ZiQi DHP-9032 Electric Constant Temperature Incubator

Overview

The ZiQi DHP-9032 Electric Constant Temperature Incubator is an engineered solution for precise, stable thermal environments required in microbiological culture, cell propagation, enzyme activity assays, and routine quality control testing. Designed according to fundamental principles of convective heat transfer and closed-loop thermal regulation, the unit employs a six-surface direct heating architecture—where resistive heating elements are embedded across all interior chamber walls—to minimize thermal gradients and accelerate temperature stabilization. Combined with forced-air convection via a low-turbulence centrifugal fan, this configuration ensures high spatial uniformity (±0.5°C) and rapid recovery after door opening. The incubator operates within a controlled range of RT+5°C to 65°C, making it suitable for mesophilic bacterial growth (e.g., Escherichia coli, Bacillus subtilis), fungal incubation, and stability studies compliant with ICH Q1A(R2) guidelines.

Key Features

• Large backlit LCD display showing real-time temperature, setpoint, elapsed time, and timer status—all visible at a glance without menu navigation.
• Double-glazed, dual-door structure with low-emissivity thermal barrier seals; minimizes heat loss during observation and maintains chamber integrity during frequent access.
• Polished mirror-finish stainless steel interior (AISI 304 grade) with radius-corner geometry—resists corrosion, facilitates decontamination, and eliminates microbial harborage points.
• Adjustable stainless steel shelving system (standard: two trays); shelf height can be repositioned to accommodate flasks, Petri dishes, or multi-well plates of varying heights.
• High-efficiency PTC-based electric film heaters integrated into all six chamber surfaces—enabling uniform thermal distribution and reducing warm-up time by up to 40% versus conventional bottom-heating designs.
• Independent over-temperature cut-off circuit (optional): activates at user-defined threshold (default: 70°C), interrupting power to heating elements and triggering audible/visual alarm—critical for unattended overnight operation and GLP-compliant workflows.
• RS485 communication interface (optional): supports Modbus RTU protocol for integration with central monitoring systems, data loggers, or LIMS platforms—enabling audit-trail generation per FDA 21 CFR Part 11 requirements.

Sample Compatibility & Compliance

The DHP-9032 accommodates standard laboratory vessels including 100–500 mL Erlenmeyer flasks, 90 mm Petri dishes (up to 12 per shelf), 24-/96-well microplates, and stacked culture tubes. Its 35 L working volume (340 × 320 × 320 mm internal dimensions) allows simultaneous processing of multiple sample sets under identical thermal conditions. The unit conforms to IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments. While not certified for medical device manufacturing, its temperature stability profile meets ASTM E122-22 criteria for statistical sampling precision and supports validation protocols aligned with ISO/IEC 17025:2017 clause 7.8.3 (equipment verification).

Software & Data Management

The built-in digital PID controller provides auto-tuning capability and stores up to three programmable temperature profiles. When equipped with the optional RS485 module, the incubator interfaces with ZiQi’s proprietary PC-based software (ZiLog v3.2), enabling remote parameter setting, real-time graphing of temperature history, and export of CSV-formatted logs with timestamps. All logged data include operator ID, event type (e.g., “setpoint change”, “door open”), and system status flags—satisfying traceability requirements for GMP Annex 11 and WHO TRS 961 Annex 5 documentation frameworks.

Applications

• Microbiological enumeration (ISO 4833-1:2013, AOAC 977.27)
• Bacterial endotoxin testing (USP ) requiring controlled incubation at 37°C
• Enzyme kinetics studies where thermal drift must remain below ±0.3°C over 24 h
• Stability testing of pharmaceutical excipients per ICH Q1A(R2) long-term conditions (25°C/60% RH simulated via dry incubation)
• Quality assurance of diagnostic reagents and ELISA kits
• Teaching laboratories conducting basic bacteriology labs under CLSI M22-A3 guidelines

FAQ

What is the recommended calibration frequency for the DHP-9032?
Annual calibration against NIST-traceable reference thermometers is advised; internal sensor verification using a calibrated thermistor probe should be performed before each critical experiment.
Can the DHP-9032 operate continuously for 72 hours or longer?
Yes—the unit is rated for uninterrupted operation under ambient conditions ≤30°C and ≤60% RH; continuous use requires periodic visual inspection of door gaskets and fan operation.
Is the stainless steel interior passivated to prevent iron leaching in sensitive cell culture applications?
The AISI 304 chamber undergoes electropolishing post-fabrication, achieving Ra ≤0.4 µm surface roughness and reducing extractables—validated per USP for non-metallic components.
Does the incubator support ramp-and-soak temperature programming?
No—this model implements single-setpoint PID control only; multi-stage thermal profiles require external programmable controllers interfaced via RS485.
How is temperature uniformity verified during IQ/OQ qualification?
Per ISO 14644-3 Annex B, nine-point mapping (center + eight corners) is conducted at 37°C and 55°C using calibrated PT100 probes with ±0.05°C uncertainty; deviation must remain within ±0.5°C across all locations.