Truelab DZKW-D-1 Digital Display Economical Water Bath

Overview

The Truelab DZKW-D-1 Digital Display Economical Water Bath is a precision-engineered constant-temperature immersion system designed for routine laboratory thermal conditioning of samples, reagents, and containers. Operating on resistive heating principles with PID-based digital temperature control, this unit maintains stable thermal environments across its operational range of ambient +10°C to 100°C—suitable for enzymatic reactions, sample warming, media preparation, and dissolution testing. Its compact single-well configuration (160 × 170 × 90 mm internal dimensions) supports standard glassware including test tubes, beakers, and flasks up to 500 mL capacity. The bath employs a stainless steel tank and lid for corrosion resistance and long-term durability in aqueous and mildly aggressive chemical environments, while the electrostatically coated outer housing ensures mechanical robustness and ease of cleaning.

Key Features

• Digital LED display with intuitive push-button interface for real-time temperature setpoint and actual bath temperature readout
• PID temperature controller delivering ≤ ±1°C temperature uniformity and ≤ ±1°C fluctuation under steady-state conditions
• Stainless steel inner tank and lid—non-porous, non-reactive, and compliant with ISO 8573-1 cleanliness requirements for general lab use
• Electrostatically sprayed powder-coated exterior finish for abrasion resistance and chemical splash protection
• Over-temperature safety cutoff to prevent dry-run damage and ensure operator safety per IEC 61010-1 Class II requirements
• Integrated water-level sensor (optional upgrade available) to prevent heater activation below minimum fill line
• Front-panel accessible fuse holder and grounded three-pin power input meeting CE and RoHS directives

Sample Compatibility & Compliance

The DZKW-D-1 accommodates common laboratory vessels including borosilicate glass test tubes (10–25 mm diameter), 50–500 mL beakers, and low-profile crystallization dishes. It is suitable for aqueous solutions, buffered saline, glycerol-water mixtures, and ethanol/water blends within its thermal limits. While not certified for sterile or GMP-critical applications, the unit meets general-purpose laboratory standards under ISO/IEC 17025 supporting laboratories performing method validation per ASTM E2500 and USP . Its construction and performance align with GLP documentation expectations for equipment qualification (IQ/OQ) when used in non-regulated research, teaching, and QC screening workflows.

Software & Data Management

This model operates as a standalone analog-digital hybrid instrument without embedded firmware logging or PC connectivity. All operational parameters—including setpoint, actual temperature, and elapsed time—are viewable on the front-panel display but are not timestamped or exportable. For labs requiring audit trails or electronic records, optional external data loggers (e.g., Omega OM-DAQPRO-5300 series) may be interfaced via the analog 0–5 V output (available upon request). When deployed in regulated environments, users must implement manual logbook entries or integrate the unit into validated SOPs referencing temperature verification at start, midpoint, and endpoint of each run—consistent with FDA 21 CFR Part 11 guidance for paper-based record retention.

Applications

• Pre-warming of culture media, blood products, and diagnostic reagents prior to assay initiation
• Controlled thawing of frozen biological samples to minimize thermal shock
• Constant-temperature incubation of enzyme kinetics assays and immunoassay plates
• Evaporation control during solvent removal from extracts and concentrates
• Dissolution rate studies of pharmaceutical tablets using USP Apparatus I/II-compatible sample holders
• Calibration support for thermometers, RTDs, and thermocouples against NIST-traceable references
• Teaching laboratories for fundamental heat transfer experiments and Arrhenius equation demonstrations

FAQ

What is the minimum recommended water level for safe operation?
Maintain water level ≥10 mm above the heater element (typically 30–40 mm depth). Operation below this threshold risks overheating and permanent damage.
Can this unit be used for oil baths?
No. The DZKW-D-1 is rated exclusively for aqueous and water-miscible fluids. Use of oils or organic solvents voids warranty and violates IEC 61010-1 flammability safety provisions.
Is calibration certificate included with shipment?
A factory-as-tested temperature verification report is provided; full UKAS/NIST-traceable calibration requires third-party service and is not bundled.
Does the unit support external temperature probes?
Not by default. An optional PT100 probe port can be added during order configuration for remote monitoring—contact technical sales for part number and lead time.
How often should the stainless steel tank be descaled?
In hard-water areas, perform weekly citric acid descaling (5% w/v, 60°C, 30 min soak); in soft-water regions, monthly maintenance suffices. Always rinse thoroughly before reuse.