Industrial sensors are devices that detect and sense various physical quantities such as temperature, pressure, liquid level, flow rate, vibration… etc.; they are widely used in all aspects of life and production. They are mainly sealed with potting compounds, sealing adhesives, and special silicone gels, etc.
Industrial sensors–torque sensors
Industrial sensors for torque measurement: aero engine, CNC equipment, reducer, water pump, etc
Use of adhesive points:
1. PCB board potting; (JOMP 1680)
Adhesive selection characteristic
| JOMP 1680 | 100:16 two-component polyurethane, with adhesive force and low modulus characteristics at the same time, can avoid damage to PCB board caused by high speed rotation and temperature change in the working of torque sensor; |
| JOMP 1858 | The paste has a surface drying time of 15min, hardness of A42 and bonding strength of 1.2MPa (PC). It is suitable for wire harness fixing with both strength and toughness. |
Industrial sensors–pressure sensors
Pressure measurement with industrial sensors: UAV, humanoid robot, robot dog, CNC equipment……
Use of adhesive points:
1. Sensor potting; (JOMS 1806)
2. Terminal bonding: (JOMS 2130)
dhesive selection characteristic
JOMS 1806 1:1 twocomponent silicone gel, penetration (1/10) 75mm, low product hardness, small mechanical stress;
JOMS 2130 Semi-flow, hardness A30, good bonding effect;
Industrial sensors-pressure sensors
Industrial sensors in air pump, high pressure gas tank
Use of adhesive points:
1. Sensor potting; (JOMS 1806)
2. Sealing ring bonding (JOMS 2130)
Adhesive selection characteristic
| JOMS 1806 | 1, low hardness, easy to transmit pressure;2, surface tension is large, can effectively block the surface diffusion of water droplets; |
| JOMS 2130 | Semi-flowing dehydrated silica gel has a good bonding force with silica gel products, and the small molecules produced by curing are non-corrosive; |
Industrial sensors-weighing sensors
Weighing with industrial sensors: electronic scale
Use of adhesive points:
1. Strain gauge protection; (JOMS 2121)
2. Surface adhesive (JOMS 2130, JOMS 1821)
| Adhesive selection | characteristic |
| JOMS 2121 | High transparency, good toughness, high strength; |
| JOMS 2130 | Resistant to yellowing, resistant to double 85 performance is good; |
| JOMS 1821 | Nan Da system glue, conventional coating, fast curing speed, low cost; |
Industrial sensors-temperature sensors
Temperature monitoring with industrial sensors: two-wheeled battery pack, power components of
automation equipment……
Use adhesive point: NTC element encapsulation; (JOME 2029)
Adhesive selection characteristic
JOME 2029
2: 1 two-component epoxy structural adhesive, with thixotropic, no sagging after glue application, CTE =40PPM ( <Tg);
Industrial sensors-current sensors
Current measurement using industrial sensors: power, new energy industry
Adhesive point: Integral potting of components (JOMP 1680);
selection JOMP 1680
Two-component polyurethane 100:16, hardness A85, low elastic modulus, long-term use will not damage the element due to large internal stress of the glue;
Industrial sensors-gas sensors
Gas detection with industrial sensors: oil and gas, mining, biomedicine industry……
Use adhesive points for circuit board potting; (JOME 2091, JOME 1788)
Adhesive selection characteristic
JOME2091
1. Epoxy potting compound 1:1 with thixotropy;
2. Respond to the potting and bonding of some large gap products;
JOME1788 100:15 epoxy potting compound, low cost;
Industrial sensor-proximity switch
Proximity switching with industrial sensors: mechanical equipment monitoring, automated production lines and smart home systems;
Application:
1. Circuit board potting; (JOME 1708 (5#), JOMP 1660)2. Ferrite & coil potting; (JOMP 1680)
| Adhesive selection | characteristic |
| JOME 1708（5#) | High transparency, high strength and metal shell have better adhesion; |
| JOMP 1660 | Resistant to yellowing, resistant to double 85 performance is good |
| JOMP 1680 | Can quickly fix the ferrite and coil to ensure that the coil position does not shift; |
Industrial sensors-geomagnetic sensors
Geomagnetic industrial sensors: parking Spaces, traffic lights
Use glue point: when the geomagnetic sensor is installed on the ground, it needs to be filled with glue. It needs to be cured quickly, and the strength should be high after curing, and it should be waterproof; (JOMP 6601)
Adhesive selection characteristic
JOMP 6601 polyurethane, open time 2 ~25min optional,
hardness A67, can be bagged for
Industrial sensor-light curtain sensor
Light-curtain industrial sensors: device screen door
Use adhesive points:
1. Fill between aluminum profile and shell; (JOMS 2121)
2. Fixing of components, capacitors, etc.; (JOMS 1856)
Adhesive selection characteristic
JOMS2121 Low viscosity, good fluidity, toughness and high strength;
JOMS1856 Low odor, can greatly reduce the mechanical stress
caused by vibration and cold and hot shock;
| Complete list of sensor types |
| Visual sensors, beam sensors, photoelectric sensors |
| Photoelectric sensors, optical fiber sensors, proximity sensors, slot sensors, laser sensors |
| Pressure sensors, torque sensors, weighing sensors, hydraulic sensors, tension sensors |
| Capacitive sensors, radar sensors, displacement sensors, photoelectric sensors, magnetic sensors |
