Scientz CK-4007GD Intelligent Programmable Refrigerated/Heating Circulating Bath

Overview

The Scientz CK-4007GD is an intelligent, microprocessor-controlled refrigerated/heating circulating bath engineered for high-precision temperature management in demanding laboratory and industrial settings. Utilizing a dual-mode thermodynamic architecture—combining a high-efficiency hermetically sealed compressor with a precision resistive heating system—the CK-4007GD delivers stable thermal control across an exceptionally wide operating range of −40 °C to +200 °C. Its 7-liter stainless-steel bath reservoir supports both internal circulation (for uniform bath temperature) and external recirculation (for remote temperature conditioning of reactors, viscometers, spectrophotometer cells, or other process equipment). The unit employs an environmentally compliant refrigerant blend meeting current global phase-down requirements under the Kigali Amendment, ensuring regulatory alignment without compromising cooling capacity or long-term system reliability. Temperature regulation is achieved via adaptive PID algorithms with real-time deviation correction, enabling ±0.1 °C stability across the full range—a performance benchmark essential for kinetic studies, calibration traceability, and ISO/IEC 17025-compliant reference standard maintenance.

Key Features

• 32-segment programmable temperature/time profiling with ramp-and-soak capability, supporting complex thermal protocols without manual intervention
• Microprocessor-based digital controller with intuitive LCD interface, password-protected parameter access, and non-volatile memory retaining all settings after power loss
• Dual-mode operation: seamless transition between refrigeration and heating within a single instrument, eliminating need for separate cold/hot baths
• Low-noise refrigeration system featuring a hermetically sealed imported compressor (Taikang), optimized for continuous duty cycles and minimal acoustic emission (<55 dB(A))
• Robust safety architecture including dry-run protection, overtemperature cutoff, compressor thermal overload lockout, and low-bath-level sensor interlock
• User-configurable auto-restart mode: operators define whether the unit resumes prior operation or enters standby upon power restoration
• Timed operation function with programmable duration (1 min to 999 h), automatically terminating output at completion

Sample Compatibility & Compliance

The CK-4007GD accommodates aqueous, ethylene glycol/water, silicone oil, and mineral oil media—enabling application flexibility across low-temperature cryochemistry, mid-range enzymatic assays, and high-temperature polymerization studies. Its fluid-handling path is constructed from 316 stainless steel and fluoropolymer-lined components, ensuring chemical resistance against common solvents, acids, and bases. The unit conforms to IEC 61010-1:2010 for electrical safety in laboratory environments and carries CE marking. While not certified for medical device use, its design principles align with GLP documentation requirements—including audit-ready parameter logging, user-access controls, and unalterable event timestamps—supporting compliance in regulated QC/QA laboratories subject to FDA 21 CFR Part 11 or ISO 9001 audits.

Software & Data Management

The CK-4007GD operates autonomously via its embedded controller but supports optional RS-485 or USB-to-serial connectivity for integration into centralized lab automation systems (e.g., LabVIEW, SCADA, or LIMS platforms). Logged data—including setpoint, actual bath temperature, compressor status, and error codes—is timestamped and exportable as CSV files for post-experiment analysis. Firmware updates are performed via secure USB stick, preserving configuration integrity during version upgrades. No proprietary cloud service or vendor-hosted platform is required; all operational logic resides locally, ensuring data sovereignty and uninterrupted functionality in air-gapped facilities.

Applications

• Kinetic studies requiring precise thermal ramping (e.g., Arrhenius plot generation in catalysis research)
• Calibration of temperature-sensitive instrumentation including RTDs, thermistors, and infrared sensors
• Thermal conditioning of HPLC columns, GC injectors, and rheometer measuring systems
• Controlled-rate crystallization and polymorph screening in pharmaceutical development
• Material testing per ASTM D341 (viscosity–temperature relationships) and ISO 3104 (petroleum products)
• Bioreactor jacket temperature control in upstream bioprocessing workflows
• Stability testing of electronic components under thermal stress per JEDEC JESD22-A104

FAQ

What fluids are compatible with the CK-4007GD bath?

Water, 30–50% ethylene glycol/water mixtures, and silicone oils up to 200 °C are supported. Avoid halogenated solvents, strong oxidizers, or low-flash-point hydrocarbons.
Can the unit maintain ±0.1 °C stability at −40 °C and +200 °C simultaneously?

Stability is specified per operating point: ±0.1 °C is verified at representative setpoints across the range (e.g., −40 °C, 25 °C, 100 °C, 200 °C) under static load conditions per ISO 17025 calibration practices.
Is external circulation flow rate adjustable?

Yes—the integrated centrifugal pump offers continuously variable flow control (0–15 L/min) with pressure compensation to maintain consistent delivery despite backpressure variations.
Does the CK-4007GD support remote monitoring via Ethernet or Wi-Fi?

No native Ethernet/Wi-Fi module is included; however, third-party serial-to-Ethernet converters may be deployed for network integration, provided isolation and cybersecurity policies are observed.
What maintenance intervals are recommended?

Compressor oil inspection every 24 months; refrigerant leak check annually; bath fluid replacement every 6–12 months depending on usage and medium type. Full service documentation is provided with shipment.