Screw-on Type NTC Temperature Sensor
(NTSA Series)

Epoxy Type NTC
Temperature Sensor
(NTSE Series)

SMD Type NTC Thermistor
(TSM Series)

Dip Type NTC Thermistor
(TTC03 Series)

1. NTSA series is the NTC temperature sensor with ring terminal for simple screw-on installation. Voltage sensing line for circuit design is also available for this product. For customer’s needs, various terminals sizes (M2.5 to M10) and types are available, and wire length of the product can be adjusted to mechanism. It is ideal for measuring the temperature of transformers, heat sink of power devices for converters, and motor drives.

2. Simple structure is the feature of NTSE series, epoxy coating type NTC temperature sensor. The component is with high commonality and its cable length and structure can be customized for customer’s mechanism. It is often adopted to measure the temperature of motors, power tool batteries, and control boards.

3. TSM series is SMD NTC thermistor from THINKING, and EIA 0201, 0402, 0603, and 0805 sizes are available for this series. Its small size enables its fast response, and its SMD structure is suitable for automated production. The SMD type NTC thermistor is ideal for battery module and control board temperature protection.

4. The standard dip type NTC thermistor, TTC03, is with bendable leads, which can be straight or kinked. With the kink leads, the sensing top is lifted up and stays as close to the detected objects for accurate temperature detection. The featured story below demonstrates how the dip type NTC thermistor can be customized to specified requirements.

If you are looking for existing sensor assemblies, check out THINKING temperature sensors for HVAC, boilers and heating systems and more.

Designing a temperature sensor requires both electrical and mechanical experts to integrate the sensor's physical configuration into the customer's product design. The following story presents how THINKING design teams developed a sensor integrated into a pump motor control.

THINKING was asked to develop an NTC sensor with a lift-up holder. The requirement was to keep the sensing top at a specific distance from the PCB and stay as close as possible to the detected object. In addition, the sensor unit should withstand the associated stress of the automatic assembly process. This sensor comprises a TTC03 series NTC thermistor because its leads can be fixed standing up. As a solution to the challenge of protecting the thermistor during automatic assembly, THINKING and the customer discussed the idea of a holder.

The other design challenge for THINKING was to match the plastic parts assembly because the sensor was relatively small, and the tolerance of the plastic part dimensions was tight. Our engineers carefully verified and controlled the factors that would impact the fitness of the parts and the NTC element, including part design, tooling design, and production manufacturing. Tooling design is a complex and highly technical process. Our experts own years of experience and hands-on knowledge to ensure the tooling quality for producing parts with tight tolerances and to optimize manufacturing processes.

After a few rounds of modeling, prototyping, and testing, THINKING came up with a reliable NTC sensor in a snap-fit holder design that was strongly bonded by ultrasonic welding. Meanwhile, another challenge THINING had to overcome was to deliver the sensor unit in taping and reel. When the client requests design changes, THINKING formed a team and included mechanical, electrical, tooling, and manufacturing engineers to come up with a manufacturing feasibility solution that ensured the structure strength, mass production, and packaging.

By communicating carefully with the client, THINKING successfully developed a robust NTC sensor that can be kept at a specified distance from the PCB and be held in place during automated assembly.