HSS-1 Digital Super Constant-Temperature Bath
| Origin | Zhejiang, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (PRC) |
| Model | HSS-1 |
| Price Range | USD 1,400 – 2,800 |
| Instrument Type | Constant-Temperature Bath |
| Circulation Mode | Internal Recirculation Only |
| Temperature Range | Ambient (RT) to 95 °C |
| Temperature Uniformity | ±0.5 °C |
| Bath Chamber Dimensions | 240 × 170 × 160 mm (L × W × H) |
| Bath Depth | 160 mm |
| Circulation Flow Rate | 6 L/min (Stainless Steel Pump) |
Overview
The HSS-1 Digital Super Constant-Temperature Bath is a precision-engineered laboratory thermal control system designed for stable, uniform, and reproducible temperature maintenance in liquid media—primarily water or silicone oil—within open or semi-closed bath configurations. It operates on the principle of active thermal regulation via PID-controlled far-infrared heating elements combined with high-efficiency stainless steel circulation pumping. Unlike passive heating blocks or basic water baths, the HSS-1 integrates dual-integration high-precision A/D conversion circuitry and low-drift operational amplifiers into its temperature feedback loop, enabling sub-degree stability and rapid thermal equilibration. Its chamber geometry (240 × 170 × 160 mm) supports standard-sized flasks, condensers, and immersion probes while accommodating common analytical workflows such as solvent reflux, enzymatic incubation, calibration of temperature-sensitive sensors, and controlled-rate drying of hygroscopic samples.
Key Features
- High-stability digital temperature controller with LED display offering real-time resolution of 0.1 °C across a usable range from ambient (RT) to 95 °C
- Far-infrared heating module engineered for uniform radiant energy distribution and minimized thermal overshoot during setpoint transitions
- Stainless steel (304 grade) bath tank and pump housing ensuring long-term corrosion resistance against aqueous and mildly organic media
- Integrated magnetic stirring mechanism (optional configuration) to enhance convective heat transfer and reduce localized thermal gradients
- Internal recirculation system delivering consistent 6 L/min flow rate—optimized for thermal homogeneity without external plumbing requirements
- Robust mechanical construction using precision-machined components and seamless welding techniques to prevent leakage and extend service life under continuous operation
Sample Compatibility & Compliance
The HSS-1 accommodates a broad spectrum of sample containers—including glass Erlenmeyer flasks (up to 2 L), jacketed reactors, viscometer spindles, and calibration thermometers—provided they remain fully immersed within the 160 mm working depth. It is compatible with water, ethylene glycol–water mixtures, and silicone oils rated for temperatures up to 95 °C. While not certified for Class I Div 1 hazardous locations, the unit complies with general-purpose electrical safety standards applicable to laboratory-grade equipment (IEC 61010-1:2010). Its temperature performance aligns with ASTM E2251-22 requirements for liquid-bath temperature uniformity verification and supports GLP-compliant documentation when paired with external data loggers meeting FDA 21 CFR Part 11 audit-trail specifications.
Software & Data Management
The HSS-1 operates as a standalone analog-digital hybrid instrument with no embedded firmware-based data logging or USB/Ethernet connectivity. However, its analog voltage output (0–5 V or 4–20 mA, configurable per OEM specification) enables integration with third-party SCADA systems, programmable logic controllers (PLCs), or PC-based acquisition platforms such as LabVIEW or MATLAB. Users may implement time-stamped temperature trending, alarm-triggered notifications, and automated ramp/soak profiles by coupling the bath with external controllers. For regulatory environments requiring electronic records, validated external data loggers with NIST-traceable calibration certificates are recommended to fulfill ALCOA+ data integrity principles.
Applications
- Controlled-temperature solvent evaporation and rotary evaporation pre-heating stages
- Thermal conditioning of reference standards prior to metrological calibration (e.g., thermometer, RTD, or thermocouple verification)
- Accelerated stability testing of pharmaceutical excipients under ISO 14644-1 Class 7 cleanroom-compatible benchtop conditions
- Enzyme kinetics assays requiring precise thermal hold at 37 °C, 45 °C, or 60 °C for defined durations
- Drying and curing of thin-film coatings where surface temperature must remain within ±0.5 °C over extended periods
- Supporting ASTM D97, D445, and ISO 3104 viscosity measurements by maintaining constant bath temperature for capillary viscometers
FAQ
Does the HSS-1 support external temperature probe input for cascade control?
No—the HSS-1 relies exclusively on its built-in PT100 sensor located near the bath center; it does not accept external reference inputs.
Can the internal circulation pump be disabled for static bath operation?
Yes—pump activation is manually controlled via front-panel toggle switch, allowing true static-mode use when required.
Is the unit suitable for oil baths above 60 °C?
Yes—when filled with appropriate high-flashpoint silicone oil (e.g., Dow Corning 200 Fluid, flash point >200 °C), the HSS-1 maintains stable operation up to its maximum setpoint of 95 °C.
What maintenance intervals are recommended for long-term reliability?
Biannual inspection of pump impeller clearance, annual descaling (if used with hard water), and quarterly verification of temperature uniformity per ASTM E2251 are advised.
Does the HSS-1 meet CE or UKCA marking requirements?
As supplied by the distributor, the unit carries CE marking compliant with the Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU); UKCA marking requires additional conformity assessment by an appointed UK-based Notified Body.
