THZ-C Desktop Air-Bath Constant-Temperature Orbital Shaker

Overview

The THZ-C Desktop Air-Bath Constant-Temperature Orbital Shaker is an engineered platform for precise, reproducible incubation and mixing of biological samples under controlled thermal and mechanical conditions. Utilizing forced-air convection heating and a brushless DC motor-driven eccentric drive mechanism, the system delivers stable orbital motion with minimal vibration transmission—critical for sensitive cell cultures, microbial suspensions, and enzyme kinetics assays. Unlike water-bath shakers, the air-bath design eliminates fluid contamination risks, simplifies cleaning, and enables rapid temperature equilibration across the entire chamber volume. The unit operates within a validated ambient-to-60 °C range, with ±0.3 °C temperature uniformity (measured at center, 37 °C, no load) and ±0.1 °C setpoint stability over 8 hours—performance characteristics aligned with ISO 13408-2 (aseptic processing equipment validation) and ASTM E1509 (laboratory shaker performance testing) guidelines.

Key Features

• Brushless DC motor with microprocessor-controlled speed regulation ensures high torque delivery across the full 20–300 rpm range, with <±1 rpm speed accuracy and <±0.5 rpm drift over 24 h.
• 26 mm orbital diameter optimized for uniform mixing in standard culture vessels (e.g., Erlenmeyer flasks up to 2 L, multi-well plates, test tubes), minimizing shear stress on mammalian and bacterial cells.
• Digital PID temperature control with dual-sensor feedback (chamber air + platform surface) enables rapid ramping (≤15 min from 25 °C to 37 °C) and tight thermal consistency across shelf loading conditions.
• Single-platform configuration supports flexible vessel arrangement; platform surface features non-slip silicone matting and universal flask clamps compatible with 50 mL–2 L containers.
• Programmable timer (0–999 min) with auto-shutdown and audible alarm; memory retention preserves last-used parameters after power interruption.
• Robust steel chassis with powder-coated enclosure and front-access ventilation grilles ensures long-term reliability in shared lab environments.

Sample Compatibility & Compliance

The THZ-C accommodates common life science sample formats including glass and polycarbonate Erlenmeyer flasks (50–2000 mL), sterile disposable bioreactor bags (up to 2 L), microtiter plates (96-/384-well), and centrifuge tubes (15–50 mL). Its air-bath architecture meets GLP requirements for traceability in QC microbiology workflows (e.g., USP , EP 2.6.12). The device complies with IEC 61010-1:2010 safety standards for laboratory electrical equipment and carries CE marking under the EU Low Voltage Directive. Optional calibration certificates (NIST-traceable RTD sensor verification) are available upon request to support ISO/IEC 17025-accredited laboratories.

Software & Data Management

While the THZ-C operates via intuitive front-panel controls (4-digit LED display, membrane keypad), it supports optional RS-232 serial interface for integration into centralized lab management systems. When connected to validated PC software (supplied separately), users can log real-time temperature and speed profiles, generate PDF reports compliant with FDA 21 CFR Part 11 (electronic records/signatures), and export CSV files for statistical process control (SPC) analysis. Audit trails record operator ID, parameter changes, runtime events, and calibration history—enabling full GMP audit readiness.

Applications

• Microbial growth studies (E. coli, yeast, Bacillus spp.) requiring consistent aeration and thermal stability.
• Protein expression in shake-flask bioreactors under defined DO and temperature setpoints.
• Cell suspension culture maintenance for hybridoma or CHO lines prior to bioreactor scale-up.
• Enzyme activity assays where reaction kinetics depend on homogeneous mixing and narrow thermal windows.
• Antibiotic susceptibility testing (AST) using broth microdilution protocols per CLSI M07-A11.
• Sample homogenization prior to DNA/RNA extraction or ELISA preparation.

FAQ

Is the THZ-C suitable for CO₂-sensitive applications?
No—this unit lacks CO₂ regulation and gas-tight sealing. It is intended for aerobic or ambient-air-dependent cultures only.
Can the platform accommodate uneven loads without imbalance-induced vibration?
Yes—the balanced eccentric drive and reinforced aluminum platform maintain stability with ≤70% asymmetric loading (e.g., one 2-L flask + four 50-mL tubes).
What is the recommended calibration interval?
Annual verification against NIST-traceable standards is advised; temperature uniformity and speed accuracy should be confirmed before critical validation runs.
Does the unit support external temperature probes for media monitoring?
Not natively—but the RS-232 interface allows third-party probe integration via custom scripting in LabVIEW or Python-based control environments.
Is the THZ-C compliant with environmental directives such as RoHS and WEEE?
Yes—manufactured in accordance with RoHS 2011/65/EU and WEEE 2012/19/EU requirements; material declarations available upon request.