High quality, trembler type spark coil. comprising primary of few turns of heavy wire wound on iron core, mounted horizontally, which is fed by DC current pulses. Secondary coil of very large number of turns of very thin gauge wire completely encompasses the primary and is impregnated with wax. The electromagnetic induction due to current passing through the primary makes the armature oscillate resulting in frequent switching ON/OFF of the current through primary. This produces extremely high rate of change of magnetic field in this Rhumkorff’s coil, giving rise to a potential of several thousand volts in secondary, which is observable in the form of repetitive spark up to 25mm long across adjustable needle. Provided with a safety spark gap beneath needle socket terminals to protect internal damage to the coil against very high voltages. Output from the terminal can also be used to operate high voltage devices such as spectrum tubes etc. operates on 6-9V DC.
Worldwide Institutional Supply & Export Solutions
Advanced Educational, Medical & Technical Laboratory Equipment Manufacturer
INTERLABS is a trusted Indian manufacturer and exporter of educational laboratory equipment, engineering training systems, healthcare teaching products, TVET solutions, medical instruments, communication trainers, clean air systems, and institutional procurement equipment for global educational and healthcare markets.
Educational & Technical Training Systems
Comprehensive STEM learning systems, engineering trainers, electronics communication trainers, embedded control modules, and vocational training equipment designed for schools, universities, polytechnic institutes, and technical education projects.
Healthcare & Medical Equipment Solutions
Professional medical laboratory products, anaesthesia instruments, healthcare teaching systems, institutional medical training products, and procurement support solutions for hospitals, healthcare institutions, NGOs, and government healthcare programs.
Industrial & Clean Air Laboratory Solutions
Clean air equipment, laboratory airflow systems, institutional research products, engineering laboratory systems, and technical infrastructure solutions for industrial, educational, and healthcare laboratory environments.
Global Institutional Procurement & Export Support
We support educational institutions, technical universities, engineering colleges, healthcare projects, vocational training centers, NGOs, ministries, government procurement agencies, and industrial training organizations across Africa, the Middle East, Southeast Asia, and international export markets.
Our export-ready manufacturing infrastructure supports bulk institutional procurement requirements with professional export packaging, OEM manufacturing capability, logistics coordination, and worldwide shipping support for educational and healthcare infrastructure projects.

