Yi Heng DHP Series Electric Constant Temperature Incubators

Overview

The Yi Heng DHP Series Electric Constant Temperature Incubators are precision-engineered laboratory instruments designed for reliable, stable, and contamination-controlled cell culture, microbiological growth, enzyme assays, and general biological incubation applications. These units operate on resistive heating via embedded stainless-steel-sheathed heating elements, combined with forced-air convection driven by a microprocessor-regulated axial fan system. The core thermal control architecture employs a fuzzy logic PID algorithm—proven to minimize overshoot, reduce steady-state deviation, and maintain tight thermal stability across diverse ambient conditions. With a standard operating range from ambient +5°C to 65°C and temperature resolution of 0.1°C, the DHP Series meets the fundamental thermal performance requirements specified in ISO 13408-2 (sterile processing of medical devices), ASTM E171 (standard practice for conditioning containers), and general GLP-compliant environmental chamber validation protocols.

Key Features

• Fuzzy Logic PID Temperature Control: Delivers high reproducibility with ±0.5°C fluctuation and ±1.5°C uniformity (horizontal models at 37°C), minimizing thermal stress during sensitive cell proliferation phases.
• Intelligent Airflow Management: Fan speed automatically modulates based on real-time thermal load—reducing air velocity during stable incubation to prevent desiccation of culture media while maintaining homogeneity.
• Double-Glazed Observation Door (Standard on non-B models): Features an inner tempered glass panel; interlocks with heating and fan circuits to halt operation upon opening—eliminating thermal overshoot and ensuring operator safety.
• Mirror-Finished Stainless Steel Interior: Seamless, corrosion-resistant chamber construction facilitates cleaning, decontamination, and compliance with biosafety Level 1/2 containment practices.
• Independent Over-Temperature Protection: Hardware-based safety cutoff (optional) operates independently of the main controller, interrupting power when preset limits are exceeded—critical for unattended overnight runs.
• Programmable Multi-Segment Operation (Optional): Supports up to 7 user-defined programs, each comprising 9 time-temperature-fan profiles; enables gradient ramping, timed start/stop, and complex thermal cycling without external software.

Sample Compatibility & Compliance

The DHP Series accommodates standard tissue culture flasks (T25–T225), Petri dishes (up to 150 mm), multi-well plates, and microbiological slants. Its uniform airflow design prevents localized drying or condensation accumulation on vessel surfaces. All models comply with IEC 61010-1:2010 (safety requirements for electrical equipment for measurement, control, and laboratory use) and meet electromagnetic compatibility standards per EN 61326-1. When equipped with the optional UV-C germicidal lamp (254 nm), the chamber achieves >99.9% reduction of airborne Escherichia coli, Staphylococcus aureus, and Candida albicans within 30 minutes—supporting ISO 14644-1 Class 7 cleanroom-equivalent air quality during routine maintenance cycles.

Software & Data Management

While the base unit operates via front-panel keypad and LED/LCD display, optional RS485 serial interface enables integration into centralized lab monitoring systems using Modbus RTU protocol. This allows remote parameter logging, alarm event capture, and traceable temperature history export—essential for FDA 21 CFR Part 11–aligned electronic records in regulated QC/QA environments. Optional thermal printers provide hard-copy audit trails compliant with ISO/IEC 17025 documentation requirements. Data retention supports timestamped entries with operator ID fields (when integrated with external authentication systems), fulfilling ALCOA+ principles for data integrity.

Applications

• Mammalian and insect cell line propagation under controlled CO₂-free conditions
• Bacterial and fungal cultivation for antibiotic susceptibility testing (AST)
• Enzyme kinetics studies requiring precise thermal staging
• Seed germination and plant tissue culture pre-incubation
• Stability testing of biologics and diagnostic reagents per ICH Q1A(R2)
• Quality control of raw materials in pharmaceutical excipient manufacturing

FAQ

What is the maximum ambient temperature for safe operation?
The incubator is rated for continuous use in environments between +5°C and +35°C. Operation above 35°C may compromise temperature uniformity and shorten component service life.
Can the DHP Series be validated for GMP environments?
Yes—its stable thermal profile, hardware safety cutoff, and optional data logging interfaces support IQ/OQ/PQ protocols aligned with Annex 15 of the EU GMP Guide and FDA Process Validation Guidance.
Is the UV sterilization option suitable for routine decontamination between experiments?
The 254 nm UV-C module is intended for periodic chamber sanitation (e.g., weekly or after contamination events), not continuous irradiation. Exposure duration and cycle frequency must be validated per organism-specific kill curves.
Does the incubator support external humidity control?
No—this is a dry-air, temperature-only incubator. Humidity control requires separate humidified incubator platforms (e.g., CO₂/humidity combo units).
How many shelves are included, and are additional ones available?
Horizontal models ship with two adjustable stainless-steel shelves; vertical models include three or four. Additional shelves (part no. DHP-SH-SS) are orderable separately and maintain full load-bearing capacity and thermal conductivity.