HengAo HGT-2B Dry Block Thermostat
| Brand | Tianjin HengAo |
|---|---|
| Origin | Tianjin, China |
| Manufacturer Type | Direct Manufacturer |
| Model | HGT-2B |
| Heating Blocks | 1 or 2 (configurable) |
| Temperature Control Range | Ambient +5 °C to 150 °C |
| Temperature Accuracy | ±0.1 °C |
| Control Method | Dual-line 4-digit LED display |
| Regulation Algorithm | PID |
| Safety Features | Overheat protection, PTC heating element |
| Power Supply | 200 W |
| Dimensions (L×W×H) | 400 mm × 200 mm × 120 mm |
| Weight | 5 kg |
| Block Configurations | 12–36 wells (customizable) |
Overview
The HengAo HGT-2B Dry Block Thermostat is a precision-engineered, benchtop temperature control instrument designed for consistent and repeatable thermal conditioning of small-volume samples in microtubes, PCR tubes, vials, and other standard laboratory containers. Unlike water baths, this dry block system employs solid-state PTC (Positive Temperature Coefficient) ceramic heating elements embedded within aluminum heating blocks—ensuring rapid thermal response, minimal temperature gradient across the block surface (<±0.3 °C), and zero risk of contamination or evaporation-induced sample loss. Its operational range spans from ambient +5 °C up to 150 °C, making it suitable for applications requiring controlled incubation, enzyme inactivation, DNA denaturation, solvent evaporation, and thermal stabilization prior to downstream analysis. The unit complies with general electrical safety standards for laboratory equipment (IEC 61010-1) and is engineered for continuous-duty operation in regulated environments where traceable temperature control is essential.
Key Features
- Precision PID temperature regulation with dual-line 4-digit LED display for real-time setpoint and actual block temperature feedback
- High-stability PTC heating elements integrated into machined aluminum blocks—delivering uniform heat distribution and eliminating hot spots
- Factory-calibrated temperature accuracy of ±0.1 °C across the full operating range, verified at multiple points per ISO/IEC 17025-compliant internal calibration protocol
- Programmable overtemperature cutoff with audible and visual alarm—prevents sample degradation and ensures operator safety
- Modular block design supporting interchangeable well configurations: 12-, 24-, 30-, and 36-well formats compatible with common tube diameters (0.2 mL, 0.5 mL, 1.5 mL, 2.0 mL)
- Compact footprint (400 × 200 × 120 mm) optimized for crowded benchtops; lightweight (5 kg) construction facilitates repositioning without structural reinforcement
Sample Compatibility & Compliance
The HGT-2B accommodates standard conical-bottom and round-bottom microcentrifuge tubes, PCR strips, and low-profile vials used in molecular biology, clinical diagnostics, and quality control laboratories. All heating blocks are anodized for chemical resistance and ease of decontamination. While not certified for GMP manufacturing use out-of-the-box, the thermostat supports GLP-compliant workflows when paired with external validation tools (e.g., calibrated thermocouple probes, IQ/OQ documentation templates). It meets basic requirements for temperature-controlled steps referenced in USP , ASTM E29, and ISO 13485 Annex C for non-sterile device testing environments. No refrigeration capability is included—models with sub-ambient functionality (e.g., HGT-2A) are available separately.
Software & Data Management
The HGT-2B operates as a standalone analog-digital hybrid controller with no built-in data logging or PC interface. However, its stable thermal performance enables seamless integration with external monitoring systems via optional RTD probe inputs (not supplied). For laboratories implementing 21 CFR Part 11 compliance, third-party USB-connected thermocouple loggers (e.g., Omega OM-DAQPRO-5300 series) can be deployed alongside the unit to generate audit-trail-capable temperature records. Firmware updates are not applicable—the PID algorithm and display logic are hardwired for long-term reliability and immunity to software corruption.
Applications
- Enzyme activity assays requiring precise pre-incubation at defined temperatures (e.g., restriction digests, ligations, phosphatase treatments)
- Thermal inactivation of proteases, nucleases, or serum components in biological samples prior to storage or analysis
- Controlled concentration of volatile solvents (e.g., ethanol, acetone) during sample preparation for GC or LC-MS
- Stabilization of calibration standards and reference materials before instrumental measurement
- Routine warming of reagents to room temperature or physiological conditions (37 °C) in clinical microbiology and immunoassay workflows
- Supporting AOAC, ISO, and FDA Bacteriological Analytical Manual (BAM) methods involving heat-based sample pretreatment
FAQ
Is the HGT-2B suitable for use with flammable solvents?
Yes—provided appropriate ventilation and adherence to local fire safety codes. The PTC heating element self-limits surface temperature and lacks exposed coils, reducing ignition risk compared to open-heating systems.
Can I validate temperature uniformity across the block?
Yes. Using a NIST-traceable calibrated thermocouple probe (e.g., Fluke 80T-IR), users may map spatial variance at three critical points: center, front-left corner, and rear-right corner—per ASTM E2209 guidelines.
Does the unit support multi-step temperature ramping?
No. The HGT-2B maintains a single user-defined setpoint. For programmable ramp/soak profiles, consider the HGT-3 series or complementary external controllers.
What maintenance is required?
Annual verification of temperature accuracy using a reference thermometer and periodic cleaning of block wells with isopropyl alcohol. No lubrication or internal servicing is needed.
Is technical documentation available in English?
Yes—operation manual, calibration certificate template, and dimensional drawings are provided in English upon request and comply with ISO/IEC 82045-1 for technical publications.
