Introduction
A thermostatic refrigerated bath is a laboratory instrument that maintains a liquid, usually water, at a precise, constant temperature, with the ability to cool below ambient temperature as well as to heat, and it is used for incubation, reactions, and temperature control at low and controlled temperatures in biology, chemistry, clinical, and pharmaceutical laboratories. The thermostatic refrigerated bath consists of an insulated tank, a refrigeration system with a compressor that cools the liquid, a heating element, a temperature controller, a stirrer or circulation system to ensure temperature uniformity, and a digital display; it maintains the set temperature over a range that extends below ambient, typically from about -30 degrees Celsius to above ambient, up to 100 degrees Celsius or higher, with high accuracy and stability, and the samples, in tubes, flasks, or other containers, are placed in the bath or in racks, and the bath provides a uniform temperature environment, and it is used for applications that require temperatures below ambient, such as cooling reactions, maintaining samples at low temperatures, and performing low-temperature procedures. Thermostatic refrigerated baths are used for cooling and maintaining samples and reactions at low temperatures, for incubation at controlled temperatures, for viscosity measurements, for calibrating thermometers and sensors at low temperatures, for freeze-thaw procedures, for sample storage, and for many other applications, and they are available in various sizes and temperature ranges, with features such as precise temperature control, digital displays, and overtemperature protection. With their cooling and heating capability, thermostatic refrigerated baths are essential instruments for temperature-controlled work at low and controlled temperatures.
Thermostatic Refrigerated Bath LTRB-T2014
Thermostatic Refrigerated Bath has a 20L capacity and operates within a temperature range of RT +5 to 100℃. It is equipped with advanced a microprocessor-based intelligent control syste...
Thermostatic Refrigerated Bath LTRB-T2011
Thermostatic Refrigerated Bath offers a capacity of 15 interface for users to navigate operational parameters. This baths and circulators is designed to meet the rigorous requirements of...
Thermostatic Refrigerated Bath LTRB-T2010
Thermostatic Refrigerated Bath offers a temperature range with an ambient +8 to 100°C, making it versatile and suitable for various control procedures. It is integrated with a pump with...
Thermostatic Refrigerated Bath LTRB-T2012
Thermostatic Refrigerated Bath provides 30 refrigeration system, ensuring efficient and environmentally friendly cooling. This baths and circulators is designed to meet the rigorous requ...
Thermostatic Refrigerated Bath LTRB-T2013
Thermostatic Refrigerated Bath features a spacious 30 L chamber with a removable lid for easy access to the interior. Provides accurate temperature control, allowing users to maintain sp...
Standards
ASTM E2488-09(2014)-Standard Guide for the Preparation and Evaluation of Liquid Baths Used for Temperature Calibration by Comparison
Complies with the above standards, but is not limited to them.
Features
1. Thermostatic refrigerated bath for precise temperature control below ambient to above ambient.
2. Combined heating and cooling for wide temperature range (typically -20 to 100 degrees C).
3. Suitable for chemical, biological, pharmaceutical, material, industrial and research labs.
4. Includes bath chamber, heater, refrigeration compressor, circulation pump, controller and manual.
5. Supports precise temperature control for reactions, viscosity testing and material conditioning.
FAQ
Q1: What testing scenarios is this bath mainly applied to?
A: The thermostatic refrigerated bath is used in chemical laboratories, biological research, pharmaceutical development, materials science, industrial quality control, food testing and research to provide precise temperature control over a wide range (typically -20 to 100 degrees C, or wider depending on model) using combined heating and refrigeration with circulation, for applications requiring temperatures below ambient (cooling) or precise control across a wide temperature range. It supports chemical reaction temperature control (low-temperature reactions at 0 to -20 degrees C, e.g., Grignard, lithiation, polymerization; elevated temperature reactions), viscosity measurement at controlled temperature (viscosity is highly temperature-dependent - measure at precise temperatures per standard, e.g., 40 degrees C for oils, 20 degrees C for many liquids), material testing and conditioning (thermal cycling, low-temperature brittleness, temperature-dependent property testing), pharmaceutical formulation and stability testing, biological sample incubation/cooling (enzyme reactions, protein studies, cell culture), food testing (gelatin, fat melting/crystallization, texture at temperature), and general laboratory temperature control where both heating and cooling are needed. The combined heating/refrigeration with circulation provides precise, uniform temperature control across a wide range, eliminating the need for separate water baths and cooling baths.
