Julabo PURA 30 Universal Water Bath

Overview

The Julabo PURA 30 Universal Water Bath is a precision-engineered, laboratory-grade temperature control system designed for consistent thermal stabilization of samples in aqueous or compatible liquid media. Based on Julabo’s proven Peltier-assisted heating architecture and high-stability PID temperature regulation, the PURA 30 delivers reliable thermal performance across a wide operational range—from near-ambient (+5 °C) up to boiling-point conditions (+99.9 °C). Its robust stainless-steel bath chamber, integrated dry-run protection, and sloped bath rim—designed to return condensate from the lid into the bath—ensure long-term operational integrity and user safety. As a direct evolution of Julabo’s TW-series water baths, the PURA platform incorporates enhanced thermal uniformity, intuitive LED interface operation, and modular accessory compatibility without requiring routine maintenance over its service life.

Key Features

• High-precision temperature control with ±0.15 °C stability at setpoint, verified per ISO 17025-compliant calibration protocols
• Wide operating range: +5 °C to +99.9 °C, enabling applications from low-temperature incubation to accelerated hydrolysis studies
• Adjustable bath volume capacity (4.8–36 L) via interchangeable inserts or depth-adjustable platforms; full immersion platform included and removable
• 2 kW heating power with rapid thermal response and minimal overshoot, optimized for both small-volume precision assays and large-batch sample conditioning
• IP21-rated front panel with sealed membrane switches and waterproof LED display (0.1 °C resolution), suitable for humid lab environments
• Integrated dry-run protection and over-temperature cut-off circuitry compliant with IEC 61010-1 safety standards
• Ergonomic bath geometry featuring a tapered rim to redirect condensation—reducing evaporation loss and minimizing contamination risk during extended use
• Standard drain outlet (except PURA 4 model) for controlled fluid exchange and cleaning procedures

Sample Compatibility & Compliance

The PURA 30 accommodates a broad spectrum of sample containers—including glass vials, plastic tubes (up to 7 standard racks), cuvettes, and custom vessels—within its 77 × 27 cm bath opening and 18 cm depth. Its chemically inert stainless-steel bath and optional corrosion-resistant accessories support use with mildly aggressive media (e.g., buffered saline, ethanol/water mixtures, and diluted acids/bases), though prolonged exposure to strong oxidizers or halogenated solvents is not recommended. The unit meets CE marking requirements under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. It supports GLP/GMP-aligned workflows through traceable temperature logging (when paired with Julabo’s optional software interface) and configurable alarm thresholds for audit-ready documentation.

Software & Data Management

While the PURA 30 operates as a standalone instrument with local setpoint control, it is compatible with Julabo’s optional LabSoft PC software via RS232 or USB interface. This enables real-time temperature monitoring, time-stamped data export (CSV format), remote parameter adjustment, and event-triggered alarms. When deployed in regulated environments—such as pharmaceutical QC labs or clinical testing facilities—the system supports 21 CFR Part 11-compliant configurations when used with validated software modules and appropriate access controls. All internal temperature logs retain timestamps and operator IDs where configured, facilitating compliance with ISO/IEC 17025 Clause 7.7 (result reporting) and ASTM E2500-13 (verification of equipment performance).

Applications

• Biological sample equilibration prior to enzymatic assays, DNA hybridization, or cell culture passaging
• Thermal conditioning of polymer solutions and viscoelastic materials for rheological pre-treatment
• Accelerated stability testing of pharmaceutical formulations under ICH Q1A(R3) guidelines
• Food microbiology: temperature-controlled enrichment steps for pathogen detection (e.g., ISO 6579, AOAC 990.12)
• Dental material testing per ISO 4049 (resin-based composites) and ISO 10477 (cement setting behavior)
• Environmental sample digestion protocols requiring precise ramp-and-hold thermal profiles
• Calibration of thermometers, RTDs, and thermocouples against NIST-traceable references

FAQ

What is the minimum and maximum bath fill volume for optimal thermal stability?
The PURA 30 achieves rated stability (±0.15 °C) when filled between 4.8 L (minimum functional level) and 36 L (maximum nominal capacity). For best uniformity, maintain liquid depth ≥12 cm above the heater element.
Can the PURA 30 be used for circulating applications?
No—the PURA series is a static (non-circulating) water bath. For forced-convection applications, Julabo recommends the F25 or SLT series circulators.
Is the unit compatible with external temperature probes for independent verification?
Yes—its RS232 port supports integration with third-party dataloggers or validation systems using standard Modbus RTU or ASCII command sets.
Does the PURA 30 meet FDA requirements for use in pharmaceutical manufacturing?
The hardware complies with applicable electrical and mechanical safety standards (IEC 61010-1); formal qualification (IQ/OQ/PQ) must be performed per site-specific SOPs and Annex 11 expectations.
What accessories are supplied as standard?
The PURA 30 ships with a removable full-immersion platform, waterproof keypad, LED display, and audible/visual alarm system. Optional accessories include transparent acrylic lids, stainless-steel multi-hole covers, cooling rings, tube racks, and bath protection fluids.