In the fall of 2017, JUMO presented plastoSENS technology, an innovative and globally unique process for the production of temperature measurement technology from high-performance plastics. Since then the first individual customer projects have been implemented.
JUMO plastoSENS T temperature probes are voltage and vibration resistant as well as absolutely waterproof. Furthermore, they are characterized by their absolute design freedom and adapt to the respective installation situation. In addition to 4 standard products for different application areas, various special versions are now also available. These JUMO plastoSENS products were developed in close collaboration with customers.
Special production for motor windings
Sensors that are installed in insulating hoses have been usually used up to now for temperature measurement in motor windings. This often resulted in a lack of tightness and the sensor was at risk of breaking. Another problem was the comparatively low dielectric strength. In collaboration with various well-known manufacturers, a JUMO plastoSENS T probe that does not have all these disadvantages was therefore developed. The probe can be used in temperature ranges between -40 and +200 °C, can easily be glued into the motor winding, and has a pulse voltage resistance of up to 8 kV. In addition, the probe makes an impression with a shock resistance of more than 100 g and can be used as a standard-compliant measuring probe according to DIN EN 61800-5-1:11-2017.
Temperature measurement in premium washing and drying machines
JUMO has developed 2 JUMO plastoSENS T products for temperature monitoring in washing and drying machines in a professional environment. To measure the surface temperature a probe that can be automatically loaded in the customer's production facility and that is optimized for robot handling was designed. A material mix of a heat conducting and a non heat conducting plastic, which are absolutely firmly connected together, is used here.
To measure the dryer temperature a cost-effective and installation-friendly probe with 2 sensors was developed. It has a particularly good thermal conductivity and therefore responds extremely quickly. The sensors used in this probe are 2 NTC glass diodes of the DO-35 design type which can be used just like platinum thin-film sensors and other variants in the JUMO injection molding process.
DFM – digital free-form multisensor technology
This project allows JUMO to look to the future of plastic sensor technology. The focus here is on a so-called modular system in which sensor technology for various measurands such as temperature, moisture, pressure, or force are installed in plastic housing. Through energy harvesting the modules supply themselves with energy. The sensor signals are transmitted wirelessly via a Bluetooth interface. Up to 16 such sensor modules can then be connected to a gateway receiver.
The first planned development with this technology entails the extension of the existing JUMO plastoSENS T04 pipe surface probe through a DFM module. Up to 3 pipe surface probes each could then be operated without auxiliary energy using a module that transmits the measurement signals wirelessly.