CZGY HH-TT-20L Digital Programmable Lifting Oil Bath Circulator (Heating-Only, Non-Circulating)

Overview

The CZGY HH-TT-20L is a digitally controlled, vertically adjustable oil bath heater engineered for precise, stable thermal conditioning of samples in laboratory environments where immersion heating—without forced circulation—is required. Unlike recirculating baths, this unit operates as a static-heating bath, relying on natural convection and high-power resistive heating elements to maintain uniform temperature distribution within the stainless-steel chamber. Its operational range spans from ambient +10 °C up to 300 °C, making it suitable for high-temperature applications such as solvent evaporation, wax melting, polymer preheating, and thermal stability testing of heat-sensitive reagents. The integrated lifting mechanism enables ergonomic sample insertion and retrieval—critical when handling hot oil media or bulky glassware—while minimizing operator exposure to thermal hazards. Constructed with a 304 stainless-steel inner tank and cold-rolled steel exterior with epoxy powder coating, the HH-TT-20L ensures long-term corrosion resistance against oils, organic solvents, and humid laboratory atmospheres.

Key Features

• Digital PID temperature controller with LCD display for real-time monitoring and setpoint adjustment at 0.1 °C resolution
• Vertical lifting platform with mechanical lock and smooth height adjustment (range: 0–200 mm), enabling safe access to submerged vessels without tilting or manual lifting
• High-power 4500 W heating system optimized for rapid thermal ramping and recovery after sample loading
• Stainless-steel (AISI 304) bath chamber (Ø40 cm × 40 cm depth) designed for compatibility with silicone oil, mineral oil, and other high-boiling-point heat transfer fluids
• Over-temperature protection circuit with independent safety thermostat (cut-off at 320 °C) compliant with IEC 61010-1 Class II requirements
• Programmable timer supporting dual-mode operation: minutes (0–9999) or hours (0–999), with auto-shutdown functionality
• Front-panel keypad interface with tactile feedback; no external software or PC connection required for basic operation

Sample Compatibility & Compliance

The HH-TT-20L accommodates standard laboratory glassware including round-bottom flasks (up to 5 L), beakers, test tubes, and reaction vessels immersed directly in heated oil. Its non-circulating design avoids shear-induced degradation of thermally labile biomolecules or viscous polymer melts. While not certified for GLP/GMP production environments, the unit meets general-purpose laboratory safety standards per IEC 61010-1 (2010) for electrical equipment used in measurement, control, and laboratory use. Temperature accuracy (±1 °C) and stability are verified per ASTM E220–22 Annex A1 (Standard Test Method for Calibration of Thermocouples by Comparison Techniques) using traceable NIST-calibrated reference probes. No CE marking is affixed; users intending EU deployment must perform local risk assessment and conformity evaluation under Directive 2014/35/EU (Low Voltage Directive).

Software & Data Management

This model operates as a standalone instrument with no embedded data logging, USB connectivity, or remote control capability. All temperature settings, timer values, and status indicators are managed locally via the front-panel interface. For laboratories requiring audit trails or electronic records, integration with external data acquisition systems (e.g., LabVIEW, MATLAB, or third-party SCADA platforms) is possible via optional analog 0–5 V or 4–20 mA output modules (sold separately). The device does not support FDA 21 CFR Part 11-compliant user authentication, electronic signatures, or audit trail generation natively—these functions must be implemented at the facility level if required for regulated workflows.

Applications

• Controlled-temperature digestion of organic matrices prior to elemental analysis (e.g., EPA Method 3050B)
• Thermal conditioning of viscometry standards and calibration oils (ISO 2592, ASTM D92)
• Preheating of asphalt binders and bituminous materials for rheological testing (ASTM D7175, EN 13302)
• Accelerated aging studies of lubricants, adhesives, and encapsulants under elevated thermal stress
• Support heating for reflux condensation setups in synthetic organic chemistry
• Constant-temperature incubation of solid-phase extraction cartridges during elution steps

FAQ

Is the HH-TT-20L suitable for water bath applications?

Yes—though optimized for oils, it may be used with deionized water below 100 °C; however, prolonged use above 80 °C increases scaling and corrosion risk.
Does it include a built-in stirrer or circulation pump?

No—this is a static-heating bath with no mechanical agitation or fluid recirculation.
Can the lifting mechanism support heavy glassware loads?

The platform is rated for static loads up to 15 kg; dynamic loading during motion should remain below 8 kg for long-term mechanical integrity.
What is the recommended maintenance interval?

Inspect heating element terminals and gasket integrity every 6 months; clean oil residue from chamber walls after each high-temperature (>250 °C) run using lint-free cloths and isopropyl alcohol.
Is calibration documentation provided with shipment?

A factory verification report (non-NIST-traceable) is included; users requiring ISO/IEC 17025-accredited calibration must arrange third-party service.