CZGY HH-YRC500T Acid-Base Resistant PTFE-Coated Circulating Water Bath

Overview

The CZGY HH-YRC500T is a laboratory-grade circulating water bath engineered for precise thermal control in chemically aggressive environments. Unlike standard water baths, it integrates a full PTFE (polytetrafluoroethylene) spray coating on the 304 stainless steel inner tank — a critical design feature enabling direct contact with moderately concentrated acidic and alkaline solutions during heating operations. Its thermoregulation system employs a super fuzzy PID algorithm with segment-type LCD display, delivering high reproducibility across extended operation cycles. The unit operates via bottom-mounted external heating elements and utilizes an acid-alkali resistant magnetic drive circulation pump, eliminating seal leakage risks and ensuring long-term reliability under corrosive load conditions. Designed for continuous-duty applications in QC labs, synthetic chemistry workflows, and materials dissolution studies, the HH-YRC500T complies with fundamental safety and performance expectations outlined in IEC 61010-1 for laboratory electrical equipment.

Key Features

• PTFE-sprayed 304 stainless steel inner tank — certified resistance to HCl (≤10%), NaOH (≤5%), H₂SO₄ (≤5%), and common organic solvents at elevated temperatures
• Robust internal recirculation system powered by a corrosion-resistant magnetic-coupled pump (no mechanical shaft seals)
• Super fuzzy PID temperature controller with 0.1°C resolution and ±0.5°C stability over 8-hour dwell time at 85°C
• 3000 W high-power heating module with dual-stage overtemperature protection (mechanical + electronic cutoff)
• Adjustable timer function supporting three operational modes: countdown (0–9999 min), count-up (0–9999 h), and interval cycling
• Mobile configuration with locking casters and adjustable leveling feet for flexible benchtop or floor placement
• Front-panel accessible fuse holder and independent power switch meeting GLP documentation requirements

Sample Compatibility & Compliance

The HH-YRC500T accommodates a wide range of sample containers including borosilicate glass beakers (up to 1 L), PTFE-lined reaction vessels, quartz cuvettes, and stainless steel autoclave inserts. Its PTFE-coated chamber maintains integrity during prolonged exposure to pH 1–13 aqueous media below 95°C. While not certified to ISO/IEC 17025 calibration standards out-of-box, the unit supports traceable calibration via external Pt100 probe integration (optional accessory). It conforms to general laboratory safety frameworks referenced in ASTM E1510 (Standard Guide for Selection and Use of Laboratory Equipment) and aligns with functional prerequisites for USP Analytical Instrument Qualification when deployed in regulated pharmaceutical environments.

Software & Data Management

This model operates as a standalone analog-digital hybrid instrument without embedded networking or PC connectivity. All operational parameters — setpoint, real-time temperature, elapsed time, and alarm status — are displayed locally on the segmented LCD interface. For laboratories requiring audit-ready records, optional RS485 serial output (with Modbus RTU protocol) is available upon request, enabling integration into SCADA or LIMS platforms for automated data logging. The firmware retains last-set configuration after power interruption and supports password-protected parameter lockdown — a feature commonly leveraged in multi-user GMP facilities to prevent unauthorized changes to validated operating conditions.

Applications

• Controlled-temperature dissolution testing of active pharmaceutical ingredients (APIs) in buffered acidic/alkaline media per USP
• Pre-heating and thermal equilibration of reagents prior to GC, HPLC, or ICP-MS analysis
• Accelerated stability studies involving hydrolytic degradation pathways under defined pH/temperature stress
• Enzyme kinetics assays requiring stable thermal environments for extended incubation periods
• Calibration of temperature-sensitive sensors (e.g., thermistors, RTDs) using NIST-traceable reference probes
• Supporting ASTM D2196 (viscosity of non-Newtonian materials) via bath-controlled rotational viscometer immersion

FAQ

Can this bath be used with organic solvents such as acetone or chloroform?
Yes — the PTFE coating provides broad compatibility with most non-halogenated and low-polarity organics; however, prolonged exposure to THF, DMF, or strong oxidizers (e.g., nitric acid >5%) is not recommended.
Is external temperature calibration possible?
Yes — the unit includes a dedicated 2 mm diameter probe port adjacent to the sensor well, allowing insertion of an external calibrated Pt100 or thermocouple for verification or adjustment.
Does the magnetic pump support continuous 24/7 operation?
Yes — rated for uninterrupted service up to 10,000 hours under nominal load; maintenance intervals are specified at 2,000-hour intervals per manufacturer’s technical bulletin TB-HH-YRC-2023.
What is the maximum fill level to ensure optimal circulation and temperature uniformity?
Maintain liquid level between 30% and 90% of total tank volume (18.75–56.25 L); exceeding 90% may impede pump inlet flow and reduce thermal homogeneity.
Are custom dimensions or voltage configurations available?
Yes — OEM modifications including 110 V / 60 Hz variants, extended depth tanks, and DIN-rail mounting kits are supported under CZGY’s engineering services agreement.