Wien Series Resistance Bridge Manufacturer,Supplier and Exporter in India
Product Code : EL-SI-8069
Jlab Export is a leading Wien Series Resistance Bridge Manufacturer,and suppliers in India
Wien Series Resistance Bridge (code EL-SI-8069) is a Wien bridge for measuring unknown capacitance in college physics and electrical measurement labs. It has a built-in 1 kHz sine-wave source, a null detector with digital display, decade dials for R1 to R4 and five unknown values on the panel, chosen with a rotary switch, so a class can start measuring without extra equipment. It is made by Jain Laboratory Instruments Pvt Ltd (JLab) at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Measures | Unknown capacitance (Wien bridge method) |
| AC source | Built-in sine-wave signal of 1 kHz; two sockets for the AC output |
| Source controls | Amplitude, switch and indicating lamp on the Bakelite board (listed as “The Amplitude of AC switch indicating lamp is provided on the bakelite board”) |
| Detector | Built-in null detector with digital display; listed as optional, as some units have a small speaker instead |
| Connections | 4 mm sockets; circuit layout spread out on the board for convenient working and clear understanding |
| Unknowns | Five unknown values on the panel, selected by a rotary switch |
| R2 | Two decade dials: x10 and x100 |
| R1, R3 and R4 | Decade dial of x100 each |
| Quality check | Each bridge 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-8069 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Wien Series Resistance Bridge Used For?
The Wien bridge, named after Max Wien and often spelt “Wein bridge” in lab catalogues, is an AC bridge in which an unknown capacitor, with its loss represented as a resistance in series, is compared with a known capacitor and resistances in the other arms. At balance both the capacitance and the series resistance of the unknown can be found from the dial settings. It is a standard practical in BSc physics and in electrical measurement courses at engineering colleges and polytechnics, usually alongside other AC bridges for inductance and capacitance.
In use, choose one of the five panel unknowns with the rotary switch, switch on the built-in 1 kHz source, and adjust the R2 dials and the other decade arms until the digital null detector shows a minimum — or, on a speaker-type unit, until the tone fades to its quietest. Note the dial readings, calculate the unknown capacitance from the balance equation, and repeat for the remaining unknowns.
What to Specify When Ordering
- Quantity — the minimum order is 10 bridges, supplied individually.
- Detector type — say whether you need the digital null detector or accept a speaker-type detector, as the listing gives both.
- Power supply — state the supply you will use so JLab can confirm compatibility.
- Other AC bridges — add Schering, Anderson, Owen or frequency bridges to the same enquiry if your syllabus needs them.
Frequently Asked Questions
What does the Wien Series Resistance Bridge measure?
Unknown capacitance. Five unknown values are built into the panel and selected with a rotary switch, so students can start measuring straight away.
Does it need an external oscillator or detector?
No. A 1 kHz sine-wave source and a null detector with digital display are built in. The listing notes the digital detector is optional, and some units use a small speaker instead; state your preference when ordering.
Which arms can be adjusted?
R2 has two decade dials (x10 and x100), and R1, R3 and R4 each have a decade dial of x100.
Is “Wien” or “Wein” correct?
The bridge is named after the physicist Max Wien, so “Wien” is correct; “Wein bridge” is a common misspelling for the same instrument. This product was earlier listed as the Wein Series Resistance Bridge.
How is it different from a Schering bridge?
Both measure capacitance with an AC source and null detector. The Schering bridge is usually chosen when the loss angle or dissipation factor of a capacitor or insulation is the main interest, while the Wien series-resistance bridge is the simpler teaching circuit for capacitance with its series loss.
What should an export quotation request include?
The quantity, destination country and port or city, delivery terms such as FOB or CIF, packing or labelling instructions and the tender reference, if there is one.
Who manufactures it?
Jain Laboratory Instruments Pvt Ltd (JLab), at its works in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an electrical and electronic lab instruments manufacturer in India, incorporated in 2017 with its works on Hargolal Road, Ambala, Haryana. This bridge is produced in JLab’s own works rather than sourced from a trader, so colleges, universities, dealers and importers buy it factory-direct; each one is visually inspected before dispatch, and repeat orders are handled by the manufacturer. JLab exports worldwide and ships to buyers in every region — Egypt in North Africa, South Korea in East Asia, Honduras in Central America and the Caribbean, Benin in West Africa and Switzerland in Western Europe, among others. For tender supply, see the JLab lab tenders page.
Related AC Bridges and Accessories
- Schering Bridge — a capacitance bridge in a teak wood case with a built-in 1 kHz sine-wave source.
- Frequency Wien Bridge — a Wien bridge designed to find the unknown frequency of a bridge oscillator.
- Self Inductance Anderson Bridge — the matching AC bridge for self-inductance, with four unknowns supplied.
- Fixed Condenser Boxes — capacitor boxes with two 4 mm socket terminals, for extra known capacitances.
- Head Phone — flexible headphones with high-resistance receivers, a traditional audio null detector for AC bridges.
The complete Scientific Instrument range and the Indian Instruments section list more bridges.
Request a Quote
JLab quotes for the bridge directly as its manufacturer. Use the Add To Cart enquiry button on this page, or send the quantity (minimum 10 units), your detector preference, the supply you will use and your delivery location through the contact page.
Last updated: 8 October 2026
