Double Portable Bridge
Product Code : JA-SI-8052
The Double Portable Bridge (SKU JA-SI-8052) measures very low resistances, from 0.00001 ohm to 110 ohm, using the double bridge principle with a four-terminal connection (C1, P1, C2, P2) to the unknown. A ratio dial sets the multiplying range, a main resistance dial covers 1 ohm in ten steps of 0.1 ohm, and a circular scale in series adds 0.1 ohm in 100 steps of 0.001 ohm for fine balance. A galvanometer is built in, and a double point press key brings the galvanometer and battery into circuit.
Specifications
Dials, range and connections as listed:
| Product | Double Portable Bridge |
| SKU | JA-SI-8052 |
| Range | 0.00001 ohm to 110 ohm |
| Ratio dial | Multiplying range 100, 10, 1 and 0.01 |
| Main dial | 1 ohm, ten steps of 0.1 ohm |
| Circular scale | 0.1 ohm, 100 steps of 0.001 ohm, in series with the main dial |
| Galvanometer | Inbuilt, with g1 and g2 terminals and a selector for an external galvanometer |
| Key | Double point press key for galvanometer and battery |
| Unknown connection | Four terminals: C1, P1, C2, P2 |
Where the double portable bridge is used
- Low-resistance measurement practicals in electrical and physics laboratories
- Resistance of short conductors, contacts and windings where lead resistance matters
- Four-terminal measurements on specimens held in a conductivity attachment
Scope of supply and ordering
The bridge is supplied with its inbuilt galvanometer and press key; battery, leads, quantities and packing are confirmed on the quotation.
Frequently asked questions
What range does the double portable bridge cover?
From 0.00001 ohm to 110 ohm.
Can an external galvanometer be used?
Yes, terminals g1 and g2 with a selector allow an external galvanometer instead of the inbuilt one.
How is the unknown connected?
Through four terminals, C1, P1, C2 and P2, so lead resistance does not affect the reading.
Related products
- Industrial Double Bridge
- Conductivity attachment
- Portable Wheatstone Bridge
- Portable Wheatstone Bridge with Loop Test
Other bridges are listed in our scientific instrument range.
Request a quote
To order the Double Portable Bridge, give the quantity on the contact page. For tender or project supply, see our tenders page.
