LAUDA Hydro H 8 General-Purpose Circulating Water Bath (25–100 °C, ±0.1 °C Stability)

Overview

The LAUDA Hydro H 8 is a precision-engineered, general-purpose circulating water bath designed for reliable thermal conditioning of samples in life science, clinical diagnostics, and analytical laboratories. Operating within a controlled temperature range of 25 °C to 100 °C, the unit achieves exceptional thermal uniformity and stability—±0.1 °C—through direct bottom-mounted heating beneath a stainless-steel perforated support plate. This configuration minimizes thermal gradients and eliminates localized hot spots, ensuring reproducible incubation, enzyme assays, sample thawing, and media preparation across diverse applications. Unlike passive water baths, the Hydro H 8 incorporates integrated circulation (non-pump-based convection-enhanced design), promoting homogeneous heat distribution without introducing mechanical vibration or requiring external tubing. Its robust construction—featuring a fully welded AISI 304 stainless-steel bath chamber, electrogalvanized and powder-coated steel housing, and corrosion-resistant internal components—ensures long-term durability under routine laboratory use and frequent cleaning protocols.

Key Features

• High-contrast 3.5-inch TFT display with intuitive menu navigation and 0.1 °C temperature resolution for precise setpoint control
• Dual-layer insulated stainless-steel bath cover with contoured inner surface to redirect condensate into the bath, preventing droplet contamination of samples and minimizing heat loss
• Integrated safety system: automatic heater cutoff with audible and visual alarm on low-water level, overtemperature (>105 °C), or deviation beyond ±2 °C from setpoint
• Three programmable timer functions: delay start, hold time after reaching setpoint, and total operation duration—configurable in minutes or hours
• Drain valve for rapid, spill-free bath emptying; supplied with perforated stainless-steel tray and cover as standard
• Optimized thermal architecture: heating element positioned directly beneath the support plate ensures rapid thermal equilibration and high repeatability across repeated cycles

Sample Compatibility & Compliance

The Hydro H 8 accommodates standard laboratory vessels—including test tubes (13–25 mm diameter), culture flasks, cuvettes, and multi-well plates—within its 200 × 245 mm opening and 115 mm usable depth. Its stainless-steel interior and removable tray facilitate easy decontamination and comply with routine lab hygiene standards. While not certified for GMP or ISO 13485 out-of-the-box, the device supports GLP-compliant workflows through its deterministic alarm logging (via visual/sound indicators), stable thermal performance traceable to NIST-traceable reference thermometers, and absence of software-based data storage that would require 21 CFR Part 11 validation. It meets IEC 61010-1:2010 safety requirements for laboratory electrical equipment and conforms to EMC directive 2014/30/EU.

Software & Data Management

The Hydro H 8 operates via embedded firmware with no external software dependency. All operational parameters—including set temperature, active timer mode, elapsed time, and alarm status—are displayed in real time on the TFT interface. No data export, remote control, or PC connectivity is provided; this design prioritizes operational simplicity, electromagnetic immunity, and regulatory transparency in regulated environments where unvalidated digital interfaces introduce audit complexity. For labs requiring electronic recordkeeping, external calibrated temperature loggers (e.g., compliant with ASTM E2850 or ISO/IEC 17025) may be deployed alongside the unit without interference.

Applications

• Enzyme kinetics and protein denaturation studies requiring tightly controlled thermal ramps and holds
• Pre-warming of reagents, agarose gels, and cell culture media prior to use
• Controlled thawing of cryopreserved biological samples (e.g., PBMCs, primary cells) at defined rates
• Standardization of viscosity measurements for QC/QA of liquid formulations (e.g., buffers, diluents)
• Incubation support for ELISA, PCR master mix preparation, and antibody labeling protocols
• Calibration reference environment for thermometer verification per ISO 17025 accredited procedures

FAQ

Does the Hydro H 8 include a circulation pump?
No—it relies on natural convection enhanced by optimized heater placement and bath geometry, eliminating maintenance-prone pumps while maintaining ±0.1 °C stability.
Can it operate continuously at 100 °C?
Yes; all Hydro series units are rated for sustained operation up to 100 °C, including near-boiling conditions, supported by redundant thermal cutoffs.
Is the bath compatible with organic solvents?
Not recommended; the unit is engineered exclusively for aqueous solutions. Contact with alcohols, acetone, or chlorinated solvents may compromise seals and surface passivation.
What is the minimum fill volume required for safe operation?
At least 3.8 L must be present to submerge the heater and trigger the low-level sensor; operating below this risks dry-fire damage and invalidates warranty coverage.
How is calibration performed?
Users perform periodic verification using a NIST-traceable reference thermometer immersed at the center of the bath, 25 mm above the bottom plate—per LAUDA’s documented procedure L-VER-HYDRO-01.