Galvanometer
Product Code : SCL-PLE-11741
The StemAids Galvanometer is a precision moving-coil instrument engineered for the detection and indication of extremely small electric currents. Optimized for Secondary and University-level physics, this center-zero meter is the foundational component for null-point detection in Wheatstone bridge and potentiometer experiments. Manufactured to ISO 9001:2015 standards, it provides a high-stability, low-damping solution for quantifying electrical equilibrium within institutional laboratory environments.
Technical Specifications
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Tender Specification |
OEM Technical Detail |
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Movement Type |
High-sensitivity Moving Coil (PMMC) with jewel bearings |
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Scale Configuration |
Center-Zero (30−0−30 or 50−0−50 divisions) |
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Sensitivity / Figure of Merit |
Typically 20μA/div or 50μA/div |
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Internal Resistance |
G≈50Ω to 100Ω (Batch-specific calibration) |
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Zero Adjustment |
External mechanical screw for precise pointer alignment |
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Chassis Construction |
High-impact ABS polymer case with a clear, anti-glare acrylic window |
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Terminals |
Color-coded, safety-shrouded 4mm brass binding posts |
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ISO Compliance Code |
Manufactured under ISO 9001:2015 Quality Management Systems |
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HS Code |
9030.33.00 (Instruments for measuring/detecting voltage/current) |
Key Pedagogical Outcomes (Bloom’s Taxonomy Alignment)
- Current Detection Interface: Facilitates student visualization of the direction and magnitude of small currents (I), supporting Electromagnetism Module 101.
- Figure of Merit Quantification: Enables the physical study of sensitivity, allowing learners to apply the formula k=I/θ to determine the current required for a one-division deflection.
- Bridge Balancing Analysis: Supports the analysis of balanced networks; the galvanometer’s center-zero design is critical for achieving a "null-point" where Ig=0.
- Instrument Conversion Evaluation: Allows students to evaluate the versatility of the device as it serves as the base movement for conversion into a Voltmeter (via high-resistance series multiplier) or an Ammeter (via low-resistance parallel shunt).
International Logistics & Compliance
StemAids ensures comprehensive OEM readiness for global institutional procurement:
- Packaging: Export-grade seaworthy crating (ISPM-15 compliant) featuring high-density foam molding to lock the pointer and protect the delicate hairspring and jewel bearings from vibrational stress during transit.
- Documentation: Includes Manufacturer’s Authorization Form (MAF), Certificate of Conformance (CoC), and individual calibration data.
- Durability: Tropicalized design featuring anti-fungal treatment on the scale plate and oxidation-resistant coil windings, tested for performance in high-humidity climates (up to 90% RH).
Direct OEM Sourcing Advantages
Procuring the StemAids Galvanometer directly ensures vertical manufacturing control:
- In-House Magnetic Flux Calibration: Every permanent magnet is batch-stabilized to ensure a uniform radial magnetic field, resulting in a perfectly linear scale.
- Batch-Tested for Uniform Reliability: Every unit undergoes a "zero-return" test to ensure the pointer returns to center without hysteresis after full-scale deflection.
- Direct Factory Spares Availability: Guaranteed availability of replacement glass windows, terminal nuts, and calibrated pointer assemblies to maximize long-term laboratory ROI.
- Manufacturing Control: Direct oversight of the coil-winding process ensures minimal internal resistance variation, providing consistent results across entire classroom sets.
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