Constant-temperature Drying Oven BJPX-HDO Series
Constant-temperature drying oven series with bottom heating and natural convection, offering precise temperature control from RT+10°C to 250°C across multiple capacity options for laboratory sample processing.
| Automation Level | semi-automated |
| BJPX-HDO55 | BJPX-HDO72 |
| BJPX-HDO138 | BJPX-HDO270 |
| 55L | 72L |
| 138L | 270L |
| Temp. Range | RT+10℃~250℃ |
The BJPX-HDO Series constant-temperature drying oven provides precise thermal processing for laboratory samples requiring controlled dehydration, sterilization, or thermal treatment. This bottom-heated convection system maintains temperature uniformity within ±3% of maximum temperature across the chamber, with fluctuation control to ±1°C for consistent sample processing.
Available in four capacity configurations (43L, 55L, 72L, 138L, 270L), the series accommodates varying sample volumes while maintaining temperature range from ambient +10°C to 250°C with 0.1°C resolution. The LCD display provides real-time monitoring of temperature and timing parameters, with programmable operation from 1 minute to 9999 hours or continuous running for extended protocols.
How It Works
The BJPX-HDO series operates on bottom heating with natural convection principles to achieve uniform temperature distribution throughout the chamber. Heat generated from the bottom heating element creates thermal gradients that drive natural air circulation, eliminating hot spots and ensuring consistent sample treatment across all shelf positions.
Temperature control utilizes precision sensing with 0.1°C resolution and maintains chamber conditions within ±1°C fluctuation through automated heating element cycling. The natural convection design prevents forced air circulation that could disturb lightweight samples while maintaining temperature uniformity within ±3% of the maximum set temperature.
The LCD display system continuously monitors and displays actual temperature alongside programmed parameters, with timing functions supporting both fixed-duration protocols (1-9999 minutes or hours) and continuous operation modes for extended processing requirements.
Features & Benefits
Automation Level
- semi-automated
BJPX-HDO55
- BJPX-HDO72
BJPX-HDO138
- BJPX-HDO270
55L
- 72L
138L
- 270L
Temp. Range
- RT+10℃~250℃
Temp. Resolution
- 0.1℃
Temp. Fluctuation
- ±1℃
Temp. Uniformity
- ≤Max temp.±3％
Heating Method
- Bottom heating, natural convection
Timing Range
- 1~9999min/h or continuous
Standard Accessories
- Shelf
Optional Accessories
- Shelf, USB port, printer
Brand
- ConductScience
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Materials Science
- Microbiology
- Pharmaceutical QC
Capacity
- 43L
Display Type
- LCD display
Weight
- 35.0 kg
Dimensions
- L: 33.5 mm
- W: 36.8 mm
- H: 35.0 mm
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Temperature Range | RT+10°C to 250°C with 0.1°C resolution | Many entry-level units offer narrower ranges or lower resolution | Wide temperature range accommodates diverse thermal processing applications from gentle drying to sterilization temperatures |
| Temperature Uniformity | ≤Max temp. ±3% throughout chamber | Basic models often have wider temperature variations | Consistent thermal treatment ensures reproducible results across all sample positions |
| Capacity Options | Five models from 43L to 270L | Limited size offerings in many product lines | Scalable capacity selection matches laboratory throughput requirements without overinvestment in unused space |
| Temperature Fluctuation Control | ±1°C temperature stability | Entry-level models may have ±3-5°C fluctuation | Precise temperature control meets requirements of analytical methods requiring stable thermal conditions |
| Data Documentation | Optional USB port and printer accessories | Many basic units lack data logging capabilities | Enables process documentation for quality assurance and regulatory compliance applications |
| Timing Flexibility | 1-9999 minutes/hours plus continuous operation | Some models have limited timing ranges | Accommodates both quick processing and extended thermal treatment protocols in a single instrument |
The BJPX-HDO series provides precise temperature control with natural convection heating across multiple capacity options. The combination of wide temperature range, excellent uniformity specifications, and optional data logging capabilities addresses requirements for both routine laboratory drying and analytical applications requiring documented thermal processing.
