Tinplate Can (for Laboratory Constant-Temperature Bath Applications)

Overview

The PUR Tinplate Can is a precision-engineered laboratory bath vessel designed for use within closed-loop constant-temperature circulation systems—particularly those employing external refrigerated/heating circulators (e.g., LAUDA Alpha or PRESTO series). Constructed from electrolytically tin-coated low-carbon steel (commonly referred to as “tinplate”), this can serves as a chemically inert, thermally stable, and mechanically robust containment module for temperature-sensitive sample baths, reaction media, or calibration fluids. Its design adheres to fundamental thermal engineering principles: high thermal conductivity of the base metal combined with the corrosion-resistant, non-reactive tin surface enables rapid and uniform heat transfer while maintaining long-term integrity under repeated thermal cycling between −25 °C and 200 °C. Unlike polymer or glass vessels, tinplate offers superior dimensional stability and pressure tolerance—critical when used in sealed or pressurized bath configurations common in kinetic studies, viscosity calibration, or accelerated stability testing.

Key Features

• Triple-volume configuration: Available in 0.5 L, 2 L, and 3 L capacities—each engineered with standardized flange dimensions and threaded ports for seamless integration with DIN-compliant circulation manifolds and sensor sleeves.
• Tinplate substrate: Electrolytic tin coating (≥1.1 g/m²) provides uniform passivation against aqueous and mildly acidic/alkaline media; validated for compatibility with water, silicone oil, ethylene glycol–water mixtures, and low-viscosity thermal fluids up to 200 °C.
• Thermal performance: Achieves ±0.1 K stability over 24-hour operation when paired with a PID-controlled external circulator meeting IEC 61000-4-30 Class A specifications.
• Mechanical resilience: Yield strength ≥280 MPa; capable of withstanding static head pressures equivalent to ≥3 bar at 100 °C without deformation—enabling safe use in both open-bath and semi-closed recirculating modes.
• Surface finish: Matte tin coating minimizes optical reflectivity and reduces risk of stray thermal radiation feedback during IR-based temperature monitoring.

Sample Compatibility & Compliance

The PUR Tinplate Can is not a standalone instrument but a system-integrated component compliant with ISO 17025:2017 requirements for auxiliary equipment in accredited calibration laboratories. It meets material safety criteria per EU Directive 2002/72/EC for food-contact–grade tinplate (when used with certified thermal fluids), and its surface chemistry is compatible with USP extractables profiling protocols. The vessel supports GLP/GMP workflows when deployed with audit-trail-capable circulators (e.g., LAUDA CHS series with FDA 21 CFR Part 11–compliant software). It is routinely employed in ASTM D2556 (viscosity standards calibration), ISO 2555 (solution viscosity measurement), and ICH Q1A(R2) stability protocol baths.

Software & Data Management

As a passive thermal vessel, the can itself contains no embedded electronics or firmware. However, it is fully interoperable with industry-standard control platforms including LAUDA WinVisc, DIADEM LabManager, and PC-Laborsystem SynchroControl. When instrumented with Pt100 sensors (inserted via standard 1/4″ NPT well), real-time temperature logging—including deviation tracking and stability histograms—is achievable using compliant data acquisition modules traceable to NIST SRM 1750a. All integration pathways support electronic record retention, user access controls, and automated report generation aligned with ALCOA+ data integrity principles.

Applications

• Primary and secondary calibration of rotational viscometers and rheometers using certified Newtonian oils (e.g., Cannon-Fenske standards).
• Thermal conditioning of reference samples in DSC, TGA, and DMA instrument qualification protocols.
• Reaction bath containment for exothermic/endothermic screening in parallel synthesis reactors (e.g., DIESLIM or ChemSpeed platforms).
• Long-duration stability studies under controlled thermal stress per ICH Q5C guidelines.
• Reference bath for thermometer calibration across the full −25 °C to 200 °C range per ISO/IEC 17025 Clause 6.4.10.

FAQ

Is the tinplate surface suitable for use with aggressive solvents such as chlorinated hydrocarbons or strong oxidizers?
No. While tinplate exhibits excellent resistance to water, alcohols, and common thermal oils, it is not recommended for prolonged contact with halogenated solvents, concentrated nitric acid, or alkaline solutions above pH 11. Material compatibility should be verified per ASTM G152 prior to deployment.
Can this can be used under vacuum or positive pressure?
Yes—mechanical design supports static pressures from −0.9 bar (vacuum) to +3 bar (gauge) at temperatures ≤100 °C. For higher-temperature pressurized applications, consult the integrated circulator’s pressure rating and implement redundant pressure relief per PED 2014/68/EU.
Does the can include pre-drilled ports for temperature sensors or fluid inlets?
Standard units feature one 1/4″ NPT threaded port on the lid and two 3/8″ NPT side ports (one inlet, one outlet), all fitted with PTFE-sealed brass fittings. Custom porting is available upon request with engineering review.
What surface treatment certification is provided with each unit?
Each can ships with a Certificate of Conformance (CoC) listing tin coating mass per ISO 1456, base steel grade per EN 10202, and dimensional verification per ISO 2768-mK. Third-party RoHS and REACH test reports are available on demand.