Chengmengweiye CM-24TS Corrosion-Resistant Electrically Adjustable Water Bath Nitrogen Evaporator

Overview

The Chengmengweiye CM-24TS Corrosion-Resistant Electrically Adjustable Water Bath Nitrogen Evaporator is an engineered solution for controlled, parallel solvent evaporation in analytical laboratories. It operates on the principle of gentle inert-gas displacement—introducing precisely regulated nitrogen or compressed air across the surface of heated liquid samples to accelerate solvent volatilization without thermal degradation. Unlike dry-block or infrared evaporators, the water bath design ensures uniform, non-contact heating and minimizes localized overheating, making it especially suitable for thermolabile analytes in pesticide residue, pharmaceutical, environmental, and clinical applications. The system integrates electric motor-driven vertical adjustment of gas delivery needles, enabling real-time optimization of gas-to-surface distance per sample—a critical parameter influencing evaporation efficiency and reproducibility.

Key Features

• Electrically actuated height adjustment (80 mm stroke) for individual PTFE-coated gas needles—ensuring optimal distance from solvent surface across varying tube geometries (10–29 mm diameter) and volumes (1–50 mL).
• Corrosion-resistant construction: Entire gas path—including needles, guide tubes, and sample support plate—features PTFE coating; housing and water bath interior are electropolished stainless steel compliant with ISO 8502-3 for acid/alkali resistance.
• Dual independent gas circuits: One dedicated to high-purity nitrogen (for oxidation-sensitive compounds), another to filtered compressed air (for robust matrices); each with calibrated needle valves and integrated flow meters (0–15 L/min total, adjustable per channel).
• Intelligent PID temperature control with 66×45 mm backlit LCD interface; maintains setpoint within ±0.5 °C over full range (ambient +5 °C to 99 °C); includes overtemperature cutoff and dry-run protection.
• Rotatable 360° sample carrier with engraved numeric positions (1–24); spring-loaded PTFE-lined tube clamps ensure secure fixation without deformation or cross-contamination.
• Compact footprint (420×420 mm base) optimized for fume hood integration; transparent SMC TUS polymer tubing (odorless, halogen-free) meets UL 94 V-0 flammability rating.

Sample Compatibility & Compliance

The CM-24TS accommodates standard laboratory vessels including round-bottom test tubes (Φ10–29 mm), conical centrifuge tubes, and small-volume vials (1–50 mL). Its PTFE-wetted components resist aggressive solvents (e.g., chloroform, acetonitrile, concentrated HCl/HNO₃), supporting EPA Method 508.1, AOAC 991.22, and ISO 17025-accredited workflows. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and incorporates fail-safes aligned with GLP documentation requirements—including time-stamped temperature logs and alarm event recording. When operated inside a certified fume hood (per ANSI/AIHA Z9.5), it satisfies OSHA 1910.1200 for handling hazardous volatile organics.

Software & Data Management

While the CM-24TS operates as a standalone instrument with embedded firmware, its analog temperature output (0–10 V) and digital relay signals (for timer completion and overtemp alerts) support integration into centralized lab data acquisition systems (e.g., LabVIEW, DeltaV, or LIMS via optional RS-485 module). All temperature setpoints, actual bath readings, timer status, and fault codes are retained in non-volatile memory for audit trail generation. The PID controller’s auto-tuning function eliminates manual calibration drift, ensuring long-term repeatability required under FDA 21 CFR Part 11-compliant environments when paired with validated electronic record systems.

Applications

• Pesticide Residue Analysis: Rapid concentration of QuEChERS extracts from fruits, vegetables, and cereals prior to GC-MS/MS or LC-MS/MS injection.
• Pharmaceutical Quality Control: Solvent removal from stability-indicating HPLC fractions and dissolution media in accordance with USP and ICH Q5C guidelines.
• Environmental Monitoring: Pre-concentration of trace-level PAHs, PCBs, and organochlorine pesticides from aqueous environmental matrices (drinking water, wastewater, sediment pore water).
• Clinical Toxicology: Preparation of plasma, serum, and urine samples for quantification of drugs of abuse, therapeutic agents, and metabolites using tandem mass spectrometry.
• Food Safety Testing: Cleanup and concentration steps in dioxin/furan analysis (EPA 1613B), melamine detection, and mycotoxin screening protocols.

FAQ

Is the CM-24TS compatible with both nitrogen and compressed air?
Yes—the dual-gas manifold allows simultaneous or independent connection to nitrogen and oil-free compressed air sources. Each circuit features a dedicated flow meter and fine-adjustment valve.

What maintenance is required for long-term corrosion resistance?
Rinse the water bath chamber with deionized water after each use; inspect PTFE coatings annually for micro-cracking using 10× magnification. Replace gas needles every 12 months under continuous operation.

Can the instrument be validated for GMP environments?
Yes—its deterministic temperature control, traceable calibration points (NIST-traceable RTD sensor), and alarm logging capability support IQ/OQ/PQ protocols. Full validation documentation templates are available upon request.

Does the system support unattended overnight operation?
Yes—the programmable timer (up to 9999 minutes), dry-run protection, and overtemperature cutoff enable safe extended runs. We recommend periodic verification of gas line integrity and bath fluid level before initiating >8-hour protocols.