Practical Tips
Perform temperature verification at multiple shelf positions using calibrated thermometers before critical analyses.
Why: Verifies temperature uniformity specifications are maintained and identifies any potential hot or cold spots in the chamber.
Allow adequate space between samples for natural air circulation and avoid overloading shelves.
Why: Natural convection relies on thermal-driven air movement, which can be impeded by overcrowded sample arrangements.
Clean chamber walls and shelves regularly to remove sample residues that could affect heat distribution.
Why: Accumulated residues can create local hot spots and compromise temperature uniformity across the chamber.
Use the optional data logging features for processes requiring documentation of thermal history.
Why: Documented thermal profiles provide evidence of proper processing conditions for quality assurance and regulatory compliance.
Allow the chamber to cool to safe handling temperature before removing samples, especially after high-temperature processing.
Why: Chamber surfaces and sample containers retain heat after processing cycles, presenting burn hazards during sample retrieval.
If temperature uniformity degrades, check for blocked air circulation paths and ensure proper shelf spacing.
Why: Natural convection patterns can be disrupted by poor loading practices or accumulated debris affecting air flow.
Preheat the chamber to process temperature before loading time-sensitive samples.
Why: Eliminates temperature ramp-up time from the actual processing period for more accurate timing control.
Schedule periodic calibration verification according to your laboratory's quality system requirements.
Why: Regular verification maintains measurement traceability and ensures continued compliance with analytical method specifications.
Setup Guide
What’s in the Box
- BJPX-HDO drying oven main unit
- Adjustable shelves (standard configuration)
- Power cord
- User manual and documentation
- Warranty certificate (typical)
Warranty
ConductScience provides a standard one-year manufacturer warranty covering parts and labor, with technical support for installation guidance and operational troubleshooting.
Compliance
What is the temperature uniformity specification and how does it affect sample processing consistency?
Temperature uniformity is specified as ≤Max temp. ±3%, meaning temperature variation across the chamber is within 3% of the maximum set temperature. This ensures consistent thermal treatment of all samples regardless of shelf position, critical for reproducible results in batch processing applications.
Can the timing function accommodate both short-term drying and extended thermal processing protocols?
Yes, the timing range spans from 1 minute up to 9999 hours, plus continuous operation mode. This flexibility supports quick moisture removal procedures as well as extended thermal stability studies or sterilization cycles requiring days of controlled heating.
How does the bottom heating with natural convection compare to forced convection systems?
Natural convection provides gentler air movement that won't disturb lightweight samples or powders, while still achieving good temperature uniformity through thermal-driven circulation. This is preferable for applications where sample disturbance must be minimized, though heating rates may be slower than forced convection systems.
What capacity should I select for my laboratory's typical sample volumes?
Capacity selection depends on simultaneous sample throughput needs. The 43L model suits small research labs processing individual samples, while 138-270L models accommodate high-throughput environments processing multiple sample batches or large containers concurrently.
Can the unit maintain stable temperatures for analytical methods requiring specific thermal conditions?
Yes, with ±1°C temperature fluctuation control and 0.1°C resolution, the system meets the stability requirements of most analytical methods. The LCD display provides continuous monitoring to verify conditions throughout the analysis period.
Are there data logging capabilities for documentation and quality assurance?
Optional USB port and printer accessories enable data logging and documentation of thermal processing cycles. This supports quality assurance requirements and regulatory compliance in validated laboratory environments.
What maintenance procedures are required to maintain temperature accuracy?
Regular temperature calibration verification using certified reference thermometers is recommended. Chamber cleaning and shelf maintenance ensure proper air circulation, while inspection of heating elements and temperature sensors maintains system reliability.
Can the oven handle samples requiring inert atmosphere or vacuum conditions?
The standard BJPX-HDO series operates at atmospheric pressure with natural convection. For inert atmosphere or vacuum applications, consult product datasheet for specialized configurations or consider alternative vacuum oven models.
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