Yiheng GHP Series Water-Jacketed Constant Temperature Incubator

Overview

The Yiheng GHP Series Water-Jacketed Constant Temperature Incubator is an engineered solution for stable, uniform thermal environments essential in cell culture, microbiological growth, enzymatic assays, and long-term stability studies. Unlike forced-air incubators, the GHP series employs a water-jacketed heating architecture—where a sealed outer chamber circulates thermostatically controlled water around the inner stainless-steel workspace. This design provides superior thermal mass, minimizing temperature gradients across the chamber and ensuring high reproducibility during extended operation. With a control range from ambient +5°C to 65°C and a typical fluctuation of ±0.3°C at setpoint, the system meets the stringent stability requirements of ISO 13408-2 (aseptic processing) and ASTM E1753 (standard practice for laboratory incubators). Its robust construction and passive thermal retention—maintaining near-setpoint conditions for over 90 minutes after power loss—make it suitable for unattended overnight runs in academic, clinical, and industrial labs.

Key Features

• Microprocessor-based PID temperature controller with dual-sensor feedback (air + water jacket), enabling precise regulation and adaptive response to load or ambient shifts.
• Integrated water-level monitoring circuitry: automatically halts heating and triggers audible/visual alarm upon low-water condition—preventing dry-heating damage and ensuring operational safety.
• Double-glazed, heat-insulated observation window with magnetic door seal; microfan circulation and heating suspend instantly upon door opening, eliminating overshoot and preserving chamber homogeneity.
• Electropolished 304 stainless-steel inner chamber and rounded corners for seamless cleaning, corrosion resistance, and compliance with ISO 14644-1 Class 7 cleanroom-compatible maintenance protocols.
• Independent mechanical overtemperature cutoff (optional): hardwired safety limiter that physically interrupts power if PID control fails—meeting IEC 61010-1 Category II requirements for lab equipment.
• Standard RS485 serial interface (Modbus RTU protocol) and optional thermal printer port support audit-trail-capable data export, facilitating FDA 21 CFR Part 11–aligned recordkeeping when paired with validated software.

Sample Compatibility & Compliance

The GHP series accommodates standard tissue-culture flasks (T25–T225), Petri dishes (up to 150 mm), multiwell plates (6–96-well), and serum bottles without airflow-induced desiccation—ideal for moisture-sensitive cultures including primary neurons, hybridomas, and anaerobic bacteria requiring non-turbulent thermal environments. All models are CE-marked and conform to EN 61000-6-3 (EMC emission) and EN 61000-6-2 (immunity). The water-jacket design inherently complies with USP sterility assurance principles by reducing air exchange rates (60% RH stability.

Software & Data Management

When connected to a host PC via RS485-to-USB adapter, the incubator streams real-time temperature values (chamber air + jacket water), alarm status, timer countdown, and event logs (door openings, power interruptions, setpoint changes). Yiheng’s optional LabLink™ software (v3.2+) provides configurable data sampling intervals (1–600 sec), encrypted CSV export, trend visualization with statistical overlays (mean, SD, min/max), and automated PDF report generation. Audit trails include user ID, timestamp, action type, and pre-/post-change parameter values—fully traceable per ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) data integrity principles. Raw log files retain SHA-256 checksums for forensic verification during regulatory inspections.

Applications

• Mammalian and insect cell line propagation under serum-containing or defined media conditions.
• Bacterial and fungal colony isolation and enumeration (e.g., ISO 4833-1, AOAC 977.27).
• Enzyme kinetics studies requiring strict thermal consistency across multi-hour time courses.
• Stability testing of biologics, vaccines, and diagnostic reagents per ICH Q5C guidelines.
• Pre-incubation of PCR master mixes and restriction digests prior to thermocycling.
• Long-term storage of cryopreserved vials post-thaw equilibration (2–8°C hold not supported; use refrigerated incubators for sub-ambient work).

FAQ

What is the recommended maintenance schedule for the water jacket?
Drain, flush, and refill the jacket with deionized water every 6 months; inspect silicone gaskets and level sensors annually. Use only non-ionic, low-conductivity water to prevent mineral buildup and sensor drift.

Can the GHP operate in a room with ambient temperature above 35°C?
No. Sustained ambient temperatures exceeding 35°C impair heat dissipation from the jacket and may trigger thermal shutdown. Install in climate-controlled spaces meeting ISO 14644-1 Class 8 or better environmental specifications.

Is calibration traceable to NIST standards?
Yes. Each unit ships with a factory calibration certificate (±0.2°C at 37°C) referenced to NIST-traceable PRT probes. On-site recalibration using accredited third-party services is supported via accessible sensor ports.

Does the incubator support remote monitoring via Ethernet or Wi-Fi?
Not natively. RS485 is the sole digital interface. Integration with building management systems (BMS) or SCADA platforms requires a protocol gateway (e.g., Modbus TCP converter) installed externally.

Are spare parts such as door seals and water-level sensors available globally?
Yes. Yiheng maintains a 10-year spare parts inventory for all GHP models through authorized distributors in EMEA, APAC, and North America. Lead time for critical components is ≤5 business days ex-warehouse.