LAUDA Ultratemp UT 3505 W Process Temperature Controller for Bioprocessing

Overview

The LAUDA Ultratemp UT 3505 W is an industrial-grade process temperature controller engineered specifically for demanding bioprocess applications—including mammalian cell culture, microbial fermentation, and downstream purification steps in biopharmaceutical manufacturing. It operates on a closed-loop, forced-circulation principle, delivering precise thermal energy transfer via a non-flammable heat transfer medium (water or water/glycol mixture) to external bioreactors, jacketed vessels, or heat exchangers. Its thermodynamic architecture integrates a water-cooled condenser and high-efficiency compressor system, enabling rapid thermal response across the full operating range of −5 °C to +60 °C. With a nominal heating and cooling capacity of 35 kW, the UT 3505 W is dimensioned for reactor volumes up to 5,000 L—addressing the dynamic thermal load profile typical of upstream bioprocessing: high-power heating during inoculation (e.g., ramping from ambient to 37 °C over 6–8 hours), low-power maintenance during exponential growth phase, and high-capacity refrigeration during harvest cooling (e.g., reduction from 37 °C to 4–20 °C).

Key Features

• Stainless-steel enclosure rated IP54—suitable for controlled industrial environments and semi-outdoor installation, resistant to cleaning agents and humidity
• Dual-frequency power compatibility (400 V / 3~ / 50 Hz and 460 V / 3~ / 60 Hz) for global deployment without voltage conversion hardware
• Integrated high-flow, corrosion-resistant pump with real-time digital pressure monitoring and built-in particulate filtration
• Water-cooled condenser design minimizes ambient heat rejection—reducing HVAC load and improving facility energy efficiency
• LCD interface with intuitive plain-text menu navigation; supports local operation without external software
• Ethernet port with native Modbus TCP/IP protocol for seamless integration into SCADA, DCS, or MES systems
• Flexible I/O architecture: 4–20 mA analog input for remote setpoint control; discrete digital inputs/outputs for equipment interlock, status signaling, and low-fluid-level alarms
• Support for external Pt100 sensors and optional reverse-flow protection via integrated solenoid valve interface

Sample Compatibility & Compliance

The UT 3505 W is designed for integration with single-use and stainless-steel bioreactors, chromatography skids, centrifuge jackets, and tangential flow filtration (TFF) systems. Its use of non-flammable, USP-grade compatible heat transfer fluids aligns with ICH Q5C stability requirements and supports cGMP-compliant operations. The device meets EN 61000-6-2 (immunity) and EN 61000-6-4 (emissions) standards. While not intrinsically safe, its IP54 rating and stainless-steel wetted parts facilitate compliance with ISO 14644-1 Class 7/8 cleanroom adjacent installations. Firmware supports configurable audit trails and user access levels—facilitating alignment with FDA 21 CFR Part 11 requirements when deployed with validated LAUDA Cloud services and electronic logbook modules.

Software & Data Management

The UT 3505 W embeds a web-enabled network server, allowing remote configuration, real-time parameter monitoring, and historical trend review via standard browsers. When connected to LAUDA Cloud, it enables predictive maintenance analytics, firmware update orchestration, and centralized fleet diagnostics. All communication—whether local or cloud-based—uses TLS-encrypted sessions. Data logging intervals are configurable from 1 second to 1 hour; logged parameters include actual/setpoint temperature, pump pressure, fluid level, compressor status, and alarm history. Export formats include CSV and PDF for GLP-compliant documentation. Optional OPC UA server add-on provides bidirectional data exchange with PI System, Ignition, or Siemens Desigo CC.

Applications

• Temperature control of stirred-tank bioreactors (2,000–5,000 L) during fed-batch and perfusion cultures
• Cooling of harvest streams prior to depth filtration or centrifugation
• Jacket temperature regulation for chromatographic columns during protein A elution and buffer exchange
• Thermal conditioning of buffer preparation tanks and media storage vessels
• Environmental simulation for stability studies in pilot-scale bioprocess development
• Integration with single-use systems requiring precise, low-particulate thermal management

FAQ

What is the minimum and maximum ambient temperature for reliable operation?
The UT 3505 W maintains full performance within an ambient range of −15 °C to +50 °C.
Can the unit operate with pure water as the heat transfer fluid?
Yes—though glycol mixtures (e.g., 30% propylene glycol) are recommended for sub-zero operation or freeze protection in unheated utility corridors.
Is the device compliant with FDA 21 CFR Part 11 for electronic records?
When deployed with LAUDA Cloud’s validated e-signature and audit trail module, it supports Part 11 compliance; standalone local operation does not constitute a Part 11 system.
Does the UT 3505 W support cascade control loops?
Yes—via analog 4–20 mA setpoint input, it can accept temperature commands from an external master controller implementing PID or model-predictive algorithms.
What maintenance intervals are recommended for the integrated filter and pump?
The particulate filter should be inspected quarterly and replaced annually under continuous operation; pump oil and seals require servicing every 24 months per LAUDA Service Bulletin UT-SB-2023-01.