YiHeng DHP Series Electrically Heated Constant-Temperature Incubator

Overview

The YiHeng DHP Series Electrically Heated Constant-Temperature Incubator is a benchtop-to-floor-standing laboratory incubation platform engineered for reliable, stable thermal environments in cell culture, microbiological growth, enzyme assays, and general biological storage applications. Designed around a forced-air convection architecture, the system employs a dual-wall insulated chamber with mirror-finish stainless-steel interior and embedded electric heating elements to ensure rapid thermal response and uniform heat distribution. Its core temperature regulation relies on a fuzzy logic PID algorithm—proven to minimize overshoot, reduce steady-state deviation, and maintain setpoint stability under variable load conditions. With an operating range from ambient +5°C to 65°C and certified uniformity of ±1.5°C across the working volume, the DHP series meets fundamental performance requirements for ISO 13485-aligned quality systems and GLP-compliant routine operations where reproducible thermal conditions are essential.

Key Features

• Fuzzy PID digital temperature controller with programmable timer (0–99 h 59 min), delivering high repeatability and low fluctuation (<±0.3°C typical deviation during steady state)
• Intelligent forced-air circulation system with auto-adjusting fan speed: fan RPM dynamically reduces during temperature stabilization to minimize shear stress on sensitive cultures while maintaining homogeneity
• Dual-door design featuring an inner tempered glass observation window—interlocks with heating and fan circuits to halt operation upon door opening, eliminating thermal overshoot and ensuring operator safety
• Mirror-polished 304 stainless-steel interior chamber resistant to corrosion and compatible with common lab disinfectants (e.g., 70% ethanol, hydrogen peroxide vapor)
• Independent mechanical over-temperature protection circuit (optional): activates at user-defined threshold, cutting power to heaters and triggering audible/visual alarm—compliant with IEC 61010-1 safety standards
• Modular expansion capability: RS485 serial interface (Modbus RTU protocol) supports integration into centralized lab monitoring systems; optional thermal printer enables real-time hardcopy logging of temperature traces

Sample Compatibility & Compliance

The DHP incubators accommodate standard SBS-format multiwell plates (6–384-well), Petri dishes, flasks (T25–T225), roller bottles, and custom sample racks within their scalable chamber volumes (16 L to 1000 L). The absence of active humidity control restricts use to applications where ambient RH suffices—such as bacterial colony propagation, yeast fermentation, or non-hygroscopic reagent storage. Units conform to CE marking requirements under the Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU). Optional UV-C (254 nm) germicidal lamps facilitate periodic decontamination of internal air and surfaces—supporting adherence to USP environmental monitoring guidelines for aseptic processing zones. While not certified for ISO 5 cleanroom integration, the sealed chamber design and smooth interior minimize particle retention, facilitating routine cleaning validation per ASTM E2656.

Software & Data Management

The optional multi-stage LCD controller provides full programmability: up to seven independent programs, each containing nine sequential steps. Each step allows concurrent setting of target temperature, fan speed level (0–5), dwell time (0–5999 minutes), and ramp rate (°C/min). All parameters are stored in non-volatile memory and retain settings after power interruption. When connected via RS485, the unit interfaces with third-party SCADA or LIMS platforms using standard Modbus register mapping—enabling remote configuration, real-time data polling (temperature, fan status, alarm flags), and automated audit trail generation. Data logging intervals are configurable from 1 second to 60 minutes; exported CSV files comply with FDA 21 CFR Part 11 requirements when used with validated software clients supporting electronic signatures and change history.

Applications

• Mammalian and insect cell line maintenance (e.g., HEK293, CHO-K1, Sf9) at 37°C with CO₂-independent protocols
• Bacterial culture (E. coli, Bacillus spp.) and fungal isolation (Aspergillus, Candida) under aerobic conditions
• Enzyme kinetics studies requiring precise thermal staging (e.g., denaturation/renaturation profiling)
• Stability testing of biologics and diagnostics reagents per ICH Q1A(R2) guidelines (long-term, accelerated conditions)
• Seed germination trials and plant tissue culture pre-incubation where humidity control is externally managed
• Quality control incubation for pharmaceutical raw materials per USP microbial limits testing

FAQ

Does the DHP series support CO₂ concentration control?
No—this model is strictly a temperature-controlled incubator without gas mixing, sensing, or humidification capabilities.
Is the UV sterilization module validated for log-reduction claims?
The optional UV-C lamp is intended for routine surface decontamination; users must perform in-house bioindicator challenge tests (e.g., Geobacillus stearothermophilus spores) to establish log reduction for their specific chamber geometry and exposure duration.
Can the incubator be calibrated internally without external equipment?
Yes—the controller includes a calibration offset function allowing adjustment against a traceable NIST-certified reference thermometer; full calibration documentation follows ISO/IEC 17025 principles when performed by qualified personnel.
What is the maximum allowable ambient temperature for continuous operation?
Rated for ambient environments up to 30°C; operation above this may degrade temperature uniformity and extend recovery time after door openings.
Are replacement parts such as fan assemblies or heating elements available globally?
YiHeng maintains an international spare parts catalog with lead times under 4 weeks for most components; OEM service manuals and wiring diagrams are provided under NDA to authorized distributors.