Decade Capacitance Box Manufacturer,Supplier and Exporter in India
Product Code : EL-DB-1249
Jlab Export is a leading Decade Capacitance Box Manufacturer,and suppliers in India
Decade Capacitance Box (code EL-DB-1249) is a switched box that sets a known capacitance in microfarads with one to four decade dials, for RC, AC bridge and resonance experiments in college and university physics and electrical labs. The four-dial model runs from 0.001 µF to 11.11 µF. Its very low contact resistance band switches are mounted on a Bakelite panel in a wooden case. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Type | Decade capacitance box; capacitance selected with band switch dials |
| Switches | Band switches with very low contact resistance |
| Panel and case | Bakelite panel mounted in a wooden case |
| Single-dial model | 0.1 µF to 1 µF |
| Two-dial model | 0.01 µF to 1.1 µF |
| Three-dial model | 0.001 µF to 1.11 µF |
| Four-dial model | 0.001 µF to 11.11 µF |
| Unit used in the listing | mfd (microfarad, µF); 0.001 µF = 1 nF |
| Fixed capacitance | Also listed, in a Bakelite box; values not stated — specify the value you need |
| Quality check | Each capacitance 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-DB-1249 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with Other JLab Capacitance and Decade Boxes?
| Model | Quantity set | Listed range or steps | Construction (as listed) |
|---|---|---|---|
| This decade capacitance box (EL-DB-1249) | Capacitance | 0.1–1 µF on one dial up to 0.001–11.11 µF on four dials | Low contact resistance band switches; Bakelite panel; wooden case |
| Capacity Box Dial Type | Capacitance | One to four dials of ten steps each; dial steps of 0.001, 0.01, 0.1 or 1 mfd | High grade paper condensers in a wrinkled metal case |
| Decade Inductance Box | Inductance | 0.1–1 H on one dial up to 0.001–11.1 H on four dials | Same band switches, Bakelite panel and wooden case |
Choose this box when you want the capacitance arm to match the construction of the decade inductance and resistance boxes on the same bench. The Capacity Box Dial Type is the alternative listed with paper condensers in a metal case, and the inductance box supplies the L for resonance work.
What Is the Decade Capacitance Box Used For?
A decade capacitance box replaces a drawer of loose capacitors with a single switched unit, so a student can change C in steps and watch the effect. In undergraduate physics and engineering labs it is used with a resistance box to study charging and discharging and the RC time constant (τ = RC), as a known arm in AC bridges that compare capacitances, such as the De Sauty, Wien and Schering bridges, and with a decade inductance box in series and parallel LCR resonance experiments. It also shows how capacitive reactance XC = 1/(2πfC) falls as frequency or capacitance rises, and supplies known capacitors for comparing capacitances with a ballistic galvanometer.
The dials add together, so the setting is the sum of all dial positions, and the 0.001 µF (1 nF) finest step of the three- and four-dial models allows fine bridge balancing. At such small values the capacitance of connecting leads and any surface leakage start to count, so keep leads short and the Bakelite panel clean and dry. The working voltage is not given in the listing — confirm it with JLab before use in higher-voltage circuits — and after charging the box from a DC supply, discharge it before touching the terminals.
What to Specify When Ordering
- Number of dials — one, two, three or four, depending on the range and finest step you need.
- Fixed capacitance — if you also need a fixed capacitance in a Bakelite box, state the value, as the listing gives none.
- Working voltage and accuracy — ask for them in the quotation when your tender or experiment requires them.
- Quantity and matching boxes — the minimum order is 10 units; decade inductance and resistance boxes can be added to the same enquiry.
Frequently Asked Questions
What is a decade capacitance box used for?
It provides an adjustable, known capacitance for RC time-constant experiments, AC bridge comparison of capacitors, LCR resonance and capacitive-reactance studies in college and university physics and electrical labs.
Which capacitance ranges are available?
Four models are listed: one dial 0.1 to 1 µF, two dials 0.01 to 1.1 µF, three dials 0.001 to 1.11 µF and four dials 0.001 to 11.11 µF.
What does “mfd” mean in the listing?
It is an older abbreviation for microfarad (µF). The finest step of the three- and four-dial models, 0.001 µF, equals 1 nF.
Are the capacitor type, working voltage and accuracy stated?
No, the listing does not give them. Ask JLab to state them in the quotation for the model you choose, particularly if they are part of a tender specification.
How does it differ from the Capacity Box Dial Type?
Both set capacitance with one to four dials. This box uses low contact resistance band switches on a Bakelite panel in a wooden case, while the Capacity Box Dial Type is listed with high grade paper condensers in a wrinkled metal case and ten steps per dial.
What should I send for an export quotation?
The number of dials, quantity, destination country and port or city, preferred delivery terms such as FOB or CIF, packing or labelling instructions, and any tender reference.
Who manufactures the decade capacitance box?
It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, Haryana, India, and is quoted directly by the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a physics lab equipment manufacturer in India, incorporated in 2017, with its works on Hargolal Road, Ambala, Haryana. This capacitance box is assembled at JLab’s own works rather than traded, which lets colleges, universities, dealers and importers order it directly from the maker; every box is visually inspected before dispatch and repeat or matching orders are handled in-house. JLab exports worldwide and ships to buyers in every region — Papua New Guinea in Oceania, the Netherlands in Western Europe, the USA in North America, Bahrain in the Middle East and Hong Kong in East Asia, for example. Tender buyers can refer to the JLab lab tenders page.
Related Decade Boxes and AC Apparatus
- Decade Inductance Box — the matching L arm with the same band switch construction.
- Decade Resistance Box — the matching R arm for RC and LCR circuits.
- Capacity Box Dial Type — an alternative dial capacitance box with paper condensers in a metal case.
- Maxwell Inductance Capacitance Bridge — an AC bridge that measures inductance in terms of a standard capacitance.
- LCR Resonance Apparatus Series and Parallel — a complete bench set for plotting current against frequency in LCR circuits.
- Resistance Boxes — dial-type resistance boxes for RC time-constant work.
Browse the Decade Box range or the full Scientific Instrument range.
Request a Quote
Quotes come direct from the manufacturer. Use the Add To Cart enquiry button on this page, or send the number of dials, quantity (minimum 10 units), any fixed capacitance value and your delivery location through the contact page.
Last updated: 8 October 2026
