When paraffin ribbons hit the water and start bunching and folding, every second counts — and imprecise temperature makes it worse. The LW Scientific ReadyWarm Tissue Flotation Bath (FWL-TISS-BTH3) eliminates that variability with a touchscreen PID controller that holds the bath to within fractions of a degree. The LED-lighted, black Teflon-coated interior delivers high contrast so you can see and position every ribbon precisely before mounting — and the compact footprint fits even the most crowded histopathology bench.Specifications Specification Detail Touchscreen PID temperature control precise digital setpoint management eliminates guesswork and temperature drift during batch processing LED-illuminated black Teflon (PTFE) interior high visual contrast between the dark basin and translucent tissue ribbons makes positioning fast and accurate Celsius and Fahrenheit display switch between units at a glance to accommodate any protocol or international SOP Uniform heat distribution no hot spots or cool zones that cause uneven paraffin relaxation or distorted sections Compact benchtop footprint fits on crowded histopathology workstations without displacing other equipment Universal 90–240 VAC power adapter ready for use in any country without voltage conversion hardware Designed and assembled in Atlanta, Georgia, USA built under ISO 13485:2016 medical device quality management standards Compare the Slide & Fluid Warming Family Model Type Format SWL-14PL-77DP Digital slide warmer 14-slide flatbed FWL-04PL-BTD3 ReadyWarm table warmer 66-slide flatbed FWL-04PL-WAL3 ReadyWarm wall fluid warmer Wall-mount, IV bag shelves FWL-TISS-BTH3 (this model) Tissue flotation bath Lighted, touchscreen Digital PID control; SWL/FWL warmers Made in USA. Frequently Asked Questions What is the temperature range of the FWL-TISS-BTH3, and how accurate is it? The ReadyWarm Tissue Flotation Bath uses a digital PID touchscreen controller to maintain precise setpoint temperatures suited for paraffin flotation — typically 40–50°C. PID control prevents temperature overshoot and drift, keeping the water stable throughout extended batch processing sessions. What is the benefit of the black Teflon-coated interior? The dark, corrosion-resistant PTFE coating provides strong visual contrast against translucent paraffin ribbons floating on the water surface. This makes it significantly easier to see each section and position it precisely onto a slide, reducing errors and increasing throughput. Can distilled or deionized water be used in this bath? Yes — distilled or deionized water is recommended to minimize mineral buildup on the Teflon interior. Some protocols also add a small amount of albumin solution or similar adhesive to improve section adhesion to slides. Is the FWL-TISS-BTH3 compatible with international electrical standards? The included universal 90–240 VAC adapter allows the unit to be used with standard wall outlets worldwide without a separate voltage converter, making it suitable for international labs and research facilities. {"@context": "https://schema.org/", "@type": "Product", "name": "LW Scientific Tissue Flotation Bath - FWL-TISS-BTH3 | Lighted Touchscreen PID Control", "sku": "FWL-TISS-BTH3", "brand": {"@type": "Brand", "name": "LW Scientific"}, "description": "Lighted touchscreen tissue flotation bath for histology. Black Teflon interior, PID control, USA-made. SKU FWL-TISS-BTH3. Ships from USA."} {"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What is the temperature range of the FWL-TISS-BTH3, and how accurate is it?", "acceptedAnswer": {"@type": "Answer", "text": "The ReadyWarm Tissue Flotation Bath uses a digital PID touchscreen controller to maintain precise setpoint temperatures suited for paraffin flotation — typically 40–50°C. PID control prevents temperature overshoot and drift, keeping the water stable throughout extended batch processing sessions."}}, {"@type": "Question", "name": "What is the benefit of the black Teflon-coated interior?", "acceptedAnswer": {"@type": "Answer", "text": "The dark, corrosion-resistant PTFE coating provides strong visual contrast against translucent paraffin ribbons floating on the water surface. 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