Rheostats

  • Linear & Tapered Windings
  • Ganged Units
  • Special Tolerances
  • Non-Preferred Resistance Values Available

Resistance stability is maintained throughout operating temperature range by the exclusive use of resitance wires having a termperatue co-effecient of 20ppm or better, for the resistance values falling within the standard range per type. Wires with particular temperature co-eefecient characteristics can be used to supply customer special design requirements. Resistance values over or under those shown may be available upon request.

TYPE RA 20WATT

10Ω to 50KΩ. 10% tolerance
  • Operating Temperature: Less than 100°C at an ambient of 25°C and with load dissipated over full winding
  • Spindle: 6.5mm diameter. Aluminium. Standard length 19mm - 290°C rotation
  • Mounting: 8mm diameter. Bush. 26 turns per inch. Locating lug. Knob and nuts supplied. Weight 80g
  • Design: Low T/C wire wound on nomex former and fixed into Bakelite housing. Nylon tipped wiper arm pressing in phosphor-bronze contact ring virtually eliminates wear on fine resitance wires. Spindle to element resistance 100MΩ at 100V minimum

TYPE RB 80WATT

7.5Ω to 10KΩ. 10% tolerance
  • Operating Temperature: Less than 100°C at an ambient of 25°C and with load dissipated over full winding
  • Spindle: 6.5mm diameter. Aluminium. Standard length 19mm - 315° rotation
  • Mounting: Two 21.5mm holes through ceramic body. Panel hole for bush 6.5mm diameter. Knob and bolts supplied. Weight 350g
  • Design: Low T/C wire precision wound no heat resistant normex and embedded into ceramic housing for maximum heat dispersion. Spindle to element resistance 100MΩ at 100V minimum

TYPE RC 200WATT

5Ω to 20KΩ. 10% tolerance
  • Operating Temperature: Less than 110°C at an ambient of 25°C and with load dissipated over full winding. Ganged pairs rating is approximately 75% that of single units
  • Spindle: 6.5mm diameter. Steel. Standard length 32mm - 300°C rotation
  • Mounting: Via two 5mm diameter holes in ceramic body. Knob and screws supplied. Weight 800g
  • Ganging: By means of three holes in outer rim. Achieving a greater range of W/U characteristics or simultaneous multiple control
  • Design: Low T/C wire wound on nomex embedded into cast aluminium housing. Spindle to element resistance 100MΩ at 100V minimum

TYPE RD 400WATT

10Ω to 20KΩ. 10% tolerance
  • Operating Temperature: Less than 110°C at an ambient of 25°C and with load dissipated over full winding. Ganged pairs rating is approximately 75% that of single units
  • Spindle: 6.5mm diameter Steel. Standard length 32mm - 300°C rotation
  • Mounting: Via two 5mm diameter holes in central body. Knob and screws supplied. Weight 1kg
  • Design: Low T/C wire wound on nomex embedded into die cast aluminium housing. Maximum dispersion of heat away from resistance element. Nickle silver tipped wiper arm. Spindle to element resistance 100MΩ at 100V minimum

TYPE RE 70WATT

0.2Ω to 1.5Ω. 10% tolerance
  • Operating Temperature: Less than 200°C with continuous use at an ambient of 25°C and with load dissipated over full winding
  • Spindle: 6.5mm diameter. Steel. Standard length 5/8" - 300°C rotation
  • Mounting: Via two spacers tapped 3.5mm in diameter. Knob and screws supplied. Weight 250g
  • Design: The resistance element consists of open coil laced around a ceramic housing. Featuring an end stop shorting bar idael for low resistance high wattage use