Indosaw Contrex Rheostats
The Table-Top Variable Resistor is a versatile tool for controlling DC and AC currents or voltages in electrical applications. Ideal for labs, education, and more, it functions as both a rheostat and potentiometer, offering precise, reliable performance. Built to international standards, it is essential for professionals and educators.
- Elegantly designed and housed in perforated enclosure to ensure safety In accordance with 2002/95/EC (RoHS).
- Construction according to : EN 61010-1
IGCSE Level:
Exp-1 Exploring step-up and step-down transformers and their applications
Exp-2 Understanding how solar cells work and factors affecting their efficiency.
Exp-3 Basics of converting AC to DC and understanding diode functions.
Exp-4 Voltage transformation with a transformer under load.
Exp-5 Demonstrates the use of fuses as circuit protection.
A -Level:
Exp-1 Determination of the earth’s magnetic field.
Exp-2 Electrical conductivity of metals.
Exp-3 Recording the voltage and current of a transformer under load.
Exp-4 Characteristic power curve for a solar cell.
Exp-5 Determining the internal resistance of a battery.
Exp-6 Determining the active and reactive power in AC circuits.
| Resistance tolerance | ± 10 % |
| Insulation resistance | > 3 × 107 Ω |
| Earthing resistance | < 0.1 Ω |
| Allowed voltage at terminals | max. 600 V |
| Allowed voltage between terminals (applied to PRN 3/322) | max. 700 V |
| Breakdown voltage against casing | > 2500 V~ |
| Protection degree | IP 20 |
| Price | Code | Description | Qty. |
| £191.00 | SR2003 | Rheostat 10E, Permanent 4A, 160W | 1 |
| £191.00 | SR2007 | Rheostat 33E, Permanent 2,2A, 160W | 1 |
| £421.00 | SR2101 | Rheostat 1Ω, Permanent 18A, 320W | 1 |
| £303.00 | SR2102 | Rheostat 3,3Ω, Permanent 10A, 320W | 1 |
| £303.00 | SR2105 | Rheostat 10Ω, Permanent 5,7A, 320W | 1 |
| £264.00 | SR2112 | Rheostat 33Ω, Permanent 3,1A, 320W | 1 |
| £255.00 | SR2120 | Rheostat 100Ω, Permanent 1,8A, 320W | 1 |
| £233.00 | SR2127 | Rheostat 330Ω, Permanent 1,0A, 320W | 1 |
| £243.00 | SR2136 | Rheostat 1kΩ, Permanent 0,57A, 320W | 1 |
| £227.00 | SR2142 | Rheostat 3,3kΩ, Permanent 0,31A, 320W | 1 |
Other range of Rheostats series (PRN 162, PRN 322, PRN642, PRN 962 & PRN 3×322) with one, Two & Three parallel connected resistance coil available. Three phase version with resistance coil 3 x 320VA also available.