Q2: What standards does the bath comply with?
A: The thermostatic refrigerated bath complies with relevant IEC 61010 laboratory electrical safety standards, IEC 61326 EMC standards, and applicable GB/T standards for laboratory temperature control equipment. The hardware complies with applicable safety standards for refrigeration equipment and heated/cooled fluids. Temperature accuracy should be verified with a calibrated reference thermometer for critical applications. For pharmaceutical/industrial use, follow applicable GMP/GLP and data integrity requirements. The refrigeration system should use appropriate refrigerant (check environmental regulations - some refrigerants are regulated under Montreal Protocol/Kigali Amendment). Users should verify compliance with specific facility requirements (ventilation for refrigerant, noise).
Q3: What is the warranty period for the whole bath and key components?
A: The whole thermostatic refrigerated bath is covered by a 12-month warranty. The bath chamber, heating element, refrigeration compressor, circulation pump, controller and housing are covered, while gaskets, filters and fuses are consumables or accessories. Damage from improper use, running without fluid, refrigerant leak, compressor failure or unauthorized repair is excluded. Extended service contracts may be available for this laboratory equipment. Compressor and refrigeration system may have separate warranty terms (typically 1-5 years depending on manufacturer).
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires trained laboratory personnel familiar with temperature control equipment, refrigeration systems and fluid selection. We provide operation manuals, training and application support. Proper fluid selection (water, water/glycol mixture, silicone oil - based on temperature range), fluid level maintenance, temperature setting (both heating and cooling setpoints), circulation pump operation, routine maintenance (condenser cleaning, filter replacement, fluid replacement), and safety procedures (low-temperature burns from cold fluid, high-temperature burns from hot fluid, refrigerant safety) are important for effective, safe operation.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Temperature calibration against a reference thermometer recommended every 6-12 months for critical applications. Temperature uniformity verification periodically (measure at multiple locations). Refrigeration system performance checked (cooling rate, low-temperature capability). Routine maintenance: condenser coil cleaning (dust buildup reduces efficiency), air filter replacement, fluid inspection/replacement, circulation pump maintenance. Full system performance verification annually. Controller accuracy and over/under-temperature safety verified.
Q7: Are supporting consumables universal?
A: Heat transfer fluid (water for above-ambient, water/ethylene glycol or water/propylene glycol mixture for below-ambient down to ~-20 degrees C, silicone oil for wider/higher temperature ranges), gaskets, filters, cleaning supplies and fuses are available from laboratory/chemical suppliers. Long-term consumable cost includes fluid replacement (depends on usage and temperature - glycol mixtures can degrade over time, especially at higher temperatures; replace fluid every 6-12 months or when degraded). Use only fluid rated for the bath temperature range (fluid freezing point should be at least 10 degrees C below the minimum operating temperature to prevent freezing/slushing).
Q8: Can I customize parameters or supporting accessories?
A: Customization includes bath capacity (volume), temperature range (e.g., -20 to 100 degrees C, -30 to 150 degrees C, -40 to 200 degrees C - wider ranges require more powerful refrigeration and appropriate fluid), temperature uniformity, control type (analog, digital, programmable), circulation pump (pressure/flow rate), refrigeration type (single-stage compressor for -20 degrees C, cascade for -40 degrees C and below), data logging, connectivity, over/under-temperature protection and accessories. Additional pumps, external circulation coils and accessories can be ordered separately. Custom orders extend delivery lead-time significantly, especially for wide temperature range or low-temperature models.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes the thermostatic refrigerated bath and accessories with an operation manual. On-site installation, calibration and training are not included for standard orders but can be arranged at additional cost (recommended for low-temperature or wide-range models). Remote guidance is provided.
