON (±0.5 °C), -15° to 44 °C lights OFF (±0.5 °C)
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Light Intensity: 1,450 μmoles/m²/s at 6″ from LED tiles
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Shelving: One tier of perforated aluminum channels, vertically adjustable
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Insulation: 2″ thick foamed-in-place CFC-free urethane, environmentally friendly (GWP 0.0, ODP 0.0)
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Refrigerant: R-449a (with dual-coil constant temperature defrost)
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Heat Rejection to Ambient: 6,953 BTU/hr
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Construction: 22-gauge stainless steel floor, 24-gauge Galvannealed steel exterior, high-reflectivity powder-coated finish
Typical Applications
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Cold hardiness and freeze tolerance studies
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Seasonal temperature simulation (spring, summer, fall, winter)
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Heat stress testing
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Experiments requiring low-temperature lighting without defrost spikes
Optional Upgrades
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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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Dimmable or LED Lighting Upgrades
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IntellusUltra Connect
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Android-Based Touchscreen
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Self-Contained Water-Cooled Condensing Unit
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Dry Alarm Contacts
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Additional 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.
