Percival Scientific Low Temperature Constant Defrost Chamber Model LT‑41VL
Precision Low-Temperature Research with Full Shelf Visibility
The LT‑41VL is designed for studies that require low-temperature control under full lighting without defrost-induced spikes. Ideal for cold hardiness, freeze tolerance, heat stress testing, and seasonal simulation experiments, this chamber features externally mounted LEDs behind heated glass side walls, providing full visibility of each shelf while eliminating condensation and avoiding disturbances to ongoing experiments.
Features
IntellusUltra® Controller: Android-based touchscreen enables 24/7 monitoring and control of temperature, lighting, humidity, and CO₂ (optional). Offers step/ramp programming, deviation alarms, and full experiment logging.
Lighting System: Two externally mounted SciWhite LED lamp banks, enhanced with red, programmable up to 515 μmoles/m²/s at 6″, dimmable 10–100%. Lamp banks swing like doors for maintenance without disrupting experiments.
Glass Side Walls: Evenly heated to eliminate condensation and allow unobstructed viewing of plants.
Airflow & Circulation: Uniform, natural upward airflow across shelves.
Refrigeration & Defrost: Dual-coil system with hot gas bypass ensures constant low temperature even under full lighting, avoiding spikes during defrost cycles. Optional water-cooled or outdoor air-cooled condensing units available.
Experiment Protection: Adjustable high/low temperature limits with audible and visual alarms; automatic reset when conditions return to normal.
Durable Construction: Interior of 22-gauge electro-zinc steel, exterior 18-gauge steel, polished stainless-steel floor with drain. Casters and leveling legs included.
Core Technical Highlights
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Exterior Dimensions: 46.3″W × 33.6″D × 79.9″H (requires 6″ clearance on right)
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Interior Space: 37.2 cu ft
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Work Area: 13.6 sq ft
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Growing Height: 21.5″ (two shelves) or 43.8″ (one shelf)
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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: 515 μmoles/m²/s at 6″ from LED tiles
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Shelving: Two tiers of white epoxy-coated wire shelves (27″D × 36.3″W), adjustable in ½″ increments
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Insulation: 2″ thick CFC-free foam, woodless construction
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Refrigerant: R-449a, dual-coil constant temperature defrost
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Heat Rejection: 3,780 BTU/hr
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Doors & Ports: Single full-access door 36.8″ × 57.5″; one 1.25″ access port with airtight plug
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Finish: High-reflectivity, powder-coated environmentally friendly paint
Typical Applications
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Cold hardiness and freeze tolerance testing
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Heat stress and environmental simulations
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Seasonal temperature studies (spring, summer, fall, winter)
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Experiments requiring full visibility and undisturbed lighting control
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.
