How to Select Potting Compounds for Industrial Sensors? Recommended Grades for Pressure, Torque and Temperature Sensors

The core principle for adhesive selection on industrial sensors is not “the firmer the potting, the better”. Materials shall be selected separately according to sensitive elements, housing materials, medium environment, stress requirements and waterproof specifications. Elaplus recommends SIPC 2121 for torque sensors; SIPC 1816 for temperature & pressure sensor cores; SIPC 1810 LV can be evaluated for sealing between aluminum housings and plastics; EP 1788 applies to pressure transmitters; SIGEL 1876 or EP 1708-7# are suitable for the display areas of electromagnetic flowmeters. Adhesive for Torque Sensors SIPC 2121 Flowable One-Component Silicone Adhesive & Sealant SIPC 2121 is adopted for torque sensors. This one-component silicone material features outstanding softness and elasticity.A torque sensor is designed to detect tiny mechanical variations, so the adhesive must not impose excessive constraint on sensitive structures. Adhesive for Temperature & Pressure Sensor Cores SIPC 1816 SIPC 1816 is used for temperature and pressure sensor cores. It adopts a 10:1 mixing system with curing time of 1～2 hours. Key considerations for sensor core adhesives: Recommended Grade for Sealing Between Aluminum Housing and Plastics SIPC 1810 LV SIPC 1810 LV serves for sealing and bonding between aluminum housings and plastic components of temperature & pressure sensors.Dissimilar materials have obvious differences in thermal expansion, hence the sealing material needs to accommodate interfacial displacement. EP 1788 for Pressure Transmitters EP 1788 is an epoxy potting compound for mechanical bonding, sealing and waterproofing of pressure transmitters. Adhesives for Electromagnetic Flowmeters Elaplus provides two options: They are mainly used to protect display sections, preventing water ingress and ensuring stable display performance. Industrial Sensor Adhesive Selection Table Application Recommended Grade Torque Sensor SIPC 2121 Temperature & Pressure Sensor Core SIPC 1816 Sealing: Aluminum Housing / Plastic SIPC 1810 LV Pressure Transmitter EP 1788 Electromagnetic Flowmeter Display Area SIGEL 1876 / EP 1708-7#…