Grant BTD Compact Microtube Dry Bath Incubator

Overview

The Grant BTD Compact Microtube Dry Bath Incubator is a precision-engineered metal block thermal platform designed for rapid, uniform, and stable heating of microcentrifuge tubes in molecular biology, clinical diagnostics, and pharmaceutical research laboratories. Unlike water baths, this dry bath eliminates contamination risk, condensation, and evaporation by employing direct conductive heating through an aluminum alloy heating block—ensuring reproducible thermal transfer without liquid medium interference. Its operating principle relies on Peltier-free resistive heating combined with PID-controlled feedback regulation, delivering high thermal stability (±0.1°C at 37°C) and spatial uniformity (±0.2°C across the block surface). The unit is optimized for routine applications requiring precise temperature maintenance between ambient +5°C and 100°C, with programmable setpoints from 25°C to 100°C—making it suitable for enzyme activation, DNA denaturation, sample thawing, and reagent pre-warming protocols.

Key Features

• PID-controlled digital temperature regulation ensures consistent thermal output and minimal overshoot during ramp-up or setpoint changes.
• Compact footprint (210 × 230 × 110 mm) and low-profile design enable seamless integration into crowded benchtop environments, including biosafety cabinets and laminar flow hoods.
• Universal interchangeable block configuration accommodates up to 49 microtubes simultaneously: 24 × 1.5/2.0 mL, 15 × 0.5 mL, and 10 × 0.2 mL—each seated in precisely machined, corrosion-resistant wells.
• Robust polypropylene housing provides chemical resistance, mechanical durability, and ease of decontamination using standard laboratory disinfectants (e.g., 70% ethanol, 10% bleach).
• Programmable timer supports durations from 1 minute to 96 hours, with automatic shut-off and audible alert upon completion—critical for unattended overnight incubations.
• Integrated thermal cut-out fuse delivers fail-safe over-temperature protection, complying with IEC 61010-1 safety requirements for laboratory electrical equipment.

Sample Compatibility & Compliance

The BTD dry bath is compatible with standard polypropylene and polyethylene microcentrifuge tubes (0.2 mL–2.0 mL), including PCR strips and individual tubes used in nucleic acid extraction, restriction digestion, and ligase reactions. It supports ISO/IEC 17025-compliant workflows when paired with external calibration verification (e.g., NIST-traceable thermocouple probes). While not intrinsically GLP/GMP-certified, its stable thermal performance, programmable logging-capable timer, and mechanical safety features align with foundational requirements for QC/QA environments under FDA 21 CFR Part 11–aligned documentation practices. The unit bears CE marking and conforms to EN 61010-1:2010+A1:2013 for electrical safety in laboratory use.

Software & Data Management

The BTD operates via an intuitive front-panel interface with LED display and tactile membrane keypad—no software installation or PC connectivity required. All operational parameters (setpoint, timer, status) are displayed in real time. Although the device lacks built-in data logging or USB/RS-232 interfaces, its predictable thermal response and repeatable timing allow integration into validated SOPs where manual entry into LIMS or ELN systems is standard practice. For laboratories requiring audit trails, external validation tools—including calibrated data loggers and independent temperature mapping—can be deployed per ASTM E2876-22 guidelines for thermal uniformity assessment.

Applications

• Routine warming of restriction enzymes, polymerases, and other thermolabile reagents prior to assay setup.
• Controlled thawing of cryopreserved cell suspensions or antibody stocks to minimize thermal shock.
• Pre-incubation of samples for ELISA, Western blotting, and immunoassay workflows requiring precise 37°C equilibration.
• Denaturation steps in PCR master mix preparation and cDNA synthesis protocols.
• Standardization of reaction temperatures across multiple users in shared core facilities—reducing inter-operator variability.

FAQ

Is the BTD compatible with PCR tubes and low-profile tube formats?
Yes—the machined block accepts standard 0.2 mL PCR tubes, including skirted and semi-skirted variants, as well as low-profile 0.5 mL and 1.5/2.0 mL microcentrifuge tubes.
Does the unit support calibration traceability?
The BTD does not include factory calibration certificates; however, its thermal performance can be verified using third-party NIST-traceable thermometers or digital probe loggers compliant with ISO/IEC 17025.
Can the timer be paused or reset during operation?
No—the timer runs continuously once initiated; interruption requires power cycling. For flexible timing needs, users should select appropriate preset durations before activation.
What maintenance is required for long-term reliability?
Routine cleaning of the block surface with lint-free wipes and isopropanol is recommended after each use. Avoid abrasive cleaners or immersion. Annual inspection of the thermal fuse and power cord integrity is advised for continuous-use environments.