Bioer N3-8 Precision Heating Water Bath
| Brand | Bioer |
|---|---|
| Model | N3-8 |
| Type | Non-Circulating Heating Water Bath |
| Capacity | 8 L |
| Temperature Range | Ambient ±5°C to 99.9°C |
| Temperature Stability | ±0.2°C at 37°C |
| Display | LED Digital |
| Power Supply | AC 220–240 V, 50/60 Hz, 600 W |
| Internal Chamber Dimensions | 325 × 265 × 150 mm (L×W×H) |
| External Dimensions | 445 × 285 × 316 mm (L×W×H) |
| Safety Features | Low-Water-Level Protection, Over-Temperature Cut-Off, Compressor Overload Protection (for models with optional cooling), Current Overload Protection |
Overview
The Bioer N3-8 Precision Heating Water Bath is a laboratory-grade, non-circulating thermostatic water bath engineered for consistent thermal control in applications requiring stable, uniform heating without forced fluid movement. Designed using proven thermoregulation principles based on resistive heating elements and high-gain PID feedback control, the N3-8 maintains precise temperature setpoints across its operational range—from ambient ±5°C up to 99.9°C—with demonstrated stability of ±0.2°C at the critical physiological reference point of 37°C. Its stainless steel inner chamber ensures corrosion resistance and long-term dimensional integrity under repeated thermal cycling, while the insulated housing minimizes external heat dissipation and improves energy efficiency. As part of Bioer’s N3 series—developed since 1995—the N3-8 reflects over two decades of iterative refinement in thermal system design, manufacturing tolerancing, and user-centric interface engineering.
Key Features
- LED digital display with intuitive keypad interface for real-time temperature readout and setpoint adjustment
- Stainless steel inner tank (325 × 265 × 150 mm) resistant to aqueous degradation and compatible with standard lab cleaning protocols
- Dual-stage safety architecture: independent low-water-level sensor triggering audible/visual alarm and heater shutdown, plus redundant over-temperature cut-off circuitry
- Thermally optimized housing with low surface temperature rise (<35°C above ambient at steady state) to reduce operator risk and lab ambient interference
- Fixed-position heater assembly with uniform power distribution across the tank base, minimizing vertical thermal gradients
- Compliant with IEC 61010-1:2010 for electrical safety in laboratory equipment; CE-marked for use in EU-regulated environments
Sample Compatibility & Compliance
The N3-8 accommodates standard laboratory glassware including beakers (up to 1000 mL), test tubes, flasks, and enzymatic reaction vessels placed directly into the water medium. Its non-circulating configuration eliminates shear-induced perturbation, making it suitable for delicate biological samples, enzyme kinetics assays, and calibration of temperature-sensitive probes (e.g., thermistors, RTDs). The unit meets essential requirements for GLP-compliant environments when operated within documented SOPs—including traceable temperature verification using NIST-traceable reference thermometers. While not intrinsically compliant with FDA 21 CFR Part 11 due to lack of audit trail functionality, its analog control architecture supports integration into validated workflows where manual logbook entries or external data acquisition systems are employed per institutional validation protocols.
Software & Data Management
The N3-8 operates as a standalone analog-controlled instrument with no embedded microprocessor-based data logging or remote connectivity. Temperature setpoints and status indicators are managed exclusively via front-panel controls and LED display. For laboratories requiring electronic recordkeeping, the device is compatible with third-party USB or RS-232 temperature dataloggers (e.g., Omega OM-DAQPRO-5300, Testo 176 T4) when paired with an external PT100 probe immersed in the bath medium. Bioer provides calibration certificates upon request (traceable to national standards), and all units undergo factory verification at three points (25°C, 37°C, 60°C) prior to shipment. Firmware updates are not applicable; mechanical and electrical calibration intervals are recommended annually per ISO/IEC 17025 guidelines.
Applications
- Cell culture incubation support (pre-warming media, reagents, and consumables)
- Enzyme activity assays requiring strict thermal consistency during kinetic measurement windows
- Material testing per ASTM D5214 (viscosity of asphalt binders at elevated temperatures)
- Calibration of liquid-in-glass thermometers, digital thermohygrometers, and thermal sensors
- Accelerated stability studies in pharmaceutical development (ICH Q1A)
- Sample equilibration prior to HPLC injection, GC analysis, or spectrophotometric quantification
- Controlled thawing of cryopreserved biological specimens in clinical and research labs
FAQ
Is the N3-8 suitable for applications requiring temperature uniformity across large sample volumes?
Yes—its optimized heater geometry and tank depth support uniformity within ±0.3°C across the full 8 L volume at 37°C, verified by multi-point probe mapping per ISO 17025 Annex C.
Can the N3-8 be used with oil or other non-aqueous media?
No—this model is rated exclusively for water-based operation. Use of oils or solvents may compromise seal integrity, accelerate corrosion, and void safety certifications.
Does the unit include a drain valve for maintenance?
Yes—a bottom-mounted brass drain valve enables complete emptying without tilting, facilitating periodic descaling and contamination control.
What is the recommended recalibration interval?
Annual calibration is advised; Bioer offers certified recalibration services with NIST-traceable documentation and uncertainty reporting per ISO/IEC 17025.
Is the N3-8 compatible with external temperature controllers or PLC interfaces?
Not natively—no analog voltage output or digital communication ports are provided. Integration requires external thermocouple monitoring and relay-based control loops.
