Pascor SBH/2 & SBH/3 Safety Shield for Dry Bath Heaters

Overview

The Pascor SBH/2 and SBH/3 Safety Shields are precision-engineered transparent protective covers designed exclusively for laboratory dry bath heaters—specifically those equipped with two (SBH/2) or three (SBH/3) independently heated blocks, including dual-zone temperature-controlled configurations. Constructed from high-grade PLEXIGLAS® (polymethyl methacrylate, PMMA), these shields operate on a passive safety principle: they serve as a physical barrier without interfering with thermal conduction or airflow dynamics around the heating blocks. Unlike opaque metal lids that may trap excessive heat or distort temperature gradients, the optical-grade PMMA material provides full visual monitoring while minimizing convective heat loss—thereby contributing to improved thermal stability across sample wells. The design adheres to fundamental ergonomic and risk-assessment principles outlined in ISO 13857 (safety distances to prevent hazard zone access) and supports compliance with laboratory safety management systems per ISO/IEC 17025:2017 Clause 8.4 (handling of hazards).

Key Features

• Optically clear, impact-resistant PLEXIGLAS® construction ensures unobstructed visual observation of samples during operation without compromising structural integrity.
• Tool-free, snap-fit mounting system enables rapid installation and removal—compatible only with designated Pascor dry bath platforms (SBH series) and certified third-party units meeting dimensional tolerances.
• Integrated edge-sealing geometry minimizes lateral air exchange above heating blocks, reducing ambient-induced temperature fluctuations by up to 0.3 °C under steady-state conditions (validated at 95 °C setpoint, ambient 22 °C).
• Non-porous surface resists chemical fogging from common solvents (e.g., ethanol, acetone, isopropanol) and withstands repeated decontamination using 70% isopropyl alcohol wipes—fully compliant with CLSI GP26-A4 surface cleaning guidelines.
• Static-dissipative formulation prevents electrostatic accumulation, mitigating risks associated with volatile organic solvent handling near heated surfaces.

Sample Compatibility & Compliance

These shields are validated for use with standard 0.2–50 mL tube formats (including PCR strips, microcentrifuge tubes, and culture vials) placed directly into Pascor SBH-series heating blocks. They do not accommodate oversized containers or non-standard block geometries. From a regulatory standpoint, the SBH/2 and SBH/3 meet mechanical safety requirements under EN 61010-1:2010+A1:2019 (Safety requirements for electrical equipment for measurement, control, and laboratory use). Their use supports adherence to institutional biosafety level (BSL-1/BSL-2) operational protocols when handling low-to-moderate risk biological samples, particularly where splash containment and operator hand protection are mandated.

Software & Data Management

As a purely mechanical accessory, the SBH/2 and SBH/3 shields require no firmware, drivers, or software integration. However, their deployment is fully compatible with Pascor’s optional SBH-Link™ data logging interface (sold separately), which records real-time block temperatures and alarm events. When used in GLP- or GMP-regulated environments, shield usage must be documented in equipment logbooks per FDA 21 CFR Part 11 Annex 11 requirements—particularly where temperature uniformity validation (e.g., ASTM E2208-19) includes assessment of cover-induced thermal effects.

Applications

• Enzymatic reaction incubation requiring stable thermal profiles (e.g., restriction digests, ligations, RT-PCR setup).
• Sample pre-warming prior to HPLC injection or mass spectrometry analysis to minimize thermal shock-induced analyte degradation.
• Controlled evaporation steps in sample preparation workflows involving volatile solvents (e.g., nitrogen blow-down alternatives).
• Teaching laboratories implementing OSHA-aligned safety curricula for undergraduate chemistry and molecular biology instruction.
• QC/QA labs performing temperature mapping studies per USP and ISO/IEC 17025 clause 7.8.2.

FAQ

Can the SBH/3 shield be used on a dual-block dry bath?
No—SBH/3 is dimensionally optimized for triple-block configurations and dual-zone units; using it on a dual-block system compromises sealing integrity and thermal performance.
Is autoclaving supported?
No—PLEXIGLAS® softens above 80 °C and is incompatible with steam sterilization cycles. Surface disinfection only, per manufacturer-recommended agents.
Does the shield affect calibration validity?
Yes—any permanent change to heater configuration (including shield installation) requires revalidation of temperature uniformity and accuracy per your lab’s SOPs and relevant standards (e.g., ISO/IEC 17025 Clause 7.8.3).
Are replacement parts available?
Yes—individual shield panels, retention clips, and alignment gaskets are stocked under Pascor part numbers SBH-SHLD-PMMA-2 and SBH-SHLD-PMMA-3, with traceable batch documentation.
Can custom engraving be applied for lab identification?
Yes—laser marking is permitted on the non-optical lower rim using CO₂ lasers operating below 1.5 W average power, provided no ablation penetrates beyond 0.1 mm depth.