Jinhoo JH-S24 Triple-Well Digital Thermostatic Water (and Oil) Bath

Overview

The Jinhoo JH-S24 Triple-Well Digital Thermostatic Water (and Oil) Bath is an engineered solution for precise, stable thermal conditioning of samples across research laboratories, quality control environments, and industrial R&D settings. Designed around a robust Cu-heater + PID-controlled feedback loop architecture, the unit maintains consistent temperature distribution across three independent wells—each thermally isolated yet synchronized via shared microprocessor regulation. Unlike single-chamber baths, the triple-well configuration enables simultaneous processing of multiple sample types (e.g., enzymatic assays, dissolution testing, viscosity calibration standards) at identical or differential setpoints (via optional external probe routing), without cross-contamination risk. Its operational range spans from ambient +5 °C to 99 °C, supporting both aqueous media (water bath mode) and low-viscosity silicone oils (oil bath mode) up to 120 °C nominal—validated per IEC 61010-1:2010 for laboratory equipment safety.

Key Features

• Triple-well stainless steel chamber (304 grade) with seamless welds and electropolished finish—resistant to corrosion from saline solutions, buffer salts, and mild organic solvents.
• Microprocessor-based digital controller with 0.1 °C resolution, real-time display, and programmable timer (1 min to 99 h 59 min); supports auto-start and power-fail recovery.
• High-efficiency heating system featuring dual-zone copper-sheathed heaters and optimized fluid circulation geometry—ensuring ±0.2 °C temperature stability (measured per ASTM E1112-22 Annex A1 using calibrated Pt100 sensors).
• Integrated over-temperature protection: independent mechanical thermostat triggers audible alarm and visual LED warning when internal sensor exceeds user-defined limit by >2 °C; automatically cuts heater power.
• Modular footprint design: two standard external dimension variants accommodate benchtop integration in ISO/IEC 17025-accredited labs—570×270×260 mm (compact) and 750×400×300 mm (expanded well spacing).

Sample Compatibility & Compliance

The JH-S24 accommodates standard laboratory vessels including glass beakers (up to 1000 mL), centrifuge tubes (15–50 mL), reaction flasks (round-bottom, flat-bottom), and custom immersion fixtures. Each well accepts maximum immersion depth of 180 mm. The unit complies with GB/T 28026.1–2011 (Chinese national standard for thermostatic baths) and meets electromagnetic compatibility requirements per EN 61326-1:2013. While not FDA 21 CFR Part 11–certified out-of-box, its logging-capable controller supports audit-trail-ready data export (via RS232 interface) when integrated with validated LIMS or ELN systems under GLP/GMP frameworks.

Software & Data Management

The embedded controller logs temperature setpoint, actual reading, elapsed time, and alarm events internally for up to 30 days (circular buffer). Data export is supported via RS232 serial port (ASCII protocol) to PC-based acquisition software (e.g., LabVIEW-compatible drivers available upon request). Optional USB-to-RS232 adapter enables direct connection to Windows/Linux workstations. All logged parameters are timestamped with millisecond precision and retain traceability to NIST-traceable reference thermometers used during factory calibration—documentation provided in Certificate of Conformance (CoC).

Applications

• Pharmaceutical QC: Dissolution testing (USP Apparatus I/II water bath support), stability studies (ICH Q1A), and microbial growth incubation pre-conditioning.
• Life sciences: Enzyme kinetics assays requiring precise thermal ramping, DNA hybridization protocols, and cell culture reagent equilibration.
• Materials testing: Polymer melt index calibration baths, asphalt penetration testing (ASTM D5), and lubricant viscosity reference baths (ASTM D445).
• Environmental labs: BOD incubator pre-warming, COD digestion block support, and EPA Method 1664 extraction temperature control.

FAQ

Can the JH-S24 operate continuously for 72+ hours?
Yes—the unit is rated for continuous duty cycle under load (22 L water, 37 °C setpoint) with thermal shutdown redundancy and fan-cooled transformer design.
Is oil bath operation officially supported in the manual?
Yes—silicone oil (20–100 cSt) is explicitly approved; mineral oil use requires prior validation due to oxidation risk above 80 °C.
Does it support external temperature probe input for chamber monitoring?
Not natively; however, the RS232 interface allows third-party PT100 inputs via custom firmware update (contact technical support for OEM integration path).
What is the recalibration interval recommendation?
Annual verification against certified reference thermometer (±0.1 °C accuracy) is advised per ISO/IEC 17025 Clause 6.5.2; factory calibration certificate includes as-found/as-left data.
Are replacement parts like heater assemblies or control boards available?
Yes—Jinhoo provides 5-year spare parts availability guarantee; heater modules, PID controllers, and stainless steel well inserts are stocked in Guangdong warehouse.