Titan HLC-0840E High-Low Temperature Circulating Bath

Overview

The Titan HLC-0840E is an integrated high-low temperature circulating bath engineered for precise thermal control in demanding laboratory and industrial applications. It employs a dual-mode refrigeration-heating system based on vapor-compression thermodynamics, combined with PID-controlled electric resistance heating, to achieve stable setpoint maintenance across a broad operational range of −40 °C to +100 °C. Unlike open-bath or immersion-style units, the HLC-0840E delivers closed-loop circulation via an internal reservoir and calibrated pump, enabling consistent thermal transfer to external devices such as spectrophotometer jackets, reactor jackets, calorimeters, or material testing fixtures. Its water-cooled condenser design ensures stable performance under ambient conditions where air-cooled units may suffer capacity derating—particularly critical in continuous-duty environments exceeding 25 °C ambient or in enclosed equipment rooms.

Key Features

• Integrated architecture with no external chiller or heater required—reduces footprint and simplifies installation
• High-precision temperature regulation with ±0.05 °C stability over time, verified per ASTM E742-22 (Standard Practice for Calibration of Liquid-in-Glass Thermometers)
• Dual-capacity thermal output: 600 W refrigeration at −40 °C (measured at 25 °C ambient, 20 °C inlet water), complemented by 2000 W resistive heating for rapid ramp-up and overshoot suppression
• Stainless-steel reservoir (8 L volume) with corrosion-resistant internal coating and level-sensing circuitry to prevent dry-run operation
• Adjustable circulation pump delivering up to 22 L/min flow at 0.3 bar discharge pressure, compatible with typical laboratory tubing (¼″–⅜″ OD) and pressure-rated heat exchangers
• Continuous-duty rated motor and compressor assembly, validated for 24/7 operation under nominal load per IEC 60034-1 insulation class F duty cycle specifications

Sample Compatibility & Compliance

The HLC-0840E is designed for indirect thermal conditioning only—fluids circulated must be compatible with stainless steel (304/316), EPDM seals, and copper-nickel heat exchanger surfaces. Common working fluids include 30–50% aqueous ethylene glycol solutions (for sub-zero operation), deionized water (for ≤100 °C use), or specialized silicone oils (with viscosity ≤50 cSt at operating temperature). The unit complies with CE marking requirements under the EU Machinery Directive 2006/42/EC and Low Voltage Directive 2014/35/EU. Electrical safety conforms to IEC 61010-1:2010 for laboratory equipment. While not certified for hazardous locations, its sealed refrigerant circuit (R-404A or R-507A, depending on production batch) meets ISO 5149-2:2014 requirements for hermetic system integrity and leak rate limits (<0.5 g/year).

Software & Data Management

The HLC-0840E features a built-in microprocessor controller with a 4.3″ TFT LCD interface supporting multi-point setpoint programming, ramp/soak profiles, and real-time display of bath temperature, outlet temperature, flow status, and fault codes. Optional RS-485 Modbus RTU communication enables integration into centralized lab monitoring systems (e.g., LabVantage, Siemens Desigo, or custom SCADA). When connected to a compliant data acquisition platform, audit trails—including operator ID (via optional RFID login), parameter changes, and alarm events—can be logged in accordance with FDA 21 CFR Part 11 requirements for electronic records and signatures, provided the host system implements appropriate access controls and electronic signature validation.

Applications

• Thermal stabilization of analytical instruments: UV-Vis spectrophotometers, FTIR cells, HPLC column ovens, and viscometers requiring tight bath temperature control
• Material science testing: DSC sample stage conditioning, tensile testing environmental chambers, and polymer crystallization studies
• Pharmaceutical QC/QA workflows: Dissolution apparatus jacketing per USP , stability chamber calibration verification, and excipient thermal behavior screening
• R&D process development: Jacketed glass reactors (≤5 L volume), photochemical reaction blocks, and electrochemical cell temperature management
• Calibration laboratories: As a reference thermal source for thermometer, RTD, and thermocouple calibration against NIST-traceable standards

FAQ

What refrigerant does the HLC-0840E use, and is it compliant with current environmental regulations?

The unit uses either R-404A or R-507A, both classified as HFCs under the Kigali Amendment. Units manufactured after Q3 2024 may transition to R-450A (GWP = 595) upon customer request to align with EU F-Gas Regulation (EU) No 517/2014 phase-down schedules.
Can the HLC-0840E operate unattended for extended periods?

Yes—it includes dry-run protection, overtemperature cut-off (110 °C hardware limit), high-pressure shutdown, and automatic restart after power interruption (configurable via menu setting).
Is remote monitoring supported out of the box?

RS-485 Modbus RTU is standard; Ethernet or Wi-Fi connectivity requires optional gateway module (Titan Part #NET-GW-HLC), sold separately.
What maintenance intervals are recommended for continuous operation?

Compressor oil and filter replacement every 12 months or 8,000 operating hours; annual verification of temperature sensor calibration traceable to NIST.
Does the unit meet GLP or GMP documentation requirements?

The embedded controller supports event logging and parameter change history. Full compliance with GLP (OECD Principles) or GMP (ICH Q7) depends on how the host laboratory implements procedural controls, backup, and review—Titan provides IQ/OQ documentation templates upon request.