Burrell Model 075-795-04-36 Variable-Speed Wrist Action Shaker

Overview

The Burrell Model 075-795-04-36 is a precision-engineered variable-speed wrist action shaker designed for consistent, low-shear mixing in life science and clinical laboratories. Unlike orbital or reciprocating shakers, this instrument replicates the natural biomechanical motion of a human wrist—producing a gentle, elliptical oscillation that minimizes foaming, cell disruption, and sample denaturation. Its core mechanism employs a cam-driven oscillating arm system, delivering reproducible angular displacement (0–15°) and frequency control (0–450 oscillations per minute), making it ideal for applications requiring controlled agitation without vigorous turbulence. The dual-platform configuration supports parallel processing of heterogeneous sample sets while maintaining independent mechanical integrity—critical for labs performing comparative assays, reagent preparation, or multi-step immunoassays.

Key Features

• Variable-speed control via calibrated analog dial, enabling precise selection from 0 to 450 oscillations/min with ±10% accuracy under maximum load (10 lb / 4.5 kg per platform)
• Adjustable oscillation angle (0–15°) to optimize mixing efficiency across viscous, particulate, or surface-sensitive samples
• Dual independent platforms—each accommodating standard SUREGRIP™ clamps and compatible with universal labware including culture tubes (125 mL × 10), Erlenmeyer flasks (250–300 mL × 8), and wide-mouth bottles (500 mL × 6)
• Robust construction featuring anodized aluminum frame and stainless steel platform surfaces for corrosion resistance and long-term dimensional stability
• Programmable timer with 1–60 minute range plus continuous operation mode; auto-shutoff ensures protocol fidelity and energy efficiency
• CE-certified electrical architecture compliant with IEC 61010-1 safety standards for laboratory equipment
• Compact footprint (17.5″ × 17.5″ × 12″) optimized for benchtop integration in biosafety cabinets, cold rooms, or shared instrumentation spaces

Sample Compatibility & Compliance

The Model 075-795-04-36 accommodates a broad spectrum of biological and chemical sample formats without modification—including glass and polypropylene vials, centrifuge tubes, filtration funnels, and disposable culture containers. Its low-inertia oscillation profile meets ASTM D2240 requirements for gentle suspension homogenization and aligns with USP guidance for aseptic compounding workflows where minimal shear stress is essential. While operating at ambient temperature only, its mechanical consistency supports GLP-compliant documentation when paired with external environmental monitoring systems. Device firmware and operational logs do not include electronic audit trails; however, manual timer use and physical platform labeling support traceability in ISO 17025-accredited testing environments.

Software & Data Management

This shaker operates as a standalone electromechanical instrument with no embedded microprocessor, network interface, or proprietary software. All parameter adjustments—including speed, angle, and timing—are performed manually using front-panel controls. This design eliminates firmware dependencies, cybersecurity vulnerabilities, and validation overhead associated with computer-interfaced devices. For regulated environments requiring documented operation, users may integrate the shaker into validated SOPs using external time-stamped video recording, calibrated tachometer verification, or paper-based logbooks referencing batch-specific settings (e.g., “Model 075-795-04-36, 220 osc/min, 8°, 25 min, Platform A only”). No FDA 21 CFR Part 11 compliance features are present, consistent with its classification as Class I laboratory hardware.

Applications

• Antibody-antigen incubation in ELISA and lateral flow assay development
• Suspension of microbial cultures prior to plating or OD measurement
• Homogenization of tissue lysates and protein extraction buffers
• Equilibration of chromatography columns and affinity resins
• Rehydration and dispersion of lyophilized reagents and standards
• Low-shear mixing of blood bank specimens and coagulation panels
• Pre-analytical sample conditioning for flow cytometry and hematology analyzers

FAQ

Is the oscillation frequency calibrated and traceable to NIST standards?
No factory calibration certificate is supplied. Users may verify performance using a handheld optical tachometer or stroboscopic method against the analog dial indication. Routine verification is recommended before critical experiments.
Can the shaker be operated inside a CO₂ incubator or cold room?
It is rated for ambient operation only (typically 15–30°C, non-condensing environment). Extended use below 15°C or in high-humidity enclosures may affect motor longevity and electrical insulation integrity.
What accessories are included with Model 075-795-04-36?
The unit ships with two universal SUREGRIP™ clamp assemblies (one per platform), mounting hardware, and a user manual. Flask racks, tube holders, and custom adapters are available separately under Burrell part numbers OO022000 through FF2422012.
Does the dual-platform design allow independent speed control?
No—both platforms share identical motion parameters driven by a single oscillation arm assembly. Speed and angle settings apply uniformly across both surfaces.
Is maintenance required beyond routine cleaning?
Yes. Annual inspection of the cam follower bushing and drive belt tension is advised. Lubrication is not user-serviceable; contact authorized Burrell service centers for preventive maintenance after 5,000 operating hours.