Thermistor delivers fast and high accuracy measurement

Vishay Intertechnology has launched a new epoxy-coated NTC thermistor with long PEEK-insulated, nickel-iron leads and a low thermal gradient for fast and high accuracy temperature measurement, sensing and control in automotive and industrial applications.

The sensor's conductor wire provides what is claimed to be the lowest thermal conductivity on the market. With its excellent thermal decoupling, the device allows temperature measurement accuracy to ±0.5C. Other conductive wire materials, including copper, can deviate by several degrees.

To enhance reliability in high humidity conditions, the device offers high adhesive strength between its PEEK-insulated lead wires and encapsulating epoxy lacquer. The device provides a small maximum bead size diameter of 1.6mm, producing a fast response time of less than 3s in air. The device's long — 75mm — and flexible radial leads enable for special mounting or assembly needs.

The device's exceptional accuracy and fast speed make it excellent for boilers, fire and smoke detectors, battery management systems for battery packs, charge circuits, DC fan motors, seat heating and HVAC sensors in cars, and printer heads.

The RoHS-compliant sensor provides resistance at +25C (R25) of 10kOhm, with curve tracking between 25C and 85C, and beta (B25/85) of 3984K, with tolerance of ±0.5%. The device features maximum power dissipation of 50mW and functions over an expansive temperature range of -55C to +150C.