Oriental Science Apparatus Workshops (OSAW India) is leading Exporter, Manufacturer and Supplier of Scientific Apparatus, Laboratory Equipment for School, College and Universities, Research Tools, Industrial R&D and Testing Equipment and Agriculture Equipment Since 1919 (Completed almost 98 Years into Manufacture, Exports and Supply of Scientific, R&D, Precision and Analytical Equipment). Under the fine Business acumen and Experienced R&D-Operations of Mr. Neeraj Garg (Director: OSAW India), in past 2 decades OSAW India enjoyed the appreciation and excellence awards by gaining the credible and reputed position in Industry with its exports overpassing the domestic sales turnover. In past several years, apart from supplying Laboratory Equipment, Physics Lab Apparatus and Experiments and Training Modules to various reputed institutions (Like NIT’s and IIT’s) in India, OSAW India had been associated with supply and exports in Gulf, Middle East, South Asia and Europe. Apart from its regular supply of equipment and apparatus in School, College, University and Research Labs, some of the precision equipment like Voltmeter, Galvanometer, Ammeter, Kelvin Bridge, Moisture Meter, Babinet Compensator, Potentiometer, Precision Electronic Balance, Optical Spectrometer, Microscopes are widely used in Industrial Research and Operations, due to its high quality equipment, excellent after sales support and durability. OSAW Kelvin Double Bridge Cable Testing Machine are widely being used by reputed and renowned Cable Manufacturers. Industrial Kelvin Double Bridge is used by wires and cables manufacturers used for finding the resistance of transformer winding. Industrial Cable Manufacturers also use other OSAW Products including Wheatstone Bridge, Travelling Microscopes, Ovens, Drying Ovens and Tensile Testing Machine.
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Wheatstone Bridge | Industrial Kelvin Double Bridge
Travelling Microscopes | Ovens | Drying Ovens | Tensile Testing Machine
- OSAW Industrial Kelvin Double Bridge (29720)
- OSAW Senior Kelvin Double Bridge (29721)
Portable Wheatstone Bridge (32042)
Facility for Cable Fault Location by adopting Murray or Varley Loop Circuit Tests
- Self contained with a Dry Battery and a Galvanometer
- Equipped with Switches for controlling sensitivity
- Facility to connect external battery or external Galvanometer
- Contained in hard wooden box with good polish. A carrying handle provided to make it portable (Portable Wheatstone Bridge). Rubber feet provided.
- Brief instruction provided in the lid of the instrument
- Two toggle switched are given to select the Resistance Varley and Murray modes of operation
- Earth Terminal provided to connect the Earth Point
The range is 0.001 ohm (Ω) to 11.11 Mohm (MΩ). The multiplying factors of 0.001, 0.01, 1.0, 10, 100 and 1000 in the ratio arms for bridge and Varley Circuits are provided. For Murray Loop test, the multiplying factors are 10, 100 and 1000. In series arm four decades in steps of thousands (1000), hundreds (100), tens (10) and units (1) of ohms can be used as a series resistance box also. Manganin Coils having accuracy of ±0.05% or ±1 milliohm have been used.
Wheatstone Bridge (P.O Boxes) Plug Type
Made of specially treated material to withstand wear and tear. Plugs are turned to a fixed taper on precision machines and are interchangeable. Metal blocks are specially shaped under cut and fitted to thick plates of the high insulation materials. The coils are mounted beneath the plate. The coil value are clearly marked on the metal blocks and infinity gap is provided. These have three pairs of ratio coils of 10, 100 and 1000 Ohms and 16 series coils of 1, 2, 2, 5, 10, 20, 20, 50, 100, 200, 200, 500, 1000, 2000, 2000 and 5000 ohms (Total 11110 Ohms)
Two tapping keys with silver contacts are provided for battery and Galvanometer contained in a polished hard wood case.
Accessories of OSAW Kelvin Double Bridge
D.C Sources: Matching units for the OSAW Kelvin Double Bridge, which eliminates the use of high current batteries:
- Easy Handling
- No Maintenance
- Life Long
- Robust and Light
- Continuously Variable
- Mains Operated
Adjustable Heavy Duty D.C Source (29730A): Suitable for OSAW Industrial Kelvin Double Bridge, Current Continuously Adjustable 0 to 10 Amp. upto 1.5 Volts
Adjustable Heavy Duty D.C Source (29730): Suitable for OSAW Senior Kelvin Double Bridge, Current Continuously Adjustable from 0 to 25 Amp upto 3 Volts.
Conductivity Attachments: Wire holding device designed for the determination of resistance of cable and wires. Heavy terminals for current connections are provided. The potential contact points are designed so that the conductor between them is exactly 50.
- Handy attachment
- Sample Holding capacity 42 SWG to 1/2* Dia Rod
- Separate current and potential terminal arrangements