Spectrum Sensors & Controls Inc., a subsidiary of Spectrum Control, Inc., designs and manufactures precision position sensors, temperature sensors and inertial measurement systems. The Precision Position Sensors Operation, formerly JDK Controls, is located in Grass Valley, CA and was founded in 1983, while the Advanced Thermal Products Operation, formally Advanced Thermal Products, was founded in 1985 and is located in St. Marys, PA. The precision inertial measurement products operation is located just outside of Cleveland, OH at the former Summit Instruments. Spectrum Sensors has low cost, world class manufacturing centers in both China and Mexico to provide their customers with application specific solutions worldwide.

Precision Position Sensors and Transducers
Spectrum Sensors’ precision potentiometer & position sensor product line features hollow shaft, rotary, linear, motorized, and fader/angular arm designs, as well as element segments and wiper assemblies. Spectrum’s Precision Position Sensors offer high reliability and the longest life (l00 million cycles min.) with precise sensing (0.1% linearity). All Precision Position Sensor products are designed for demanding environments such as High G shock, vibration, extreme moisture and temperature ranges and Spectrum will customize any of these products for specific applications. Spectrum’s precision position sensors provide high performance at low costSpectrum Sensors and Controls.


  • Ultra-Long Dither/Rotational Life - 100 million revolutions minimum
  • Superior Output Smoothness - always under 0.05% (standard angles)
  • Highest Shock & Vibration Rating in the Industry
  • No Internal Solder Connections - conductive epoxy and welded connections used for greater reliability
  • Low Torque - less than 0.1 oz. in.
  • All units Designed, Manufactured, and Tested in accordance with MIL-R-39023

The Precision Position Sensors operation is a leader in serving applications where reliability and precision in the potentiometer and position sensor is critical to the user’s system. Spectrum Sensors & Controls manufactures precision co-molded conductive plastic potentiometers and position sensors and transducers. All of their products are designed, manufactured and tested in accordance with MIL-R-39023 and Quality Assurance with MIL-I-45208A. Spectrum also produces ultra precise, non-contact Hall Effect position sensors, which feature absolute linearity of ±0.1% and are qualified to RTCA/DO-160F aircraft standards. Standard sizes include 1/2" (12.7 mm), 7/8" (22.23 mm) and 7/8" (22.23 mm) dual (double redundant), with high temperature and custom versions available.

Spectrum Sensors and Controls

Precision Position Sensors Value Added Capabilities

  • Various Gage Wire
  • Various lengths
  • Custom thermo plastic housing
  • Custom gear / shaft assemblies
  • Custom shaft mounting configurations
  • With / without connectors
  • Custom mount plates
  • Custom wire and cable assemblies

Temperature Sensing Products
Spectrum Sensors and ControlsSpectrum Advanced Thermal Products manufacturers a complete line of temperature-sensing probes and assemblies, PTC and NTC thermistors, resistance temperature detectors (RTDs) for surface, immersion and air temperature applications. Designs include PTC thermistors for heating, over-current protection and temperature sensing; NTC thermistors for temperature measurement and control; and platinum and nickel RTDs. Packaging specialists, Spectrum designs a wide range of moisture and shock resistant models that have excellent free/thaw tolerances. Spectrum Advanced Thermal Products offers the fastest prototypes and the shortest lead times in the industry.


Temperature Probes and Assemblies

PTC Thermistors
  • Heavy duty and lightweight designs
  • 10,000 freeze/thaw cycles
  • Quick response and excellent thermal tracking
  • Wide operating temperature range -80°C to +500°C
  • No thermostat needed
  • No electrical noise
  • Efficient operation
  • Virtually unlimited life
  • Rapid response to changes in temperature
  • Fast switching

Spectrum Sensors and Controls NTC Thermistors RTDs and Assemblies
  • -50°C to 300°C operation
  • Resistance values from 100Ω to 1.38MΩ at 25°C
  • High temperature stability
  • Rugged design and construction
  • Very fast response times
  • High sensitivity to changes in temperature
  • Wide variety of resistance vs. class accuracies
  • Excellent long term stability
  • Values from 100Ω to 1,000Ω at 0°C
  • Resistant to vibration & thermal shock
  • Platinum & nickel elements
  • Small size, fast response time
  • Available in standard DIN

Inertial Measurement Systems
Spectrum Sensors & Controls now designs and manufactures precision inertial measurement products, formerly from Summit Instruments. This product line, which includes standard and custom accelerometers, rate gyros and inertia measurement systems, provides a wide range of accurate, rugged and easy-to-use systems for data collection in the industrial, military, aerospace and test measurement industries.

Spectrum’s digital and analog accelerometers provide complete design flexibility with a choice of uniaxial, biaxial or triaxial configurations, as well as customizable g range, bandwidth and data output. Digital accelerometers utilize analog-to-digital (A/D) converters, ensuring the output is a true digital signal ready for direct input to your computer. With sampling speeds up to 42,500 samples/sec/channel, these digital accelerometers meet the speed requirements of most applications. Spectrum’s ruggedized analog accelerometers use silicon capacitive mass MEMS technology to measure accelerations to ±100g along with internal temperature in a package of approximately one cubic inch. Additionally, analog accelerometers use a 50-point calibration for NIST traceable results.

Rate gyros, available in triaxial and uniaxial configurations, measure rotation rate ranges from ±50°/sec up to ±600°/sec or ±1200°/sec, depending on application needs. With high accuracy and linearity over a wide temperature range of -40°C to +85°C, these rugged-construction gyros are built to customer specifications, meeting exact configurations required for your measurements.

With complete six degrees of freedom and telemetry kits, Spectrum Sensors’ inertial measurement systems for stores separation and compatibility testing are completely self-contained and require no power from the aircraft undergoing testing. These easy-to-use systems can be installed and configured in under 20 minutes, and can include wireless telemetry transmitters, which are IRIG-106 compliant. Configurable sensor parameters and telemetry settings offer quick and easy changes on the flight line. All systems include Li-Ion battery packs and optional frequency selectable telemetry transmitters. Their ICU (Instrument Configuration Utility) software is used to configure all sensors and communications and will automatically generate TMATS files.

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