HengAo HPT-80 Precision Heating Bath Thermostat

Overview

The HengAo HPT-80 Precision Heating Bath Thermostat is an engineered benchtop thermal management system designed for consistent, controllable heating of reaction vessels in analytical, synthetic, and quality control laboratories. Operating on resistive immersion heating combined with closed-loop PID temperature regulation, the HPT-80 maintains stable thermal conditions within a defined working volume—critical for applications requiring reproducible kinetic studies, solvent reflux, enzymatic assays, or viscosity measurements at elevated temperatures. Its compact footprint (350 × 470 × 85 mm) and 500 W heating capacity enable rapid thermal equilibration while minimizing energy consumption. Unlike open hot plates or non-circulating dry blocks, the HPT-80 utilizes a liquid bath medium (typically water or silicone oil) to deliver uniform heat transfer via conduction and natural convection—reducing thermal gradients that compromise experimental repeatability.

Key Features

• PID-controlled digital thermostat with real-time LED display for setpoint and actual bath temperature (resolution: 0.1 °C, accuracy: ±0.3 °C at 25–95 °C)
• Electronic programmable timer (0–999 min) enabling unattended operation and process termination upon completion
• Optimized internal chamber geometry and submerged heating element layout to ensure spatial temperature uniformity across standard vessel configurations
• Stainless steel bath tank with corrosion-resistant finish, compatible with water, glycerol, and low-viscosity silicone oils
• Over-temperature safety cutoff and auto-shutdown function compliant with IEC 61010-1 Class II electrical safety standards
• Benchtop design with non-slip rubber feet and rear cable management slot for integration into regulated lab environments

Sample Compatibility & Compliance

The HPT-80 accommodates a broad range of laboratory glassware and metal reaction vessels—including round-bottom flasks (50–1000 mL), test tubes, sample vials, and jacketed reactors—without requiring custom adapters. Its shallow bath depth (85 mm height) supports both partial and full immersion of vessel bases, facilitating compatibility with magnetic stirrers placed beneath the unit. From a regulatory standpoint, the device meets general-purpose laboratory equipment requirements under ISO/IEC 17025:2017 for equipment verification, and its temperature stability profile supports GLP-compliant thermal validation protocols. While not certified to FDA 21 CFR Part 11 out-of-the-box, audit trails for temperature setpoints and timer logs can be manually documented per internal SOPs during IQ/OQ qualification.

Software & Data Management

The HPT-80 operates as a standalone analog-digital hybrid instrument with no embedded firmware or network interface. All operational parameters—including temperature setpoint, ramp rate (manual adjustment only), hold time, and timer status—are controlled locally via tactile membrane buttons and displayed in real time. For laboratories requiring electronic data capture, optional external USB or RS-232 temperature loggers (e.g., Omega OM-EL-USB-TC) may be interfaced using industry-standard thermocouple inputs (Type K). Raw thermal data can be exported to CSV for post-processing in MATLAB, Python (NumPy/Pandas), or LIMS platforms. No proprietary software is required or bundled; configuration remains fully transparent and vendor-agnostic.

Applications

• Kinetic studies requiring precise thermal control during chemical synthesis or polymerization reactions
• Pre-heating and conditioning of samples prior to HPLC injection, rheological testing, or particle size analysis
• Maintaining constant temperature for enzyme activity assays, microbial growth media preparation, or DNA hybridization steps
• Supporting ASTM D445 (kinematic viscosity), ISO 3104, or USP dissolution apparatus auxiliary heating requirements
• Calibration warm-up staging for temperature-sensitive sensors, balances, and optical instrumentation
• Controlled drying of thin-film substrates or moisture-sensitive reagents in inert-atmosphere gloveboxes (when used with compatible bath fluids)

FAQ

What is the maximum operating temperature of the HPT-80?
The unit is rated for continuous operation up to 95 °C with water and up to 150 °C when using approved silicone oil bath fluids—subject to fluid-specific flash point and viscosity constraints.
Can the HPT-80 be used with a stirrer or circulator?
Yes—the flat, rigid base and open-top design allow placement of external magnetic stirrers underneath the bath or insertion of PTFE-coated stir bars directly into the bath fluid. Circulation pumps are not integrated but may be added externally via inlet/outlet ports (adapter kit required).
Is calibration documentation provided with the unit?
A factory calibration certificate (traceable to NIM, China) is available upon request and includes as-found/as-left temperature deviation data at three points (40 °C, 60 °C, 80 °C) per ISO/IEC 17025 guidelines.
How often should the bath fluid be replaced?
Water should be deionized and changed weekly in high-use settings; silicone oil requires replacement every 6–12 months depending on thermal cycling frequency and contamination exposure.
Does the HPT-80 support remote monitoring or Ethernet connectivity?
No—this is a local-control-only instrument. Remote functionality requires third-party data acquisition hardware and custom scripting.