| Torque sensors, moment sensors |
| Acceleration sensors |
| Flow sensors, temperature sensors, level sensors |
| Hall sensors, magnetic identification sensors |
| Solar radiation sensors, rainfall sensors, visibility sensors, pH value sensors |
| Inductive sensors, capacitive sensors |
| Inductive, ultrasonic sensors |
| Distance sensors, gas sensors |
Protect the electronics without changing the sensing mechanism
Adhesive selection for industrial sensors should begin at the boundary between the sensing feature and the protected electronics. A pressure port, an optical window and a strain-sensitive element must remain able to perform their intended function. Surrounding those features with adhesive can introduce a force, a flow restriction or an unwanted optical path. Mark the regions to be filled, bonded or left open on the assembly drawing. Potting that is appropriate around a circuit may be unsuitable directly over a moving diaphragm. Even a soft gel can influence response if the design does not account for its contact with the sensing element. Identify whether the material is expected to transmit pressure, exclude a fluid, hold a component or relieve stress. Those duties need different evidence. The electronic potting and encapsulating compounds category is relevant to protecting circuitry, with the sensing mechanism and allowable contact stated clearly. Review differential expansion between the board, housing and cured material. A rigid fill may maintain positioning while applying stress during temperature changes; a compliant fill may reduce some stress but offer less restraint against movement. Neither description predicts the behavior of the complete sensor without testing. Why protect the electronics in a way that shifts the quantity the device is supposed to measure? It’s a useful check when converting an open prototype into a sealed product. Cable and terminal fixation also need to be separated from the sensitive region. Loads on a cable can pass into an internal bond unless the mechanical design provides strain relief. Inspect where the adhesive stops and where the flexible member resumes movement, since that transition can concentrate deformation. Consider service exposure at each location rather than treating the entire housing as uniformly exposed. An external sealing interface may encounter a process fluid while the internal protective compound normally encounters only the enclosed environment. Record those distinctions before comparing material families, and retain access for any calibration or adjustment required by the sensor design.
Connect assembly inspection with calibration and drift checks
During qualification, industrial sensors should be measured before adhesive application and again after the complete curing process. Use the same reference conditions and measurement method so that process effects can be distinguished from changes in the test setup. Check offset, response and recovery where these are relevant to the sensing principle. A visually sound assembly may show drift because of stress transferred through the housing or encapsulant. Inspect representative parts for voids, incomplete contact and material entering a sensing passage. Use separate sectioned specimens where internal geometry cannot otherwise be observed. For a mixed compound, follow the selected material’s instructions and confirm that the dispensing equipment delivers a consistent mixture. For a curing system sensitive to contamination, compare cure in isolation with cure against the actual board, housing and neighboring materials. This helps locate a contact-related problem instead of attributing every uncured area to insufficient curing time. Assess environmental protection at the complete assembly. The adhesive sealants for enclosure joints may address a housing seam or connector transition, but the full leakage route still needs review. Water can track along a separated interface even if the exposed surface of the cured compound remains intact. Distinguish such paths from defects within the bulk material. After relevant temperature, moisture or chemical conditioning, repeat functional checks and inspect the interfaces. Consider whether an apparent change in sensor performance reverses when the device returns to its normal test conditions or persists as a lasting shift. That distinction can guide further investigation without asserting a cause prematurely. Where a bonded element has moved, inspect the fixing joint and the loads transmitted from nearby components. Where response has changed without movement, review stress, contamination and restrictions in the sensing path. A production change to a cable jacket, housing coating or cleaning method may require a targeted compatibility check even when the adhesive remains unchanged. Record material identity, processing history, failure location and functional measurements together. The result is a more useful basis for selection than an isolated claim that an adhesive is suitable for sensors.
JOME manufactures the full JOME product catalogue in its own factory for customers in more than 30 countries. Readers continuing from Introduction to the Glue Solution for PCB will find the Shanghai JOME Industrial adhesive portfolio covers the full portfolio, and project questions go to the contact the JOME technical team.