WIGGENS Wtherm-5M Transparent Heating Bath Circulator

Overview

The WIGGENS Wtherm-5M Transparent Heating Bath Circulator is a precision-engineered laboratory thermal management system designed for stable, uniform temperature control in applications requiring external circulation or internal bath homogenization. Utilizing resistive heating via a high-grade stainless steel coil and advanced PID feedback control, the unit maintains setpoint accuracy within ±0.05 °C across its full operational range of +5 °C to +95 °C — suitable for both aqueous and low-viscosity oil-based media. Its transparent acrylic bath chamber enables real-time visual monitoring of sample immersion, stirrer operation, and fluid level integrity without compromising thermal performance or safety. Engineered for continuous duty in QC labs, R&D environments, and academic teaching facilities, the Wtherm-5M delivers reproducible thermal conditioning while supporting ISO/IEC 17025-compliant calibration workflows and GLP-aligned experimental documentation.

Key Features

• High-visibility transparent acrylic bath (5 L usable volume) with integrated stainless steel heating coil resistant to corrosion and scale formation
• PID-controlled temperature regulation ensuring ±0.05 °C stability at any point within the +5 °C to +95 °C range
• Dual-mode circulation system: configurable internal recirculation and external loop delivery (up to 10 L/min flow rate, 0.23 bar max pressure)
• Three-button intuitive interface with large LED display for rapid parameter entry and real-time status feedback
• Comprehensive safety architecture including overtemperature cut-off, low-level float sensor with audible/visual alarm and automatic heater deactivation
• Thermally optimized chassis design with ample ventilation space, enabling extended unattended operation without thermal throttling
• Selectable operating modes: standby, auto-start on power-up, and programmable ramp-hold profiles (via optional software integration)

Sample Compatibility & Compliance

The Wtherm-5M accommodates standard laboratory vessels up to Ø12 cm × 15 cm depth and supports immersion of probes, reactors, viscometers, and condenser jackets. Its chemical-resistant bath chamber and non-reactive heating element are compatible with deionized water, glycerol–water mixtures, silicone oils (up to 95 °C), and other non-aggressive heat-transfer fluids. The device conforms to IEC 61010-1:2010 for electrical safety in laboratory equipment and meets CE marking requirements under the EU Low Voltage and EMC Directives. While not intrinsically rated for hazardous locations, it is routinely deployed in environments adhering to ISO 14644-1 Class 8 cleanroom practices and supports audit readiness for FDA 21 CFR Part 11–aligned SOPs when paired with validated data logging systems.

Software & Data Management

The Wtherm-5M operates as a standalone instrument with local control; however, its analog output (0–10 V or 4–20 mA, configurable) and RS232 interface enable integration into centralized lab automation platforms (e.g., LabVIEW, DeltaV, or custom SCADA). When connected to compliant third-party software, users can log temperature traces with timestamped metadata, generate CSV reports for regulatory submission, and implement electronic signatures per ALCOA+ principles. Audit trail functionality — including operator ID, parameter changes, alarm events, and power cycle history — is supported through external data acquisition modules meeting GAMP 5 Category 3 validation standards.

Applications

• Calibration of thermometers, RTDs, and thermocouples against NIST-traceable references
• Temperature-dependent viscosity measurements using rotational or capillary viscometers
• Controlled-rate heating for polymer dissolution, enzyme kinetics, and reaction calorimetry
• Stabilization of spectrophotometer cuvette holders and HPLC column ovens
• Preconditioning of reference standards prior to gravimetric or titrimetric analysis
• Support of ASTM D2196 (rheology), ISO 2555 (solution viscosity), and USP compounding environment controls

FAQ

What is the maximum recommended fluid height for safe operation?
The bath must be filled to at least 2 cm above the heating coil (minimum 4.5 L for Wtherm-5M); operation below this level triggers immediate low-level shutdown.
Can the unit maintain temperature during external circulation through a 3-meter tubing loop?
Yes — with proper insulation and minimal elevation change, the 10 L/min pump sustains ≤±0.1 °C deviation at the remote outlet under steady-state conditions.
Is the acrylic bath chamber autoclavable or solvent-resistant?
No — the chamber is incompatible with autoclaving, chlorinated solvents, or strong oxidizers; ethanol and isopropanol cleaning is permitted.
Does the Wtherm-5M support remote programming via USB or Ethernet?
Not natively — communication is limited to RS232 and analog outputs; USB/Ethernet connectivity requires an external protocol converter.
What maintenance intervals are recommended for long-term reliability?
Biannual inspection of the float switch mechanism, annual descaling of the heating coil (using 5% citric acid solution), and verification of PID tuning parameters using a calibrated reference thermometer.