Electromagnetic Instruments for Physics Teaching and Laboratory Experiments
Our electromagnetic instruments are designed for university physics laboratories and educational institutions. The product range includes four instruments for electromagnetic launch experiments, solenoid magnetic field measurement, electromagnetic field visualization, and Hall effect experiments.
These instruments support different experimental tasks in electricity and magnetism teaching, from capacitor energy storage and magnetic field measurement to electromagnetic wave propagation and Hall effect analysis.
Technical Specifications
LB-EMA Capacitor Energy Storage Electromagnetic Launcher Experiment Apparatus
| Charging voltage | 0–150 V, continuously adjustable |
|---|---|
| Voltage display accuracy | ±0.1 V |
| Energy storage capacitors | 330 μF / 200 V × 3 |
| Solid-state switch | 12 A / 220 V |
| Launching coil turns | 200, 250, 300 turns |
| Launching angle adjustment | 0–40° |
| Barrel inner diameter | 10 mm |
| Projectile velocity measurement range | 0–3 m/s |
LB-SM Solenoid Magnetic Field Measuring Instrument
| Hall sensor | SS495A |
|---|---|
| Operating voltage | 5–10 V |
| Operating current | 7 mA |
| Sensitivity | 3.125 mV/G |
| Sensitivity temperature coefficient | 0.02%/°C |
| Excitation constant-current source | 0–0.8 A |
| Current adjustment step | <1 mA |
| Current stability | Better than 10⁻⁵ |
| Magnetic field measurement resolution | 0.1 mT |
| Measurement ranges | 20 mT, 200 mT |
| Solenoid turns | 3250 turns |
| Solenoid inner diameter | 25 mm |
| Solenoid length | 260 mm |
| Measuring rod | 300 mm |
| Scale | 1 mm, readable to 0.1 mm |
| Overall dimensions | 440 × 225 × 145 mm |
LB-VEM Visual Electromagnetic Field Experiment Instrument
| Operating frequency | 2–3 GHz |
|---|---|
| Maximum output power | Less than 27 dBm |
| Transmitting antennas | 3 Yagi antennas + 1 helical antenna |
| Transmitting antenna gain | >10 dBi |
| LED detector sensitivity | 4 dBm |
| Maximum transmission distance | 170 cm |
| Receiving antenna gain | >10 dBi |
| Dynamic range | 70 dB |
| Detection frequency coverage | Above 3.2 GHz |
LB-HL Comprehensive Hall Effect Experiment Apparatus
| Hall voltage measurement range | 0–20 mV |
|---|---|
| Hall voltage resolution | 10 μV |
| Excitation current source | 0–0.8 A |
| Excitation current adjustment step | <1 mA |
| Excitation current stability | Better than 10⁻⁵ |
| Hall current source | 0–2 mA |
| Hall current adjustment step | <10 μA |
| Hall current stability | 10⁻⁵ |
| Helmholtz coil inner diameter | 87 mm |
| Helmholtz coil turns | 252 turns per coil |
| Solenoid turns | 3250 turns |
| Measuring scale length | 300 mm |
| Scale | 1 mm graduation, readable to 0.1 mm |
| Overall dimensions | 442 × 295 × 230 mm |
Experimental Capabilities and Instrument Configurations
LB-EMA Capacitor Energy Storage Electromagnetic Launcher Experiment Apparatus
The LB-EMA demonstrates capacitor energy storage and electromagnetic launching. Its three capacitors can be used individually or connected in parallel. The apparatus is equipped with a projectile recovery system and a safety protection system.
LB-SM Solenoid Magnetic Field Measuring Instrument
The LB-SM is used to measure the magnetic field generated by a solenoid and study related Hall effect principles. An SS495A integrated Hall sensor measures the magnetic field distribution along the solenoid axis.
LB-VEM Visual Electromagnetic Field Experiment Instrument
The LB-VEM supports experiments on electromagnetic wave propagation and electromagnetic field visualization. The listed experiments cover electromagnetic wave propagation, polarization, reflection, standing waves, antenna radiation patterns, multipath interference, and microwave wireless energy transmission. A phased-array antenna experiment is available as an optional experiment.
LB-HL Comprehensive Hall Effect Experiment Apparatus
The LB-HL integrates a solenoid and Helmholtz coils for Hall effect and magnetic field experiments. Its experimental functions cover Hall device characteristics, carrier parameter measurement, solenoid magnetic field distribution, Helmholtz coil magnetic field distribution, magnetic field superposition, and related magnetic field measurements.
The axial position of the coil can be adjusted by ±100 mm. The coil spacing can be configured at R/2, R, or 2R.
Our Manufacturing and Quality Management
We are Nanjing Longbow Scientific&Educational Instrument Co., Ltd. and have been engaged in physics teaching instruments since 1999.
Our product range covers mechanics, thermodynamics, acoustics, optics, electricity, and new energy teaching instruments. Electromagnetic instruments form part of our broader physics laboratory equipment range.
Our manufacturing equipment includes oscilloscopes, frequency counters, and machine tools, as well as equipment for program simulation and programming. We also have a professional R&D team supporting the development and production of physics experimental instruments.
We hold ISO 9001:2015 quality management system certification covering the production and service of university physics experimental instruments and equipment. The certificate is valid through November 8, 2026.
For customer orders, we provide one-to-one pre-sales consultation, production progress follow-up, and after-sales service.
Request a Quotation
- We supply four electromagnetic instrument models for university physics laboratories and educational equipment procurement.
- Send us the product model and required quantity, together with any specific configuration or accessory requirements. We will provide the corresponding product information and quotation for your order.
As one of the most professional electromagnetic instruments manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy customized electromagnetic instruments from our factory. If you have any enquiry about pricelist, please feel free to email us.
Electricity And Magnetism Laboratory Apparatus, electromagnetic instruments, Hall Effect Experiment Apparatus