TouchScience BTH-10 Adsorption Tube Aging Instrument
| Brand | TouchScience |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | BTH-10 |
| Temperature Control Range | Ambient to 380 °C |
| Gas Flow Rate | 0–1000 mL/min |
| Tube Capacity | 10 tubes |
| Power Supply | 220 VAC, 50 Hz |
| Power Consumption | <300 VA |
| Tube Length Compatibility | Standard 89 mm (customizable) |
| Dimensions (H×W×D) | 225 mm × 265 mm × 345 mm |
Overview
The TouchScience BTH-10 Adsorption Tube Aging Instrument is a dedicated thermal conditioning system engineered for the controlled regeneration and preconditioning of sorbent-packed adsorption tubes used in thermal desorption–gas chromatography (TD–GC) workflows. It operates on the principle of programmed resistive heating under inert gas purging, enabling precise removal of residual contaminants, moisture, and volatile organic compounds from sorbent beds prior to sampling or calibration. Unlike generic ovens or benchtop furnaces, the BTH-10 integrates thermally isolated individual tube zones with real-time gas flow regulation—ensuring uniform thermal exposure and reproducible activation conditions across all 10 tube positions. This instrument is not a standalone analytical device but a critical pre-analytical module designed to maintain trace-level integrity in volatile organic compound (VOC) and semi-volatile organic compound (SVOC) monitoring applications compliant with EPA Method TO-17, ISO 16017-1, and ASTM D6196.
Key Features
- Independent temperature control per tube position—eliminates need for external temperature controllers or multi-zone oven setups
- Simultaneous aging of 1–10 standard 89 mm adsorption tubes (e.g., Tenax TA, Carbopack B/C, Carboxen 1000), with optional length customization available upon request
- Integrated mass-flow–calibrated rotameter with visual scale (0–1000 mL/min range), supporting both nitrogen and helium purge gases
- Digital timer with audible alert function—enables unattended operation and prevents over-aging or thermal degradation of sorbents
- Compact footprint (225 × 265 × 345 mm) optimized for laboratory benchtop integration without compromising thermal stability or airflow uniformity
- Low-power design (<300 VA) with fail-safe thermal cutoff and insulated housing meeting IEC 61010-1 safety requirements for laboratory equipment
Sample Compatibility & Compliance
The BTH-10 accommodates industry-standard 6 mm OD stainless steel or glass adsorption tubes, including those conforming to ASTM D6196 Annex A1 specifications. Its calibrated gas delivery system ensures consistent linear velocity across all tube positions, minimizing channeling effects and promoting uniform desorption of surface-bound species. The instrument supports GLP-compliant documentation when paired with external logging systems; while it does not include built-in electronic audit trails, its analog timer and mechanical flow control are fully compatible with 21 CFR Part 11–compliant data acquisition platforms via external relay interfaces. All thermal profiles meet the minimum aging criteria specified in EPA TO-17 Section 6.3.2 (minimum 30 min at ≥250 °C under inert flow) and ISO 16017-1 Clause 7.2 (pre-conditioning at manufacturer-recommended temperature for ≥2 h).
Software & Data Management
The BTH-10 is a hardware-only platform with no embedded firmware, touchscreen interface, or proprietary software. Temperature setpoints and timing parameters are configured manually via front-panel dials and mechanical controls—ensuring long-term operational reliability, immunity to software obsolescence, and full compatibility with laboratory-wide instrument management systems. Users may record aging logs manually or integrate the unit into LIMS environments using external USB/RS-232 data loggers connected to the timer’s dry-contact output. No driver installation or vendor-specific licensing is required, simplifying validation and reducing IT compliance overhead in regulated QC/QA laboratories.
Applications
- Pre-use activation of sorbent tubes prior to indoor air, workplace, or ambient VOC sampling campaigns
- Regeneration of spent tubes between sequential analyses to extend sorbent service life and reduce consumable costs
- Method development support for TD–GC–MS quantification of C2–C12 hydrocarbons, aldehydes, and halogenated organics
- Calibration standard preparation where blank integrity must be verified per ISO/IEC 17025 clause 7.7.1
- Compliance testing labs performing accredited analyses under CNAS, UKAS, or DAkkS scopes referencing ISO 16017 or EPA TO-17
FAQ
Can the BTH-10 accommodate tubes longer than 89 mm?
Yes—custom-length tube holders are available upon request; maximum supported length is 120 mm with modified heater block geometry.
Is the flow rate digitally controlled or manually adjusted?
Gas flow is regulated via a precision needle valve and monitored using a calibrated glass-tube rotameter; no digital mass flow controller (MFC) is integrated.
Does the instrument support ramp-and-soak temperature programming?
No—the BTH-10 provides only single-setpoint temperature control; multi-step thermal profiles require external programmable controllers interfaced via optional relay outputs.
What maintenance is required for long-term accuracy?
Annual verification of temperature uniformity across all 10 zones using NIST-traceable probe thermometers is recommended; flowmeter calibration should be performed every 24 months per ISO 8503-2 guidelines.
