DRETOP ZSH-70 Biochemical Incubator
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | ZSH-70 |
| Heating Method | Air-jacketed |
| Cooling Method | Compressor-based |
| Air Circulation | Forced convection |
| Temperature Range | 0–70°C |
| Temperature Accuracy | ±0.1°C |
| Temperature Uniformity | ±1.0°C (empty, at 25°C) |
| Temperature Fluctuation | ±0.5°C |
| Chamber Capacity | 70 L |
| External Dimensions (W×D×H) | 590 × 565 × 1092 mm |
Overview
The DRETOP ZSH-70 Biochemical Incubator is a precision-engineered, dual-mode temperature-controlled chamber designed for stable, reproducible environmental conditioning of biological and biochemical samples. Utilizing an air-jacketed heating system coupled with a high-efficiency compressor-based cooling module, the ZSH-70 maintains precise thermal setpoints across its full operating range of 0–70°C—enabling year-round operation without seasonal performance compromise. Its forced-air convection architecture ensures rapid thermal equilibration and minimal spatial gradient, meeting the stringent requirements of BOD testing, microbial cultivation, enzymatic assays, cell viability studies, and stability testing in accordance with ISO 8573-1, ASTM D5220, and USP . The incubator’s robust stainless-steel interior, seamless welds, and optimized airflow path minimize contamination risk and support routine sterilization protocols under GLP-compliant laboratory workflows.
Key Features
- Microprocessor-based P.I.D. temperature controller with 0.1°C resolution, real-time display, and programmable over-temperature alarm (adjustable threshold)
- Air-jacketed heating system with independent thermal regulation—ensures uniform heat distribution and eliminates cold spots near chamber walls
- High-efficiency hermetic compressor with eco-friendly R134a refrigerant (F-series compliant), integrated start-delay and cycle-interval protection to extend service life
- Forced convection via low-noise axial fan and engineered internal ducting—achieves ≤±0.5°C temperature fluctuation and ≤±1.0°C uniformity (empty, at 25°C)
- Dual-door observation window: outer magnetic door seal + inner tempered glass—maximizes thermal insulation and minimizes condensation
- Modular stainless-steel interior with removable, height-adjustable shelves; radius-corner design eliminates cleaning blind spots
- Four-point leveling feet with dual-function casters (swivel + lock)—facilitates safe repositioning and stable operation on uneven surfaces
- Power-loss recovery mode with parameter memory retention—preserves user-defined settings after unexpected shutdown or mains interruption
Sample Compatibility & Compliance
The ZSH-70 accommodates standard microbiological vessels (Petri dishes, test tubes, flasks up to 1 L), multi-well plates, and BOD bottles. Its 70 L working volume supports concurrent parallel experiments while maintaining thermal fidelity. The unit complies with IEC 61010-1:2010 safety standards for laboratory equipment and meets electromagnetic compatibility (EMC) requirements per EN 61326-1. Optional BOD-rated sockets (IPX4 rated) provide isolated, moisture-resistant power delivery for dissolved oxygen probes and electrochemical sensors during extended aerobic biodegradability assays. All materials contacting the chamber interior are non-leaching and autoclavable—validated for repeated use in ISO/IEC 17025-accredited testing laboratories.
Software & Data Management
While the base ZSH-70 operates via standalone microcontroller interface, optional RS485 serial communication enables integration into centralized lab monitoring systems (e.g., LabVantage, Thermo Fisher SampleManager). With the optional intelligent program controller, users can define up to 30 segmented temperature profiles with ramp/soak logic and time-stamped event logging. Audit-trail functionality—including operator ID, parameter changes, and alarm history—is available when paired with FDA 21 CFR Part 11-compliant data acquisition software (sold separately). Internal memory retains ≥10,000 timestamped temperature readings at 1-minute intervals—exportable via USB or serial port for QC documentation and regulatory submissions.
Applications
- Biochemical Oxygen Demand (BOD5) determination per APHA Standard Methods 5210B and ISO 5815-1
- Microbial growth kinetics studies (E. coli, S. aureus, P. aeruginosa) under controlled aerobic conditions
- Enzyme activity profiling across temperature gradients (e.g., amylase, protease, lipase assays)
- Seed germination and plant tissue culture pre-incubation (phytotox assay preparation)
- Stability testing of diagnostic reagents, vaccines, and biologics per ICH Q1A(R2)
- Environmental simulation for wastewater treatment process optimization and sludge respiration rate analysis
FAQ
What is the recommended calibration interval for the ZSH-70?
Annual calibration using NIST-traceable thermistors is advised; verification at three points (10°C, 25°C, 45°C) per ISO/IEC 17025 Clause 6.5.
Can the ZSH-70 operate continuously at 4°C?
Yes—the compressor-based cooling system is rated for uninterrupted operation at temperatures as low as 0°C, with thermal load management preventing coil icing.
Is the stainless-steel interior electropolished?
No—it features a #4 brushed finish (ASTM A480), sufficient for routine disinfection with 70% ethanol or 0.5% sodium hypochlorite; electropolishing is available as a custom order.
Does the unit include a CO₂ or humidity control option?
No—this is a temperature-only incubator; DRETOP offers separate CO₂ and humidified models (ZSC and ZSH-H series) for mammalian cell culture applications.
What is the mean time between failures (MTBF) for the compressor module?
Based on accelerated life testing under continuous 25°C operation, MTBF exceeds 35,000 hours (≈4 years at 24/7 duty cycle) with scheduled maintenance every 12 months.