Q10: What types of samples are compatible with this equipment?
A: The thermostatic refrigerated bath heats and/or cools samples in test tubes, flasks, beakers, viscometers, cells and other heat/cold-resistant containers within the bath capacity, temperature range and fluid specification. Different temperature ranges require specific fluids: above 5 degrees C to 100 degrees C - use water (add biocide to prevent algae/bacterial growth for long-term use); 0 to -20 degrees C - use water/ethylene glycol or water/propylene glycol mixture (typically 50/50 for -20 degrees C, check freezing point of mixture); below -20 degrees C - use higher glycol concentration or specialized fluids (silicone oil, fluorinated fluids - check fluid compatibility with bath seals and tubing); above 100 degrees C - use silicone oil or mineral oil (similar to oil bath). The fluid freezing point must be below the minimum operating temperature (fluid slushing or freezing reduces circulation and can damage the pump). Users should select appropriate fluid for the temperature range (check fluid freezing point, maximum use temperature, viscosity at operating temperature, toxicity, compatibility with bath seals/gaskets/tubing - some fluids can attack certain seal materials), maintain proper fluid level (do not let fluid level drop below the heating element or pump intake - can cause element burnout, pump cavitation, or compressor short-cycling; check level regularly, especially at high temperatures where evaporation occurs), set appropriate temperature (do not exceed fluid maximum use temperature or bath rating; do not go below fluid freezing point), use proper containers for the temperature (borosilicate glass for general use, but avoid thermal shock - do not place cold glassware in hot fluid or vice versa; use plastic containers only if rated for the temperature range), follow proper safety for both hot and cold fluid (hot fluid causes burns; cold fluid below 0 degrees C can cause cold burns/frostbite - use appropriate PPE: heat-resistant gloves for hot, cryogenic/insulated gloves for cold), maintain the refrigeration system (clean condenser coils regularly - dust buildup reduces cooling efficiency and can cause compressor overheating; ensure proper airflow around the condenser - do not block vents; check refrigerant level if cooling performance degrades - refrigerant leak requires professional service), replace fluid when degraded (glycol mixtures can become acidic, discolored, or grow biological contamination over time - check pH and appearance; replace every 6-12 months or per manufacturer; dispose of used glycol/oil per hazardous waste regulations), use the circulation pump for external applications (the bath can circulate fluid to an external jacketed vessel or viscometer - use proper tubing rated for temperature and pressure), and for precise temperature applications (viscosity measurement, calibration), verify temperature uniformity and stability with a calibrated reference thermometer (the bath controller display is not a substitute for calibrated measurement at the sample location). The bath should be placed on a stable, level surface with proper clearance for ventilation (refrigeration condenser needs airflow - do not place against wall or near heat sources). The bath should not be operated in an enclosed space without ventilation (refrigerant leak can displace oxygen, though modern refrigerants are generally non-toxic - still ensure proper ventilation). For low-temperature operation below 0 degrees C, expect condensation or frost on the bath exterior and lid (this is normal - wipe periodically, ensure proper drainage if condensation is significant; use a lid to reduce condensation and frost buildup). The bath should have proper over/under-temperature protection (safety thermostat that cuts power at high temperature, and low-temperature protection to prevent fluid freezing - verify these are functional). For long-duration low-temperature operation, monitor fluid condition (glycol can absorb water from air, lowering freezing point - check fluid freezing point periodically if operating near the fluid minimum temperature). Waste (used fluid, cleaning solvents) should be disposed of per applicable regulations (ethylene glycol is toxic - do not pour down drain; propylene glycol is less toxic but still requires proper disposal; silicone oil may be classified as hazardous waste depending on local regulations).
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