Fixed Inductance Boxes Manufacturer,Supplier and Exporter in India
Product Code : EL-SI-8090
Jlab Export is a leading Fixed Inductance Boxes Manufacturer,and suppliers in India
Fixed Inductance Boxes (code EL-SI-8090) are known-value inductors for AC bridge and circuit experiments in college physics and electrical labs. They use air-cored inductance coils fitted in a Bakelite case, with an accuracy of ±2.5% and a frequency response listed as 1000 cycles/sec (1 kHz). They are made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Coils | Air-cored inductance coils |
| Accuracy | ±2.5% |
| Frequency response | 1000 cycles/sec (1 kHz), as listed |
| Case | Bakelite (listed as “steel turf bakelite case”) |
| Quality check | Each box is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-SI-8090 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Are Fixed Inductance Boxes Used For?
A fixed inductance box gives students a coil of known value to measure, or to use as a reference, on Maxwell, Anderson, Owen and Hay bridges and in LR time-constant, impedance and resonance experiments alongside capacitor boxes. Air-cored coils have no iron core, so their inductance does not change with the current through them and they have no core losses, which makes them good references for AC work. The listed 1 kHz matches the sine-wave source of JLab’s bridge oscillator and of its AC bridges. Keep the boxes away from iron objects and magnets while measuring, as nearby metal alters the field of an air-cored coil, and store them dry.
Frequently Asked Questions
What accuracy do these inductance boxes have?
±2.5%, as listed, with the frequency response given as 1000 cycles/sec (1 kHz).
What inductance values are available?
The listing does not give the values. Tell JLab the inductances your practicals need and ask which values are supplied as fixed boxes; for a variable inductance, see the dial-type box below.
Why use air-cored coils?
Without an iron core the inductance stays the same at any current and there are no core losses, so the coil behaves as a steady known inductor in bridge measurements.
Who manufactures these boxes?
JLab (Jain Laboratory Instruments Pvt Ltd) makes them at its works in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an electrical and physics lab instruments manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The inductance boxes are made at JLab’s own works, not bought from a trader, so colleges, dealers and importers order factory-direct and repeat orders come from the same manufacturer. JLab exports worldwide and ships to buyers in every region — for example Senegal in West Africa, Hong Kong in East Asia, Chile in South America, New Zealand in Oceania and Kazakhstan in Central Asia. See the JLab lab tenders page for tender supply.
Related Inductance Equipment
- Three Dial Inductance Box — a dial-type inductance box, also listed in two-, four- and five-dial versions.
- Maxwell Inductance Bridge — measures an unknown inductance against a built-in standard inductance.
- Self Inductance Anderson Bridge — a self-contained bridge for measuring self-inductance.
- Fixed Condenser Boxes — fixed capacitor boxes for LC and RC circuits.
- Bridge Oscillator — a fixed-frequency sine-wave source for bridge work.
More in the Scientific Instrument range and the Indian Instruments section.
Request a Quote
JLab quotes as the manufacturer. Use the Add To Cart enquiry button on this page, or send the inductance values and quantity (minimum 10 units) with your delivery location through the contact page.
Last updated: 8 October 2026
