Brookfield DRETOP ZSH Series Biochemical Incubator

Overview

The DRETOP ZSH Series Biochemical Incubator is a precision-engineered environmental control system designed for stable, long-term temperature regulation across demanding life science applications. Built upon a dual-mode thermoregulation architecture—integrating high-efficiency compressor-based refrigeration with PID-controlled resistive heating—the ZSH series delivers continuous, uninterrupted thermal stability from −10 °C to 90 °C. This wide operational envelope supports diverse experimental protocols including BOD (Biochemical Oxygen Demand) testing per ISO 5815-1:2019, microbial growth kinetics under sub-ambient conditions, enzyme activity assays, cell culture preconditioning, and environmental stress simulation. The chamber’s structural integrity is reinforced by a seamless 304 stainless-steel interior, corrosion-resistant insulation, and a double-gasketed door seal minimizing thermal leakage and ensuring consistent internal homogeneity (≤1.5 °C uniformity). Temperature is monitored in real time by two independently calibrated Class A PT100 sensors—one positioned at the chamber center and one near the air circulation outlet—enabling dynamic compensation for spatial gradients and enhancing measurement traceability.

Key Features

• Dual-mode temperature control system with compressor refrigeration and solid-state heating for precise setpoint maintenance across −10 °C to 90 °C
• High-resolution 0.1 °C temperature setting resolution and ±0.5 °C fluctuation tolerance under steady-state conditions
• Redundant Class A PT100 sensor array with automatic cross-validation and fault-triggered alarm escalation
• Intelligent door monitoring logic: triggers simultaneous audible and visual alerts if door remains open beyond user-defined threshold or opens without authentication
• Isolated RS485 communication interface compliant with Modbus RTU protocol, enabling integration into centralized laboratory information management systems (LIMS) and SCADA platforms
• Full-color TFT touchscreen HMI with intuitive navigation, multi-level password protection, and event-log timestamping
• Ø50 mm pass-through port with silicone gasket for external probe routing or gas line integration without compromising chamber integrity
• UV-C germicidal lamp (254 nm) for periodic decontamination of interior surfaces, supporting GLP-aligned cleaning validation workflows

Sample Compatibility & Compliance

The ZSH series accommodates standard microbiological vessels—including Petri dishes, test tubes, Erlenmeyer flasks, and multi-well plates—as well as larger custom containers up to 30 kg per adjustable shelf. Its stainless-steel construction meets ISO 14644-1 Class 5 cleanroom compatibility requirements for surface particulate retention. While not certified for IEC 61010-1:2010 Annex BB (biological safety cabinets), the unit complies with general electrical safety standards for laboratory equipment. Data integrity features—including tamper-evident audit trails, time-stamped event logs, and RS485 transaction records—support alignment with FDA 21 CFR Part 11 principles when paired with validated third-party software. Temperature performance validation adheres to ASTM E2798–21 “Standard Practice for Performance Verification of Environmental Chambers.”

Software & Data Management

The incubator generates structured CSV-formatted data streams via its RS485 interface, containing timestamped temperature readings, alarm events, door status transitions, and sensor health diagnostics. Raw output requires conversion using DRETOP’s proprietary PC-based utility (v3.2+), which produces export-ready Excel (.xlsx) or PDF reports with embedded digital signatures and metadata tags (e.g., operator ID, calibration certificate reference, environmental timestamp). The software supports batch report generation, trend chart overlays, and deviation flagging per user-defined thresholds. Optional cloud connectivity enables remote firmware updates, real-time parameter viewing, and push-notifications for critical alarms—functionality auditable through TLS 1.2 encrypted session logs.

Applications

• Biochemical Oxygen Demand (BOD) analysis per APHA Standard Methods 5210B and ISO 5815-1
• Microbial enumeration and viability studies under controlled thermal stress (e.g., psychrophilic, mesophilic, thermophilic strains)
• Seed germination trials and plant tissue culture pre-incubation
• Enzyme kinetics profiling requiring precise sub-zero stabilization
• Pharmaceutical stability testing per ICH Q1A(R2) guidance (long-term and accelerated conditions)
• Environmental simulation for ecotoxicology assays and wastewater treatment modeling

FAQ

Does the ZSH series support GLP-compliant data archiving?
Yes—when used with DRETOP’s validated data conversion software and configured with enabled audit trail logging, the system meets core ALCOA+ criteria for attributable, legible, contemporaneous, original, and accurate records.
Can the incubator operate continuously at −10 °C in ambient environments above 30 °C?
Yes—the compressor system is rated for continuous operation at full cooling capacity under ISO 13732-3 ambient load conditions (up to 35 °C / 80% RH).
Is UV disinfection cycle duration programmable?
Yes—exposure time (1–60 minutes), intensity level, and post-cycle ventilation delay are fully configurable via the touchscreen interface.
What third-party protocols does the RS485 port support besides Modbus RTU?
The interface also implements ASCII-based command sets compatible with legacy LabVIEW and Python-based control frameworks; custom protocol mapping is available upon request with NDA.
Are calibration certificates provided with each unit?
Each ZSH series incubator ships with a factory-issued temperature uniformity and accuracy verification report, traceable to NIM (National Institute of Metrology, China) standards. On-site IQ/OQ documentation packages are available as optional services.